Team McCallum

R&D for Lifetime of Life

Lost sleep = weight gain.

Dr Laurent Brondel found that young, lean men gained weight after a night when sleep was restricted from 8 hours to 4.

Previous studies have shown that a shortage of sleep increases ghrelin, the hormone that stimulates hunger, and decreases leptin, the hormone that suppresses appetite. Brondel wanted to see what happened to food intake and activity in healthy men in their early-20s.

When sleep was cut to 4 hours, the calories eaten during the day went up by 22%. Physical activity also went up, but by less than the food increase, leading to a net weight gain.

Brondel’s study was both short term and small scale, but adds to similar findings in other types of people.


April 15, 2010 - Posted by | Activity, Diet, Laurent Brondel, Sleep, Weight management

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