Hide

Error message here!

Lost your password? Please enter your email address. You will receive a link to create a new password.

Error message here!

Back to log-in

Close
Todays Dietitian1

The Potential Danger of Acrylamide

This chemical in foods has been shown to cause cancer in mice but more research is needed to determine its risk in humans. Did you know that if clients broil, fry, toast, bake, or barbecue starchy foods, such as bread and potatoes, they can increase their intake of the chemical acrylamide? The more the food browns, the more acrylamide is present.

Why Some People Eat Lots— But Don’t Get Fat

Some of my clients seem jealous of their teammates. “They eat twice as much as I do and they are skinny as a rail. I just smell cookies and I gain weight,” spouted one collegiate runner. She seemed miffed that she couldn’t eat as much as her peers—and she couldn’t understand why. They all ran the same mileage, did the same workouts, and were similar in body size. Life seemed so unfair!

Yes, life is unfair when it comes to weight management. Some people gain (or lose) body fat more easily than others. Unfortunately, fat gain (or loss) is not as mathematical as we would like it to be. That is, if you persistently overeat (or undereat) by 100 calories a day, in theory you will gain (or lose) 10 pounds of body fat a year. But this theory does not hold up in reality. People vary greatly in their susceptibility to gain or lose body fat in response to over- or under-eating.

muesli with fresh fruits as diet foodIn general, research has suggested when people overeat, about 85% of the excess calories get stored as fat and the rest gets lost as heat. Overfed fat cells grow in size and in number and provide a storehouse of energy. Obese people commonly have enough fat stores to last a year or more; even lean athletes have enough fat stores to fuel a month or more. Fat can be advantageous during a time of severe illness or a famine.

Burning calories

Lets take a closer look at the four primary ways you burn calories:

  1. Basal metabolic rate (BMR): BMR refers to calories burned when you are at rest and unfed, such as upon waking in the morning. Your heart, lungs, liver, and other organs use a fairly consistent amount of energy each day to keep you alive. Some athletes believe they have a slow metabolic rate that causes them to gain weight easily. Not the case. Very few people have a “slow metabolism.”
  2. Thermic effect of food: This refers to the energy needed to digest, absorb and either convert food into fuel for the muscles and organs or store the excess energy as body fat. The thermic effect of food increases ~14% with overfeeding, due to the added energy needed to process the excess food.
  3. adam-runPurposeful exercise: This is what you burn during your workouts. This can vary considerably from day to day.
  4. Non-exercise activity thermogenesis (NEAT): This refers to activities of daily living (brushing teeth, washing dishes, etc.), fidgeting, energy used to maintain posture when standing and sitting, and spontaneous muscle contractions that occur during the day apart from your purposeful exercise. People with high NEAT spontaneously putter around the house, fidget with pencils, use their hands when talking, and are animated and lively. NEAT is genetic and somewhat predictive of who stays lean throughout their lifespan. People with low NEAT are good at sitting quietly.  For example, obese people tend to sit 2.5 hours more a day than their peers and this can save them about 350 calories a day. Are they obese because they sit more? (Or do they sit more because they are obese?) Is NEAT the problem?

What happens with overeating?

To better understand why some people lose or gain weight more easily than others, Dr. James Levine PhD of the Mayo Clinic designed a study to look at the biological mechanisms that hinder fat-gain. Dr. Levine studied 16 non-obese subjects (12 males and 4 females), ranging in age from 25 to 36 years. They volunteered to eat 1,000 excess calories a day (above what they needed to maintain weight) for 8 weeks. The subjects were healthy, did not do purposeful exercise more than twice a week, and maintained a stable weight. Prior to being overfed, the researchers monitored the subjects for two weeks to learn how much food they regularly consumed to maintain their weight.

