Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine. You can follow Amby’s tweets at and his Runner’s World blogs at and

Ultra marathon performance linked to high training and low bmi. Nausea and blisters = big DNF problems.

Among female recreational half-marathoners, faster training paces linked to lower body fat and faster race times.

Hip abduction tip: When doing side leg raises, extra weight on legs gives no extra benefit.

Exercise nutrition expert Louise Burke’s thoughts on the risks-benefits of training with a low-glycogen supply.

Blood doping probably does more than just increase hematocrit. Benefits are likely multifactorial, include even mood.

After 30 years, long-term cross-country skiiers have lower death rate than nonskiiers.

In large cohort of nordic skiiers, those who race often with fast times have higher incidence of osteoarthritis.

Cardiac-screening study: In Singapore, ECG screening for hypertrophic cardiomyopathy yields prevalence of just .005 %.

The plot thickens (of course): Different genes influence runner responses to an antioxidant oil.

Fitness (vo2 max) more important than total physical activity (like slow walking) to reduce all-cause mortality.

ACSM expert warns “perhaps some important losses may even occur” from antioxidant supplements. So eat fruit, veggies.

Marathon training yields quadriceps fiber changes–some get bigger, some smaller–“very specific” to training done.

My new Peak Performance blog: Does pre-marathon travel increase the risk of deep vein thrombosis?

Happy Social Security! Exercise level at age 65 “strong predictor of well being” 7 years later.

Wow, a controlled light exercise trial with 90 yr olds! Exercise boosts muscle strength, decreases risk of falls.

Motiving people to exercise is huge challenge. Here, “10,000 steps” goal better than “30 minutes.”

Amazing how all the nitrate studies are yielding positive results. Here with subjects who have peripheral artery disease.

At a submax pace, barefoot running uses 2 to 5.7% less oxygen (is more economical) than shod running.

Viagra does not improve endurance performance (15K cycle time trial) in men or women at mod or high altitudes.

What’s best max HR formula? Croatian Army likes: 205 – (age/2).

Boston Marathon, with fast qualifying times, has < cardiac death rate than other marathons: 1/374,000 vs 1/128,000.

The more workouts per week throughout life, the stronger and more flexible the heart in old age. Conf. presentation.

Multivitamin use has no mortality effect, good or bad. Eleven year follow up of 182,000 participants.

During “block” of heavy training, extra protein reduces psych stress and may lessen performance loss.

In heat, caffeine raises body temp slightly, does not improve endurance performance of cyclists.

Among 198 beginning runners (>10:00/mile), no significant injury effect for peak force or loading rate.

Meta-analysis: Dehydration to 4% not a factor in time-trials (more like real races than “duration” tests).

Use of cooling vest during warm up for hot 10K run fails to produce meaningful performance differences.

Cardiac biomarkers back to norm 72 hrs post marathon. From Germans who have published troubling mara-heart studies.

Latest study of cardiac events in marathons: 1 death/128,000; 1 “arrest”/45,000. From total 1.4 million runners to ’09.

Great study: How training regulates gene expression, ie, endurance vs strength. Plus mitochondria and fat-carb utilisation.

Doh science: Running across the side of a hill creates many atypical forces, possibly injurious.

Post-exercise chocolate milk beats carbs-only for subsequent performance and protein synthesis.

Around The Web With Amby


Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

Peter Wood (friend, great runner, important exercise-heart-health researcher) dies at 81.

Dietary nitrates again: In rat study, nitrate is “strongly protective” against kidney and heart disease.

You want healthier kids? Fix the father. Results of a controlled study in Australia.

In well-trained cyclists, strength training in season retains muscle size and “further improves” performance.

Genetics of sweating: Distance runners with AQP1 (G→C) gene variation lose more than 2x body fluid in 10K race.

Weight loss exceeds total body water loss in endurance runners, so weight is not a good measure of dehydration.

Olive leaf polyphenol, hydroxytyrosol, may have beneficial effect in endurance muscle training and racing.

Water therapy might be good 4 you after exercise (or maybe not), but it will likely increase your calorie consumption.

You train your heart and legs, but what about your gut, which has to handle all those in-race fluids and sugars?

