Circadian Positioning Systems is now working with the Navy to solve the thorny issue of establishing healthy circadian ...

Learn practical strategies for managing fatigue, one of the most ubiquitous and frustrating symptoms of chronic illness.

Fatigue can stem from a variety of illnesses and life stressors, but when that exhaustion lasts for months — often following an infection — it may indicate a condition called chronic fatigue syndrome.

Chronic fatigue syndrome (CFS) causes severe fatigue and cognitive difficulties without a known cure. Manage stress and know your limits to prevent CFS symptom flares. Medications and therapy can help ...

Muscle fatigue is a decreased ability to create force with your muscles. Electrolyte imbalance and overuse are some of the most common causes of muscle fatigue. Rest and massage are the best ways to ...