During the study, the subjects lived at their homes but ate supervised meals at the research center. The food had been carefully prepared and measured in a metabolic kitchen. The weight-gain diet was high in protein (20% of total calories) and fat (40% of calories), and low in carbohydrate (40%). The researchers accounted for almost all of the excess 1,000-calories a day. On average, ~430 of the 1,000 calories were stored and ~530 were dissipated via increased energy expenditure. The researches even measured 3 days of poop before and at the end of the study to be sure the subjects did not excrete calories during overfeeding. Only 38 calories a day got flushed down the toilet during overfeeding — 13 calories more than during normal eating.

healthy diet Depositphotos_6270042_xsHere is the fate of the 1,000 excess calories the subjects ate:

  • Energy stored as fat ranged from 60-685 calories per day
  • Energy stored as muscle ranged from 15-80 calories per day
  • Additional calories burned by organs: about 80, on average
  • Additional calories used to digest the extra food: about 135, on average
  • Additional calories burned via NEAT ranged from none to 690.

The researchers used highly accurate methods to measure changes in body fat (DXA). Some of the subjects gained 10 times more fat than others, ranging from 0.8 to 9 lbs (0.36 – 4.23 kg). The overall weight gain ranged from 3 to 12 lbs (1.4 -5.5 kg), some of which was additional muscle. NEAT explained the big variation in weight gain that occurred with the subjects in this overfeeding study. The subjects who were good fidgeters and putterers gained less.

The average increase in NEAT was 336 calories a day, but this actually ranged from burning 98 calories less than baseline to burning 690 calories more than baseline. The subject who burned the most calories strolled around the research facility (or did equivalent movement) about 15 minutes more per hour than the other subjects.

Conclusion

Despite popular belief, the ease of gaining weight is unlikely due to having a “slow metabolism.”  Most often, athletes who are easy gainers are mellow, sit calmly, and don’t fidget. This contrasts to teammates that are bouncing around the locker room. If you are the mellow-type, blame your genetics — not a slow metabolism — for your ease of weight gain. And perhaps you can be grateful you can spend less money on food because you don’t eat as much?

References
Levine J, N Eberhardt, M Jensen. Role of Nonexercise Activity Thermogenesis in Resistance to Fat Gain in Humans. Science  283:212-214, 1999.

Levine J, Vander Weg M, Hill J, Klesges R. Non-exercise activity thermogenesis: the crouching tiger hidden dragon of societal weight gain. Arterioscler Thromb 26(4):729-36, 2006.


From The Athlete’s Kitchen; Copyright: Nancy Clark, October 2014

wheatiesBoston-area sports nutritionist Nancy Clark, MS, RD offers one-on-one consults with both casual and competitive athletes. Her private practice is in Newton, MA (617-795-1875). For information about her Sports Nutrition Guidebook (2014) and food guides for runners, cyclists and soccer players, see www.nancyclarkrd.com. For online education, see www.NutritionSportsExerciseCEUs.com

nutrition-coach-foundations

ADHD, Athletes & Appetite Issues

Many teens and adults with attention deficit hyperactivity disorder (ADHD) are great athletes. In elementary school, they may not have been good at sitting quietly, but they certainly could excel at sports. Many found exercise had a calming, centering effect. With maturation, exercise still helps them get through their school/workday.

Athletes with ADHD often have trouble organizing an effective fueling protocol, including the basic tasks of shopping for and preparing food, as well as having the right foods available at the right times.  This can create problems with low blood sugar (hypoglycemia) and hunger that gets disguised as inability to concentrate, stay focused on a task, edginess, hot temper, and reduced athletic performance. Athletes with ADHD often disregard these symptoms, thinking they relate to their ADHD diagnosis, not hunger and poor diet.

ADHD medicationsDiet and healthy food

Athletes with ADHD often take appetite-killing meds that easily disrupt normal fueling cycles and contribute to fluctuations in energy. Athletes need steady energy to be able to concentrate and perform at their best. Hence, athletes with ADHD need to vigilantly monitor their bodies for early signs of hunger, including feeling fatigued or moody. Some may seek an energy drink such as Red Bull or some coffee, but the solution is not caffeine. They need fuel!

When athletes with ADHD miss meals due to lack of planning, they often end up craving sweets—a sign the body is too hungry and wants a sugar-fix. They can then easily succumb to overindulging in cookies, candy, and other so-called “junk foods.” This may happen at 10:00 pm, after their appetite-suppressing meds have worn off, and this can disrupt normal sleep patterns, as well as kill their appetite for their breakfast and that perpetuates a bad eating cycle.