Oh, my, what next? 55K of trail running is tough on the leg muscles, and masters runners need more recovery time.

Meta analysis of carbs during endurance exercise reveals 41,000+ studies. The 50 best = yes, carbs work.

In small test using moderate exercise, more fat burned after light meal than after fasting.

Among 370 Hong Kong marathoners, virtually no blood sodium problems at the end.

Gene that affects collagen and flexibility (lower leg stiffness) may increase running economy.

Another muddy CHO vs PRO drinks study. This one finds low CHO + PRO > higher CHO only, but CHO sources aren’t =.

Pregnant elite women runners might “compromise fetal wellbeing” if they exercise at higher than 90% of max.

Young cyclists don’t care much about possible health risks of doping. More interested in “short term performance.”

Creatine could produce big results for seniors, enhancing strength, performance, and brain functioning.

More evidence for hip-abduction exercises for runners with knee pain. Increased muscle strength, less pain in 3 weeks.

Among 80 endurance athletes, those training harder came down with more winter colds.

Counter to hypothesis, a fatiguing run produces no change in lower-leg measures among 12 competitive m & f runners.

For tibial stress syndrome, shockwave therapy (5 sessions over 9 weeks) produces significantly reduced recovery time.

Help for knee injuries may come from: weight-loss, upper leg flexibility, quad strengthening, orthotics.

“Variables associated with brain activity”–glucose, dopamine, noradrenaline–explain much of RPE-performance link.

Veteran marathoners have more myocardial fibrosis. Great NYTimes article. Still no adverse mortality data.

Computer exergaming can provide fitness benefits for kids. Importantly, enjoyment was highest for fattest kids.

Two recent h.s. athlete deaths put sudden cardiac arrest in headlines. But new study = screening doesn’t reduce risks.

More than you might want to know about heavy training vs rest periods, and effect GI tract and stool frequencies.

Physical inactivity affects 21% world’s adults (76 countries). Worst in wealthy, urban areas, among women, elderly.

Want to make a dent in childhood obesity? Start by changing their parents’ behavior.

You don’t need an HR monitor or other fancy gear to find your aerobic training zone: The “Talk Test” works fine.

Hi intensity intervals improve performance of 9-11 yr old swimmers.

Top Nordic skiier tested with unusually high vo2 max (90.6) and even more impressive submax lactate levels.

Protein drink during endurance exercise does not increase muscle protein synthesis over carb drink.

Orthotics gets 2 votes for injury prevention (not rehab) from meta-analysis and military.

Orthotics might prevent injuries, but not correct them. Orthotics decrease military injuries.

5 yr controlled trial shows no benefit of knee arthroscopy vs. home exercise program for patellofemoral pain.

Mountainous 100-mile run produces large changes in neuro-muscular measures. But all returns to normal in 2 weeks.

Oil prices flirting with $100/barrel? That’s good news. High gas prices increase physical activity.

Dept of no surprises here: After 100-miler, runners have reduced stride length, greater stride frequency.

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

In group of runners, longer leg tendons (espec Achilles) and less joint flexibility linked to greater running economy.

Ouch! Researchers compute that weight loss-exercise programs reduce “weight-related disease burden” by only .01%.

Combined protein-carb supplement improves endurance performance among cyclists in hot, 8 day event.

In randomized trial, plyometric training helps running-after-cycling neuromotor control in some triaths. No RE boost.

Incredibly great info-graphic shows your carb needs (and more) during exercise of different lengths. Read article too.

Among elite track/field athletes, leg-length discrepancy increases risk of stress fractures.

Controlled trial finds “no evidence for the use of platelet-rich plasma injection in chronic Achilles tendinopathy.”

In prospective study w men, increases in intensive exercise linked to lower cancer death rates.

Training partners are great at any age. Here, kids who have active friends are more active themselves.

Do orthotics work? Maybe, NYTimes: Yes, two controlled 2010 studies:

After 5 yr followup, increased daily step count associated with lower bmi and better insulin sensitivity.

Too much screen time (ie, sedentary behavior) increases mortality risk, even among physically active.

