Michael J. Joyner

Author's Bio

Michael J. Joyner, M.D., is a physiologist and anesthesiologist at the Mayo Clinic and a leading voice in the world of exercise physiology. Over the past 25-plus years, he's published hundreds of studies, many of which have focused on how humans respond to exercise. Dr. Joyner also writes at Human Limits. The views expressed in his posts are his own and do not reflect those of his employer.

The Single Fitness Stat You Need to Know

A new study in the journal Medicine & Science in Sports & Exercise suggests a reliable, yet simpler way to find your VO2 max: An online estimator using your age, weight, sex, waist circumference,...

Is Any Amount of Sugar Safe?

Sugar has become a trillion dollar health care problem. But are athletes at risk?

When Athletes Know More Than Scientists

Sometimes, what's common knowledge doesn't need scientific validation. Listen to the advice of these two legendary athletes and remember that even the strongest of us need a little rest and...

When Statins Fail—and Where Diet Succeeds

Being athletic doesn't make you immune to high cholesterol. Up to four percent of serious recreational runners manage their levels using either statins, drugs for blood pressure, or drugs for...

Why You Need a Water Appetizer

Can you lose weight just by downing a glass of water before dinner? The idea seems straightforward: You drink water before a meal, your stomach fills up a bit, so you eat less. But does intuition...

Why It's Impossible to Just Eat Less

Most people live in a low-activity, high-food “obesogenic” world, and it takes constant effort to stay active and eat smart. But why is it so easy to make the wrong decisions? One explanation is...

Are Ultra-Distance Athletes Special?

Is there something special about the physiology of ultra-distance athletes and what can we learn from how they train?

Cracking the Sub-Two-Hour Marathon

A new record has been set in the marathon, edging us 15 seconds closer to the two-hour mark. Will we get any faster?

Hill springs

When Exercise Turns Deadly

We're told to exercise to stay fit and healthy, but sometimes training routines turn deadly.

Lessons from the Boss

Not all celebrities are train wrecks. Sometimes, they're perfect examples of what we should be doing to stay healthy and happy.

Can You Get Too Much Exercise?

Too much time on the couch is deadly, but what about hours spend in the saddle or on the trail?

The Right Way to Interval Train

Interval training is no longer the secret of the pros, but that doesn't mean you're doing it right.

Exercise Will Save Your Brain

Forget about wonder drugs, a spate of new research shows that exercising today is the key to staying sharp tomorrow.

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