What’s an athlete with ADHD to do?

The information below is helpful for any athlete – not just those with ADHD…

  • Take mealtimes seriously. If you can find the time to train and compete, you can also find the time to fuel right. In fact, all competitive athletes who don’t show up for meals might as well not show up for events. Everyone loses his or her competitive edge with hit-or-miss fueling.
  • Fuel your body on a regular schedule by eating even-sized meals at least every four hours. If meds curb your appetite, plan to eat by the clock, and not by (non-existent) hunger. If necessary, set the alarm on your watch or cell phone. If the sight or small of food makes you nauseous, try cold beverages such as a fruit smoothie with additional protein powder.
  • Organize your eating into four “food buckets.” Consume the contents of a bucket every four hours, either as a meal (Breakfast, Early Lunch, Late Lunch, and Dinner) or as smaller mini-meals based on wholesome foods, not sweets.

For most athletes, each meal/food bucket should be the caloric equivalent of two or three slices of pizza. That’s about 500 to 800 calories per bucket (or 2,000 to 3,200 calories per day), depending on your body size, sport, and energy needs. For athletes on appetite-curbing ADHD meds, the breakfast bucket should be the biggest bucket and incorporates some of the lunch calories that will otherwise get left uneaten.

The following sample menu has 4 food buckets that offer a steady supply of energy for an ADHD high school athlete:

Time Bucket Sample meal
7:00 Breakfast Bagel + peanut butter + tall glass milk + banana
OR 3-egg omelet (lowfat cheese,veg) + toast + fruit
Better bet if unable to stomach all of lunch:
Bagel & peanut butter + omelet + milk + banana
11:00* Lunch #1 Tuna sandwich/whole wheat bread + string cheese  + milk
3:00* Lunch #2 Pre-exercise: Energy bar + apple
Recovery: Dried fruit & nuts + pretzels
7:00 Dinner Chicken + brown rice + veggies + milk

* Remember: If you take ADHD meds, you may not feel hungry but your body still needs fuel. Figure out what you can eat, regardless!

• Eat BEFORE your appetite-killing meds kick in. Again, figure out how to front-load your calories. For example, one athlete with ADHD started eating a hearty sandwich for breakfast. Another enjoyed “planned overs” from dinner the night before. By front-loading, they felt calmer during the day, had better workouts in the afternoon, and were better able to focus on the task at hand.

nutrition-coach-foundations• Plan to fill your food buckets with foods in their natural state, and limit your intake of highly processed foods. Some health professionals believe additives and food coloring in processed foods can trigger hyperactivity in certain people. Plus, highly processed foods often offer less nutritional value and fewer health benefits. Shop for fresh foods along the outside aisles of the grocery store: fresh fruit, vegetables, lean meats, low fat dairy, and whole grain breads.

• Include a protein-rich food in each food bucket, such as eggs, cottage cheese, peanut butter, lowfat cheese, Greek yogurt, turkey/cheese roll-ups. Again, nothing is wrong with having dinner for breakfast; enjoy that cheeseburger and oven-baked “French fries” and then roll the scrambled eggs and cheese into a wrap for lunch. Protein is satiating and helps stabilize blood sugar. A trail mix made with nuts and dried fruit is another option with compact calories for easy nibbling.

Make a shopping list before you go to the grocery store, and shop after having eaten a meal. That enhances your chances of choosing more of the best sports foods, and less of the rest. Examples include: orange juice rather than sports drink; oranges instead of orange juice; oatmeal (served with a little honey) instead of frosted flakes (with a lot of sugar); whole-wheat bread rather than white bread; scrambled eggs instead of Eggo waffles; baked potatoes in place of French fries; plain yogurt sweetened with maple syrup instead of pre-sweetened yogurt; trail mix rather than M&Ms; protein bars rather than candy bars.