Big breakfast for successful weight-loss overturned in study, not-yet-published.

Cost of obesity approaching $300 billion. Boston now has special ambulance for the obese.

Prolonged sitting is independent risk for bad health markers. More evidence, from large population sample.

When running in heat, a cooling neck collar increases endurance by 13.5 percent. Collar lowers perceived effort.

Somewhat surprising: Various running-generated forces don’t change that much with modest uphill or downhill slope.

In British military recruits, simple set of stretching & strengthening exercises reduces anterior knee pain by 75%.

Active stretching beats static stretching for hamstring flexibility, is more time efficient too.

High fitness (probably from high exercise levels) protects midlife women from weight gain. Low and mod fitness do not.

“Increased physical activity” decreases symptoms of irritable bowel syndrome.

Modest human study indicates that high fitness slows “the biological aging process.”

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

In randomized trials, “dietary composition may be the most effective lifestyle change” for metabolic syndrome.

Cancer survival: 10 prospective trials show higher levels of weekly exercise “may help to improve survival rates.”

In exercise and diet trials with greater than 10,000 subjects, results for “beneficial effects” heart health are “encouraging.”

5K race is good motivation tool to help chronic schizophrenics adhere to exercise & weight-control program.

In cross-over study, 5 days of high versus low glycemic eating = no effect on fats-carbs burn during 30 mins intense exerc.

Vigorous activity decreases cancer mortality risk of prostate cancer men by 61%.

NY Times reports on exercise-alcohol consumption link. Shared brain centers? No one quite sure.

Veggies are good for metabolic syndrome. But fitness is even better. Together, effect is large.

Don’t think, just exercise. Merely thinking about exercise could increase your calorie consumption.

Science Of Running reviews history of exercise-hydration controversy. Sides with Noakes: “Follow your thirst.”

The tide is turning: People now recommend exercise to prevent and treat arthritis.

Faster walkers live longer. Among 34,000 seniors over 65, walking speed provides a good measure of mortality risk.

Records are meant to be broken … for the next 10 yrs only. Then we’ll hit our limits, says new math analysis.

NY Times reports short, brisk walk can lower cravings, as for chocolate, junk food, etc. Many other benefits too.

Meta-analysis shows lower-leg stress fractures not linked to peak impact force but to “loading rate”–speed of impact.

Army finds that poor Y Balance Test (one-leg balancing) linked to higher injury risk. Video here.

Go ahead, get half your carbo-load calories from Omega-3 chia seeds. Works as well as 100% Gatorade.

In small running study, short sprint sessions produce results very similar to longer endurance workouts.

Diet with endurance and strength training retains 97% of muscle in overweight men, even with 20-lb weight loss.

RT Steve Magness. Alter-G treadmill reduces “muscle activity with no changes in muscle activity patterns.” Good news.

Meta-analysis shows plyometric training increases maximal strength performance. 15 sessions with 40 jumps/session.

New, simpler, better test for vo2 max in runners. Matt Fitzgerald on the same.

From “Sweat Science,” anti-depressants, especially buproprion (Wellbutrin), may improve endurance performance in heat.

Triple Ironman leads to loss of body fat and muscle mass, but not to dehydration.

Neuromuscular training reduces risk of lower limb injuries. Not a running study, but .. Mostly balance-type exercises.

In 3 Ironman sports, elite women trail elite men by 12% (swim), 15% (bike) and 18% (run). Gap expands past age 55.

BBC blames slowness of fluid-drinking marathoners on relative weight. But maybe they just stopped too long for drinks?

Cigarette smoking underutilized for endurance training. Not! But author making point about badly-done “review” papers.

Distance runners’ heart size increases over 5 yrs more than sprinters’ but only 17% vs 9% = lowest pathological level.

Analysis of 900,000 marathon/half-marathon times shows only moderate decline to 55, “mainly due to a sedentary lifestyle.”

In a sample of 643 marathon finishers, more dehydration linked to faster race times.

Note to cyclists: Save $$$, buy less, eat less to lose weight. Vs. $$$ spent on expensive lightweight bike.

Research group often critical of dehydration science says that dehydration not cause of cramping. Rather, running too fast.

