Hard short workouts are best

I found a couple of posts around the internet that spoke of a study at McMaster University that showed that hard exercise for a shorter period of time is better than a long workout at a lower level of intensity. I found the article at the Journal of Physiology but you really need to be a scientist to decipher what they have to say.

When it comes to cardio exercise, less appears to be more.

That’s the conclusion of researchers who discovered that extremely short bouts of high-intensity exercise produce the same improvements in muscle health as longer, more moderately paced workout sessions.

In the two-week study, published in this month’s issue of the Journal of Physiology, 16 college-age men, all recreational exercisers, were asked to exercise on stationary bicycles three times a week. One group cycled for 30 seconds all-out, followed by four minutes of recovery, or pedaling at a slower speed while keeping the heart rate somewhat elevated. They repeated that several times for a total of about 20 minutes a day. The other group cycled at a moderate pace for 90 to 120 minutes a day.

At the end of the study, the men’s muscles were tested for an enzyme that’s “an indicator of the muscle’s ability to use oxygen,” says lead author Martin Gibala, associate professor of kinesiology at Canada’s McMaster University. In both groups, the enzyme level increased by about 25% to 30%. He adds, “You can think about that as being able to produce energy more efficiently, being able to go at a faster pace and exercise longer.”
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