Not only for athletes with ADHD

If you find yourself edgy and unable to focus in the afternoon, experiment with reorganizing your meals and snacks into four (calorically-equal) food buckets and notice the benefits: better focus, fewer cravings for “sweets”—and better performance.

For more information about management of ADHD in kids and adults: http://www.additudemag.com

Reprinted from The Athlete’s Kitchen, August 2014
Copyright: Nancy Clark MS RD CSSD 

Boston-area sports nutritionist Nancy Clark, MS, RD counsels both casual and competitive athletes. Her private practice is in Newton, MA; 617-795-1875). For information about her new Sports Nutrition Guidebook, 5th edition, see nancyclarkrd.com. For online education, also see sportsnutritionworkshop.com.

tuna-slices

Super Sports Foods: Do They Really Need to be Exotic?

Do you ever get tired of reading yet-another headline about The 10 Best Super Sports Foods, only be instructed to buy exotic fruits, ancient grains, and other unusual items? Do we really need chia, spelt, and quinoa? Is anything wrong with old-fashioned peanut butter, broccoli and brown rice? Doubtful! Powerful nutrients are found in standard foods that are readily available at a reasonable cost. You know, oranges, bananas, berries, oatmeal, almonds, hummus, lowfat yogurt, brown rice, tuna … the basic, wholesome foods recommended by the government’s My Plate (www.ChooseMyPlate.gov). Are those foods exotic? No. But do they still do a great job of offering super nutrition? Yes!

To add to the confusion about exotic sports foods, the sports food industry touts their list of engineered super sports supplements. Ads lead you to believe you realltuna-slicesy need to buy these products to support your athletic performance. The question arises: Are there really special nutrients or components of food that can help athletes to go faster, higher or stronger? If so, can they be consumed in the form of whole foods or do we actually need special commercial supplements?
At a 2014 meeting of Professionals in Nutrition for Exercise and Sport (PINESNutrition.org), exercise researchers from around the globe discussed that topic and provided the following answers to the following thought-provoking questions.

Is there any difference between consuming pre-exercise caffeine in the form of pills, gels or coffee?

Regardless of the source of caffeine (pill, gel, coffee), it is a popular way to enhance athletic performance. Take note: High doses of caffeine (2.5 to 4 mg/lb body weight; 6 to 9 mg/kg) are no better than the amount athletes typically consume in a cup or two of coffee (1.5 mg/lb; 3 mg/kg). Hence, drinking an extra cup of coffee is unlikely to be advantageous, particularly when consumed later in the day before an afternoon workout and ends up interfering with sleep.

cherriesDo tart (Montmorency) cherries offer any benefits to sports performance? If so, what’s the best way to consume them?

Tart cherries (and many other deeply colored fruits and veggies) are rich in health-protective antioxidants and polyphenols. Tart cherries can reduce inflammation, enhance post-exercise recovery, repair muscles, reduce muscle soreness, and improve sleep. Athletes who are training hard, participating in tournaments, or traveling through time zones might be wise to enjoy generous portions. Yet, to get the recommended dose of cherries that researchers use to elicit benefits, you would need to eat 90 to 110 cherries twice a day for seven days pre-event. Most athletes prefer to swig a shot of tart cherry juice concentrate instead!

What about food polyphenols such as quercetin and resveratrol?

Polyphenols are colorful plant compounds that are linked with good health when they are consumed in whole foods. Yet, polyphenol supplements, such as quercetin or resveratrol, do not offer the same positive anti-oxidant or anti-inflammatory benefits. An explanation might be that once in the colon, where most polyphenols go, parts leak into the bloodstream during heavy exercise. These smaller compounds create the anti-inflammatory effect. Athletes who routinely eat colorful fruits during endurance training offer their gut the opportunity to distribute good health!

Does curcumin reduce chronic inflammation?

Curcumin (an active constituent of tumeric, the spice that gives the yellow color to curry and mustard) has beneficial properties that have been shown to help prevent cancer, enhance eye health, and reduce inflammation. Subjects with osteoarthritis (an inflammatory condition) who took curcumin supplements for 8 months reported less pain (due to less inflammation) and better quality of life. Unfortunately, curcumin is rapidly metabolized and therefore has low bioavailability when consumed in the diet. To increase absorption, supplements often contain curcumin combined with piperine (black pepper extract).