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

“Physical activity during pregnancy might be successful in restricting gestational weight gain,” sometimes a problem.

Mortality data from huge Nurses study. The good stuff: exercise, nuts, polyunsat fats, cereal fiber, modest alcohol.

Rat study, but “early-life exercise” improves brain function later in life.

Exercise fights depression through same neural pathway as SSRIs (Prozac). Likely to be successful in same groups.

Deadly duo: Kids who spend more time in front of screens also eat more fat and get less vigorous exercise.

Oops, kids playing sports like soccer, baseball, don’t get as much exercise as they should.

Long index finger linked to lower prostate cancer risk. But, too bad, also less sports success.

Important to outdoor athletes: Sunscreen cuts melanoma risk. Also aspirin lowers cancer risks.

POSE pedaling technique on bike has no effect on efficiency. But POSE “bicycle setup” does.

An investigation into the “the associated health and well-being benefits that result” from distance running.

Nuts, legumes, berries, fish lower risk of metabolic syndrome. Sausage increases risk. But high fitness removes links.

Caffeine boots endurance performance in heat, as well as in cool conditions.

“Gold standard” study find no advantage of B vits or Omega-3s among heart patients trying to avoid a major event.

Review of mortality data on 1.46 million white adults followed 10 yrs finds even modest overweight increases deaths.

Not sure what this means, but light emitting diode therapy “has better potential” than cold water 4 exercise recovery.

Consensus paper on role of essential fatty acids in human nutrition, including children. Good for eyes to heart.

Unexpected science: Animals getting fatter too. Obesity highly complex. Abstract,; Comment,

Live-high, train-low works, but “accelerated erythropoiesis is not the sole mechanism” to explain the outcome.

In rats, Vitamin E and other antioxidants appear to reduce muscle mitochondrial biogenesis post-exercise.

In Italian study of 47,000 for nearly 8 yrs, high carb, high glycemic diet increases heart risks for women, not men.

USAToday reports that gerontologists say exercise is crucial for healthy, active life >65. More important than genes.

RT@SweatScience great review of maximal carb absorption during exercise. Asker Jeukendrup. Fructose + glucose.

Shoes less efficient than barefoot running (when you’re in water.) Same in air? Probably yes. But much smaller effect.

Benno Nigg always interesting. Here he finds “unstable sandals” improve golfers’ back pain w/o hurting performance.

Post-marathon study reveals: 86.7% normal sodium; 12.9% high sod (dehydrated); .4% hyponatremia. No symptoms anywhere.

Doh. It’s harder to win age group awards at the end of your 5 yr group than at the beginning.

Do you believe socks have a big effect on shock absorption while walking and running? I doubt it; and you’re right.

NYTimes “Really?” column concludes water drinking before meals modestly helpful for wt. loss, especially among seniors.

Exercise has differential effect on depression symptoms according to genetic makeup.

Only 6% of us get enough veggies. USDA spends 10% of subsidies on fruit/vegs, 55% on meat. From Marion Nestle blog.

Tim Noakes’ latest: In 9-mile march, soldiers lose 2 percent of mass without any loss of total body water.

Lower body compression garments don’t diminish run performance in heat.

In U.S. low income families often are fatter (cheap, fast-food effect). In Sudan, the opposite. Among 10-18 yr olds.

Extensive exercise of marathoners and cyclists over 60 “might be beneficial for maintaining cognitive function.”

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

Endurance exercise reduces loss of muscle mass and repair capacity usually seen with aging (in rats).

Oat bran increases glycogen loading, endurance performance, and recovery (in rats).

Carbs from a glucose-fructose bar are utilized as well during 3-hr bike exercise as same carbs from a drink.

Bad stuff can happen to athletes, but in general higher fitness lowers risk of sudden cardiac death.

Diet high in nitrates good for brain perfusion and executive thinking in older adults.

Increasing levels of total physical activity linked to more knee replacements, not hip replacements.

Genes linked to endurance performance also linked to lower decline in performance after 20 yrs.

Ten weeks of beginning running among women might be “a valuable tool in osteoarthritis prevention strategies.”

Here are the new American Heart Association guidelines for chest-only CPR. Share with many.

