The News
Night workout racks up best performance
The Denver Post
Article Last Updated: 03/18/2007 12:52:58 PM MDT
Get up at 5 a.m., throw on some sneakers, run out the door, exercise like crazy. Sure, a predawn workout comes with some bragging rights - just don't expect your best performance. A new study suggests that late night, not early morning, is the best time to exercise, as dictated by circadian rhythms. These rhythms affect the daily production of hormones, brain activity, body temperature - and workouts.

The Research
Read the research behind this story in the Journal of Applied Physiology.