Does green tea help improve body composition in athletes? What is the best way to take it?

teaGreen tea reportedly enhances fat oxidation and helps with weight loss, particularly when combined with caffeine. But the amount of additional fat burned is minimal, and the 10 to 12 cups of green tea needed to create any effect is a bit overwhelming. (Hence, most studies use a green tea extract.) Because green tea has not been studied in lean athletes, we can only guess that it is unlikely to offer a significant improvement in body composition.

Is watermelon juice a powerful stimulant for sports performance?

Watermelon juice is a source of L-citrulline, an amino acid that contributes to production of nitric oxide. Nitric oxide helps relax the blood vessels and thus enhances blood flow so more oxygen can get transported to the working muscles. One study with athletes who consumed L-citrulline supplements reports they attained a 7% higher peak power output as compared to when they exercised without L-citrulline.

Yet, when athletes were given watermelon juice (contains L-citrulline) or apple juice (that has no L-citrulline), the peak power was only slightly higher and the L-citrulline gave no significant benefits. The bottom line: Watermelon is a nourishing fruit and a welcome refreshment for thirsty athletes. You would need to eat a lot of watermelon to get the equivalent of L-citrulline found in (expensive) supplements. Your best bet is to enjoy watermelon in standard portions as a tasty addition to your sports diet.

What can be done with pea, hemp, or other plant protein to make them as effective as whey for building muscle?

In general, plants (such as peas, hemp) contain less leucine than found in animal proteins. Leucine helps drive the muscle’s ability to make new protein. Hence, to increase the muscle-building properties of plant proteins, you need to either eat large portions of, let’s say, hemp or pea protein (to get a bigger dose of leucine), or you can combine those plant-foods with leucine-rich proteins, such as soy, egg, or dairy foods.

The bottom line: Your best bet to optimize performance is to optimize your total sports diet. No amount of any supplement will compensate for lousy eating, though a few just might enhance a proper diet.

Boston-area sports nutritionist Nancy Clark, MS, RD counsels both casual and competitive athletes. Her private practice is in Newton, MA (617-795-1875). For information about her Sports Nutrition Guidebook (new 5th edition) and food guides for runners, cyclists and soccer players, see www.nancyclarkrd.com. For online education, also see www.sportsnutritionworkshop.com.

Copy of Mixed_Cut_Fruit_iStock_000003017352Small

7 Simple Steps to Becoming ‘The Biggest Winner’

You may have read Jaclyn’s recent post outlining her thoughts on the television show  The Biggest Loser. Here, she follows up and outlines simple steps you can take to become the ‘biggest winner’ the healthy way, not relying on short term rapid weight loss to reach your goals.


Research demonstrates that rapid weight loss programs are not recommended nor do they support any correlation to long-term success. Follow some of these simple steps to maximize your chances for success in achieving your “healthy lifestyle goals.”

STEP 1: Assess your Readiness for Change

Embarking on something that you are not ready to do could be harmful because an unsuccessful program could impair your self-esteem and dampen future efforts to achieve your healthy lifestyle goals. Before setting any short or long-term goals, it is recommended to take some time to reflect on your reasons for wanting to set these goals and initiate this journey.

senior-yoga-waterSTEP 2: Realize you are an individual

Just as with success, we define what “healthy” means to us. This is an individual aspiration and although our loved one’s can help to motivate us to want to make changes, we ultimately need to aspire to our own picture of “healthy” in order for us to stick with new lifestyle changes. Define what healthy means to you!

STEP 3: Eat real food

Evaluate where you can make minor changes in your dietary intake. Increase fruits, vegetables and water and decrease your intake of sugar and processed food. Eat close to the earth and prepare as much food as possible on your own. But be realistic – don’t expect perfection! You can start by making small nutritional changes that have a big impact on your health! And remember….FIBER is your FRIEND!