Back-mounted hydration system no better than canteen for healthy Air Force basic-training hydration in heat.

Hot taper improves endurance performance by 6 to 8% in hot and cool conditions. My new Peak Performance blog.

Exercise + diet trial effective for weight loss after 12 months. Early exercise boosts initial weight loss & belly fat loss.

Increases in waist circumference increase mortality. How to prevent? Oh, yeah, aerobic exercise does a decent job.

Important for exercisers who want to safeguard their friends: Compression-only CPR works well.

First study to show “aerobic fitness may relate to the structure and function of the preadolescent human brain.”

In 299 older men–av age 78, followed for 13 yrs–walking increased “gray matter” in brains, decreased cognitive loss.

Your knees on marathons–The evidence remains murky, but little evidence of serious harm. NYTimes.

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

Exercise and appetite, what’s the deal? Answer: It’s highly variable. But you get health benefits even without weight loss.

New strength-training trial ranks low weight-high rep workouts over higher weight-low rep for “acute muscle anabolism.”

Beet juice works again, this time just 2.5 hrs after drinking. Produces 4 percent decrease in 02 use.

Good study (150 young competitive female runners) finds that oral contraceptives add some muscle, not weight vs placebo.

“Science of Running” on strength training for runners. New Scientist on muscle-building research.

As walk pace drops to 13:12/mile, you switch to a run, raising calorie burn but decreasing carbohydrate consumption. Evolutionary?

Marathoners have changed heart function after 26 mile race but no arrythmias and “no ischemic injury to any chamber.”

The fittest live longest: In 20yr follow-up of 5000+ U.S. veterans, most fit have 61% lower death risk than least fit.

Cold drinks better than lukewarm for body-temp control and performance in endurance cycling test.

In 9- & 10-yr olds, fitness associated with greater volume of some brain regions and “enhanced cognitive control.”

In hot, humid Malaysia, caffeine improves endurance running performance but not heat-stress measures.

Positive addiction? In rats, aerobic exercise can reduce relapse to cocaine-seeking.

Swallowing a carbohydrate drink produces better endurance result for trained runners than rinsing and spitting the drink.

Head-hair reduces sweat rate (vs. baldness) but no other markers of heat regulation.

Pre-competition massage doesn’t improve sprint performance.

Velocity at vo2 max is best predictor of 10-mile run performance, but the other usual suspects (ie, vo2 max) are close.

Well-trained professional cyclists respond well to the strain of a 4-day competition; don’t exhibit overload signs.

Mental well-being at older ages can be enhanced through exercise.

Around the Web with Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.You can follow Amby’s tweets at and his Runner’s World blogs at and

Meta-analysis of protein added to carbs during endurance events concludes that any effect is likely extra calories.

Single dose of citrulline malate increases strength training performance and decreases muscle soreness.

Sobering news about rapid increases in U.S. obesity, and declines in health & quality of life.

Hunger and calorie consumption not affected by a 40-min walk, so it appears good way to help control weight.

“Vigorous late-night exercise does not disturb sleep quality,” but may raise heart rate during sleep.

Uninjured runners exhibit only “small alterations” in running form at end of a typical workout.

Army finds only “marginal” evidence core strength training tops bent-knee sit-ups to prevent musculoskeletal injuries.

Elite 400-meter runners might do too much high-intensity training. They need to preserve “muscle generating capacity.”

Three percent dehydration reduces strength-training performance.

Eating whole foods increases thermic effect (post-consumption calorie burn) by nearly 50% over processed foods.

Calcium pills increase heart attack risks, not proven for bone health.

Low-carb and low-fat diets produce mostly similar results, including weight loss, after 2 years.

World-class triathletes becoming more like elite runners and cyclists in vo2 max and lactate threshold.

Muscle carnosine, increased through beta-alanine supplementation, improves elite rowing performance at 2000 meters.

Large twin study suggests very high genetic heritability (72 to 85%) for tendency to exercise among adolescents.

“5 minute ice baths for recovery” produce detrimental effect for rugby players.

