Is it okay to skimp on sleep in order to fit in a workout?

If you are cutting back on your sleep on a routine basis, then the answer is no. In most cases, people are exercising to stay fit and trim. Lack of sleep can result in just the opposite. Insufficient sleep is associated with weight gain, impaired glucose metabolism and cardiovascular stress. It also weakens athletic performance and makes you much more vulnerable to injury. Several recent studies have demonstrated how athletic performance is directly related to sleep.

Another thing to keep in mind is when you want to work out. If it is close to bedtime, it will affect your ability to fall asleep. If it is early in the morning, before you usually wake up, it may cut into your REM sleep and can have adverse consequences.