Intramuscular fat stores

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Intramuscular fat stores

Postby Canuck Singh » Mon Jul 21, 2008 6:12 pm

Research continues to emerge on the differences between men and women in terms of fat metabolism. Some research shows that women metabolize more body fat during aerobic exercise than men do. However, fat doesn’t seem to melt off women as easily as it seems to for men. A recent study that examined fat metabolism differences between men and women during exercise has shed some more light on this intriguing subject.

The scientists compared 21 men and 21 women, matched to their training level, during 90 minutes of moderate intensity exercise. All subjects ate the same controlled diet for eight days before training. The women, on average, realized a 25% decrease in muscle triglyceride (fat) levels, regardless of their training experience (untrained, moderately trained or endurance trained). Compared to this, the men’s intramuscular triglyceride levels were statistically unaffected by exercise.

What does this mean? It looks as though the additional fat that women metabolize comes from fat located in muscle and not the more noticeable areas under the skin.

Ref: Am. J. Physiol: Endo and Metab. 282:E634–E642.
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