After a “prolonged run” at a normal pace, uninjured runners exhibit small biomechanics changes

Army tests sit-ups vs core exercise training to see which lowers back injuries. Result: No difference.

In rare, 10-week controlled test of two training methods for runners, high-intensity beats low-intensity. But barely.

Great RunBlogger review of study: conventional shoe-selection methods more likely to increase injuries than decrease.

Meat = extra body weight? Large study concludes that “a decrease in meat consumption may improve weight management.”

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

Doh science? Running a 100-mile race in Alaskan cold is stressful.

Low dose creatine supplements for 6 weeks increases high-intensity muscle endurance, not body weight.

Exercise is excellent way to maintain muscle while you lose weight through calorie reduction.

How many calories burned by an extra pound of muscle? About 4/day says Powerbar expert.

Yesterday’s big topic in running was Dathan Ritzenhein’s new running form. I gathered lots of links and comments here.

Some new equations for Max Heart Rate. They’re different for older subjects than for younger age group.

Topical NSAIDS might be good option for local muscle pain. At least they lack systemic effects of ingested NSAIDS.

At “Science of Running,” Steve Magness gives his take on genes vs 10,000 hours of practice.

For improved lactate threshold, two interval workouts a week beats one.

Amino acid supplements boost “anabolic hormone profile,” good for muscle building and recovery.

Exercise good for depression, but many depressed have low fitness. So exercise prescriptions should be very moderate.

Elite endurance athletes have lower white blood cell counts. Appears “adaptive response, not underlying pathology.”

NY Times reviews Army studies finding no link between foot types, conventional shoe selection methods and injuries.

Antioxidants don’t diminish training effect. (Is tide turning on this question?) Prev neg result.

“Systematic review” finds “limited evidence” (glass half full?) that orthotics decrease knee pains (PFPS). PT can help.

15 minutes of stretching loweres “torque production” of plantar flexor muscles before exercise.

Creatine (28 days) does not improve sprint at end of endurance cycle test. (Does a few interesting things, though.)

NY Times explores “rinse and spit” phenomenon. Sports drinks improve performance even if you don’t swallow.

Overtraining linked to rise in “proinflammatory cytokines.” Signs: “depressed mood, sleep disturbances, and stress.”

Surprising result? Unlike male Ironman triathletes, females don’t lose significant body weight over the 10-15 hrs.

Post-workout cocoa drink decreased subsequent muscle soreness but didn’t change muscle metabolic markers.

Dogs aren’t just good for adult fitness walkers. They benefit kids in the family too.

Cycling in city still a healthy idea, even taking into account air pollution and traffic-safety risks.

Another study exploring genetic link to certain soft-tissue injuries – . Previous one here –

Running shoe designs and running injuries: a psychological link? “Sophisticated” designs might raise risky behavior.

How does blood doping work? It has “multifactorial effects,” not just an oxygen boost.

In trained male runners, RE assoc’d with muscle stiffness and inversely assoc’d with lower power.

Tiny study, but low carb diet increases RPE of high intensity exercise. And diminishes performance.

Around The Web With Amby

Great stuff to ponder on your next run. A wrap up of this week’s articles on exercise science as tweeted by Amby Burfoot, Editor at Large of Runner’s World Magazine.
You can follow Amby’s tweets at and his Runner’s World blogs at and

Young marathon finishers (under 18) have no more medical problems than older adult finishers. Slightly fewer, in fact.

High glycemic index and load of foods you eat increases risk of heart disease.

The faster you are, the longer you’ll live. IE, fitness predicts heart risks.

Too much “screen time” increases metabolic risks of adolescents. But active video games are good.

For elite athlete recovery from lower-leg ligament injuries, water exercise may be best path.

The more health habits you follow, the lower your heart risks. Best: fitness, not smoking, normal bmi.

Exercise increases interleukin response (this is good) in subjects with knee osteoarthritis.

High fructose consumption is independent risk factor for high blood pressure.

One year weight loss and exercise program reduces heart risks and medical costs of subjects.

Beet juice lowers oxygen cost of exercise through “reduced ATP cost of muscle force production.”

Large, 3 yr jr. high school program manages to change diabetes risk (but not obesity) of enrolled students. From NEJM.