December 10, 2008
Exercise Changes Appetite Hormone Levels

Aerobic exercise more powerfully suppresses appetite than non-aerobic exercise.

A vigorous 60-minute workout on a treadmill affects the release of two key appetite hormones, ghrelin and peptide YY, while 90 minutes of weight lifting affects the level of only ghrelin, according to a new study. Taken together, the research shows that aerobic exercise is better at suppressing appetite than non-aerobic exercise and provides a possible explanation for how that happens.

This line of research may eventually lead to more effective ways to use exercise to help control weight, according to the senior author, David J. Stensel of Loughborough University in the United Kingdom.

Ghrelin and peptide YY have opposite effects on appetite.

There are several hormones that help regulate appetite, but the researchers looked at two of the major ones, ghrelin and peptide YY. Ghrelin is the only hormone known to stimulate appetite. Peptide YY suppresses appetite.

Think of this research as part of a drive to simulate the effects of exercise as a substitute for real exercise. By discovering all the changes that exercise causes in the body scientists can pinpoint all signaling systems in the body that will have to be tweaked in order to emulate the effects of exercise. Want the weight-losing effects of exercise? You'll need to boost peptide YY and lower ghrelin for starters.

Share |      Randall Parker, 2008 December 10 10:57 PM  Brain Appetite

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