Dr. PenevDo not trade sleep for exercise. You need both to be healthy.

“In a 2004 study, men limited to only four hours of sleep a night reported increased appetite and showed hormonal changes consistent with increased hunger…sleep loss can wreak havoc with a person’s endocrine system, the hormones that control appetite and metabolism.”

Cutting back on sleep, a behavior that is ubiquitous in modern society, appears to compromise efforts to lose fat through dieting.

In our study it reduced fat loss by 55 percent.

Dr. Plamen Penev, MD
University of Chicago
School of Medicine

In a new study of two groups following the same diet and exercise routines weight loss was the same but the group with adequate sleep lost fat while the sleep deprived participants lost muscle or bone.

Burn Off More Fat with More…Sleep?
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University of Chicago Medical Center