Copy of Mixed_Cut_Fruit_iStock_000003017352SmallSTEP 4: Don’t “DIET”

Always remember that a calorie is not just a calorie. Contrary to what we were taught in school many years ago, it is not just as simple as calories in, calories out. Many different factors make up the quality of the calories you take in (or expend). To determine what the best foods are for YOU, it is best to contact a Registered Dietitian or qualified healthcare professional.

STEP 5: Exercise

Choose an activity you enjoy and get some professional advice on the right activities for you and how to do them safely. It should challenge your muscles so you get stronger, but exercise should not hurt. No Pain No Gain does NOT pertain to YOU if exercise is done properly.

STEP 6: Focus on progress

Rid yourself of the All IN or All OUT mentality. Rather than telling yourself “I need to lose X pounds” set small goals toward better health and be proud of your accomplishments in the process. Many times if we set a goal and don’t achieve it, we can give up all together thinking that if we don’t make it to the summit of the mountain, than what’s the point. You still made progress – reward yourself for that and get up tomorrow and do it again. If you fall into old habits, don’t beat yourself up – tomorrow is another day.

STEP 7: Simple Strategies

Switch from drinking soda to seltzer water. Keep raw nuts, carrots and high fiber foods readily available for snacking. Take a therapeutic walk every day. When you’re stronger and ready for something new, challenge yourself a little more with things like roller skating, indoor rock climbing, or setting a goal for a summer hike. If you fall into old habits, don’t beat yourself up – tomorrow is another day.

Everyone has different health goals, and the way we approach them is not a one-size-fits-all process. It’s about more than just numbers on a scale. It’s also about your energy, how you feel, and so many other factors. Health is a journey, and we are all on it together, but in different places. When we understand that, and support ourselves and each other, we all win. And THAT is the message I want my son, and all of America, to hear.

Jaclyn Chadbourne, MA is a Clinical Exercise Physiologist and Co-Owner of the Medically Oriented Gym (M.O.G.) in South Portland, Maine. With a passion for sustainable healthy living and desire to advocate for patient-centered care, Jaclyn works to help the M.O.G. support community resources for all special populations and to implement and oversee clinical protocols. Read more from the MOG on their website, themoggroup.com/blog

meal

Carbs, Protein & Performance

What percentage of my diet should come from carbohydrates? … Should I exercise on empty? … How much protein should I eat after I lift weights? … Is whey the best source of protein?

These are just a few of the questions addressed at the annual meeting of SCAN, the Sports And Cardiovascular Nutritionist’s practice group of the American Dietetic Association (www.SCANdpg.org). Over 400 sports dietitians gather to learn the latest news from prominent sports nutrition researchers. I hope this information will help you choose a winning sports diet.

Carbohydrate Update

Louise Burke, PhD, Director of Sports Nutrition at the Australian Institute of Sport, addressed the following questions:

• What’s the best percentages of carbohydrates, protein, and fat for a sports diet — 40-30-30 or 60-25-15?

mealNeither! A better approach is to define nutrient needs according to body weight. For example, the International Olympic Committee developed these guidelines:
Intensity of exercise gram carb/kg body wt gram carb/lb body wt
Low intensity 3-5 g 1.5-2.5
Moderate (~1 hour/day): 5-7 g 2.3-3.2
Endurance (1-3 hours/d): 6-10 g 2.5-4.5
Extreme (>4-5 hours/d): 8-12 g 3.5-5.5

• How much should I eat during exercise?

During exercise that lasts 1 to 2.5 hours, you want to target 30 to 60 grams of carbohydrate (120 to 240 calories) per hour. That’s about 1 to 2 gels or 16 to 32 ounces of a sports drink per hour (after the first hour, if you ate a pre-exercise meal or snack)

During endurance exercise, 60 to 90 grams of different sources of carbohydrates (such as sports drink, banana, gummy candy) per hour is appropriate, as tolerated. Consuming the higher end of the range (90 g, as compared to 60 g) is associated with greater stamina and endurance.

• How long does it take to refuel from exhaustive exercise?

