Glen Barrentine

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Watch: 'Barefoot Running Professor' on Colbert Report

Daniel Lieberman discusses running form and more.<p>Daniel Lieberman, the Harvard professor known as the "barefoot running professor," was on Thursday night's "Colbert Report."<p>As the clip below shows, Lieberman discussed--as best he was able amid a Colbert fussilade--how being good at sweating helps …

Simple Truths About 180 Strides/Minute

It’s not a magic number; you have to know your goals.<p>It seems that I can’t turn around without reading another article about runners aiming for 180 strides per minute, or at least for an increased stride turnover. Many recreational runners are probably in the 160s, and have gotten the message that …

High Fruit and Vegetable Consumption May Lengthen Life

In large study, people who ate the most fruits and vegetables died later.<p>People who eat more fruits and vegetables have a lower risk of death, especially from cardiovascular disease, within a given time period, according to data from the European Prospective Investigation into Cancer and …

Should I Eat Breakfast on Race Morning?

I usually run on an empty stomach in the early morning.<p><i>Hello,</i><p><i>I am 42 years old and just started running about three months ago. I try to train at least two or three times a week with a half-hour run. I ran my first 5K in December and finished in 26:29. I only have time to train when I get up at</i> …

Fitness and Attention Span

Does being active make you better at sitting still and staying focused?<p>This is a pretty neat graph, from a recent Spanish study in <i>PLOS ONE</i> that explores the links between cognitive performance, physical fitness, and autonomic nervous system function (press release here):<p>The graph is simpler than it …

Why Do My Calf Muscles Cramp When I Run?

Causes could be muscles fatigue, dehydration or other syndromes.<p><i>Doc- Hope you can give me some advice on this. I have been experiencing cramps/spasms in my calves for about two years now. I am 43, and have been running competitively since I was 11. I never had these issues until I ran my first</i> …

How Many Heart Beats Do We Get?

A Danish study finds higher resting heart rate predicts mortality risk, independent of fitness.<p>It's a question that every runner is asked at some point: "Aren't you afraid you're using up all your heart beats by exercising so much?"<p>First of all, for the record, let's just do some simple math. Let's …

Heat Stress, Plasma Volume, and the Benefits of Dehydration

Is heat training the new altitude?<p>I'm at the annual scientific meeting of the Canadian Academy of Sport & Exercise Medicine right now -- lots of interesting talks and fun topics. My favorite from this morning was a talk in the Wilderness Medicine session called "14 Uses of a Foley Catheter," on …

New Runners Don't Self-Select Best Stride Rate

In study, increasing stride frequency leads to more economical running.<p>Running is a natural activity, but that doesn't mean we all automatically run in the most efficient way. Consider, for example, a study published in the <i>European Journal of Sports Science</i>. It found that, when new runners were …

Should I See My Doctor?

How to tell the difference between uncomfortable and injured.<p><i>About 6 months ago I started training for my first 5K. A couple weeks into training I was having pain in my third toe on my left foot and my foot was going numb while running. I was training about 3-5 miles four times a week. I stopped</i> …

How Training Partners Boost Health

Running’s health benefits likely amplified when we log miles with others.<p>Training partners can push us to new paces and longer workouts. But perhaps the greatest benefit of running with others is the camaraderie, particularly as we get older.<p>That's the takeaway of two separate but related studies …

Avoid Pollutants for Breathing No Matter Where You Live

The quality of air you inhale when you run affects your body and brain.<p>Research links vigorous exercise with improved memory, mood, and mental clarity. But a new study in Medicine & Science in Sports & Exercise reports that running in a polluted urban area could diminish the positive brain boost …

Gluten-Free Meals for Better Running

Get all the carbs you need in delicious, easy-to-make dishes.<p>Pasta, bagels, and bread have long been the go-to energy source to fuel workouts. Runners who stop eating wheat–going gluten-free for health or diet reasons–lose out on not only easy carbs but other key nutrients, such as fiber and B …

That Pre Thing

Any debate regarding Steve Prefontaine’s merits as an all-timer should begin with these numbers.<p>0 Defeats in cross country or track during Pre’s junior and senior high school seasons<p>19 Pre’s age when he appeared on the cover of <i>Sports Illustrated</i> in 1970<p>3 NCAA Cross Country Championships won while …