There is a definite relationship between our core body temperature and our feelings of lethargy or energy. When the body is warm, we feel wide awake. When the body is cool, feeling of tiredness and sleepiness prevail.

Not everybody realizes that our body temperature works and ticks like an internal clock controlling our sleeping cycles. Body temperature also controls the metabolism, circulation and other involuntary activities our body undertakes.

It's also extremely important to understand that the rise and drop of body temperature is one of the mechanisms for our body to produce the feelings of being awake or being tired.

Simply put, whenever your body temperature begins to fall, you will feel tired, lethargic, and drowsy. Whenever your body temperature rises, you will feel more energetic, alert and be able to focus better.

The rise and fall of body temperature during the day should not be misinterpreted as the need to rest or sleep. This happens many a times during the day depending upon the body