If you eat a carb-rich sports diet, you can replenish depleted glycogen stores in 24 to 36 hours post-exercise (with no exercise during that time). While it’s important to pay attention to your recovery diet, most athletes do not need to eat immediately after exercise unless they are doing double workouts. (Within an after exercise, yes; immediately, no.)

• What can I do if I cannot tolerate any food during exercise?

Try mouth swishing with a sports drink. This sends a message to the brain that energy is forthcoming and you’ll feel more energetic. Swishing can enhance performance by 2% to 3% if you are exercising on empty and have not eaten pre-exercise—as often happens with morning exercisers. (Swishing seems to be less beneficial after a pre-exercise meal, but more research is needed to verify those findings.)

• Should I train with poorly fueled muscles, as a means to teach my body to burn more fat, so it spares the limited glycogen stores?

Active seniorsTraining with low glycogen stores (“train low”) drives up the metabolic adaptations to burn more fat. By burning fat instead of glycogen, you’ll spare the limited glycogen stores. Theoretically, this should enhance stamina and endurance because glycogen depletion is associated with fatigue. To date, “training low” has been most effective in research with untrained individuals. Athletes who exercise with depleted glycogen are unable to exercise at high intensity and that may hinder performance.

Training with low glycogen during lower intensity workouts might be one way to stimulate the muscle adaptations to burn more fat (and thus spare the limited glycogen stores). But athletes should do their high intensity workouts when they are fully glycogen-loaded.

Exercise physiologist and researcher John Hawley, PhD of Melbourne, Australia acknowledged that train low/compete high is receiving a lot of attention among serious endurance and ultra-distance athletes. Hawley suggests “train low” should be defined as “train at 50% of resting muscle glycogen, 50% of the time”—and only for selected sessions. Training with low carbohydrate availability can be achieved by exercising with 1) low blood glucose, or 2) low muscle glycogen stores. Both generate adaptations that promote the training response and might be advantageous to competitive endurance athletes. Hawley cautions serious athletes that “training low” compromises training intensity and may lead to inferior performance during an event, particularly if the athlete needs to do a competitive sprint to the finish. That final sprint often determines who wins…

Protein Update

Stuart Phillips, PhD, professor of kinesiology, McMaster University in Ontario, Canada presented an update on protein, answering these questions:

• Do athletes need more protein than non-athletes?

eggsWhile the recommended protein intake for the average American is 0.4 gram protein per pound body weight (0.8 grm protein per kg), most exercise scientists agree that athletes need a more to optimize muscular development: 0.5 to 0.8 grams protein per pound (1.2 to 1.7 grams of protein per kilogram) body weight per day. However, most young women and men generally consume about 0.55 to 0.65 g protein/lb (1.2 g and 1.4 g protein/kg) body weight per day, respectively. They can appropriately meet their higher need without supplements.

• How much protein do I need after I lift weights?

Consuming 20 grams of protein-rich food (Greek yogurt, tuna sandwich, 16 oz. chocolate milk) after resistance exercise is plenty to optimize the rate of muscle synthesis. Athletes should then continue to eat protein and carbs at meals and snacks throughout the day.

The highest rate of protein synthesis is 3 to 5 hours post-exercise. This raises the question: Should athletes who work out twice a day plan to avoid exercising during that time frame? The “good stuff” (building muscle) happens during rest and recovery and the “bad stuff” (muscle damage) happens during exercise. Remember: rest is an essential part of a strength training program!

• Should I buy whey protein supplements?

Probably not, unless you are a frail, elderly person with a limited food intake. Drinking milk (20% whey, 80% casein) and eating a balanced sports diet with adequate protein from many sources can be as effective as whey supplements. Hard, hard work is the basic trigger for bigger muscles!

From The Athlete’s Kitchen
Copyright: Nancy Clark MS RD CSSD, April 2011

Nancy Clark, MS, RD, CSSD (Board Certified Specialist in Sports Dietetics) helps both casual and competitive athletes win with nutrition. Her private practice is in Newton, MA (617-795-1875). Nancy Clark’s Sports Nutrition Guidebook and her food guides for new runners, marathoners offer additional information. They are available at www.nancyclarkrd.com. See also sportsnutritionworkshop.com.

Who Really Ends Up Being The Biggest Loser?

After watching some episodes of The Biggest Loser TV show in school recently, my 6th grade son has started talking about how cool it would be if HE could get on the show someday. My son is not obese, is healthy and athletic, and the fact that he thought this crying, screaming, extreme dieting, working-out-six-hours-a-day-until-you-collapse spectacle might be good for him renewed my long-time concerns about the messages this show is sending, not only to impressionable kids but to everyone who wants to lose weight as quickly as possible.

For anyone unfamiliar with the show, it gathers about 16 morbidly obese individuals, divides them into 2 competing teams led by well known personal trainers, then follows their weight loss efforts for 12 weeks. During the 12 weeks, which culminates in 1 winner receiving a large monetary prize, the contestants who lose the least amount of weight are at risk of getting “voted off” the show each week, Survivor style. While the premise of the show is motivating people to lose weight, it is no more than a reality game show at its core and needs to be balanced with some discussion about healthy ways to make positive, lasting lifestyle changes.

exercise-86200_640Of course, everyone’s diet/fitness level can always use improvements, and there’s no denying that America has a weight problem. Although The Biggest Loser can prompt some good discussions about diet and exercise, it promotes unhealthy, unrealistic methods of weight loss. The contestants’ diets are severely restricted to around 1,200 calories a day. Using this barely minimal caloric intake as fuel, they exercise for 4-6 hours a day until people frequently collapse or get physically sick. Then the trainers scream at them to shake it off, shaming them into believing they can – and should – push through the pain and exhaustion. As if they really wanted to lose weight badly enough, their will power would prevail over their body. Contestants are expected to lose several pounds each week, when a healthy rate is 1-2 pounds a week at the most. If this doesn’t encourage eating disorders, I don’t know what would. Off camera, it’s rumored that contestants will do anything to get the numbers on the scale lower, like dehydrating themselves or using laxatives or other methods to lose weight faster.

biggest-loserThe most recent Biggest Loser winner, Rachel Frederickson, ended the show dangerously thin. According to an article on CNN, Frederickson went from 260 pounds to 105 pounds, losing 59.62% of her body weight. At 5 feet, 5 inches tall, that puts her body mass index at 17.5. Anything under 18.5 is considered underweight and can have serious health repercussions.

Even if it was done for the sake of the cash prize, the damage it has done to her body is unmistakable. What’s more, the message this show sends season after season by rewarding someone for losing a lot weight in a very short time using unhealthy methods is disheartening. I’m not sure if The Biggest Loser is the “winner” of the show or the millions of people watching and thinking this represents the gold standard in health and physical fitness.

Jaclyn Chadbourne, MA is a Clinical Exercise Physiologist and Co-Owner of the Medically Oriented Gym (M.O.G.) in South Portland, Maine. With a passion for sustainable healthy living and desire to advocate for patient-centered care, Jaclyn works to help the M.O.G. support community resources for all special populations and to implement and oversee clinical protocols. Read more from the MOG on their website, themoggroup.com/blog

Todays Dietitian1

Statin Use Associated With Reduced Risk of Prostate Cancer Recurrence

Men who begin taking statins after prostate cancer surgery are less likely to experience a recurrence of their cancer, according to a retrospective analysis led by researchers at Duke Medicine.

“Our findings suggest that beginning statins after surgery may reduce the risk of prostate cancer recurrence, so it’s not too late to start statins after a diagnosis,” says lead author Emma H. Allott, PhD, a postdoctoral associate in the division of urology at Duke and the Durham VA Medical Center.

A secondary analysis revealed that this protective association was significant only among men who aren’t black, although this possible racial disparity requires further investigation. The study appears online in BJU International (formerly the British Journal of Urology).

Prostate cancer is the most common nonskin cancer in men, according to the American Cancer Society. For men with localized disease, radical prostatectomy is a common treatment option. However, approximately 30% of men experience a recurrence of their prostate cancer within 10 years of surgery.

Read the full article at Today’s Dietitian…