We do it when we're tired, when we're bored or when we're hungry; parachutists have been seen to do it before a jump, and research has even suggested a link between yawning and sexual arousal. But the ...

Tiredness, sleep deprivation, or certain medications usually cause yawning. If you find yourself yawning much more than usual on a daily basis, there could be more than tiredness or boredom going on.

Mark A. W. Andrews, associate professor of physiology and director of the Independent Study program at the Lake Erie College of Osteopathic Medicine, provides the following explanation. Although not ...

Stretching after waking feels so pleasant for the same reason it does for cats, but not everyone enjoys the benefits The stretching you do after waking isn’t really stretching. It is a process ...

Dear Dr. Gott: I am disabled with extensive nerve damage from liver failure. I have a lot of problems. Just in the past few months, I've had spells where I yawn constantly. The problem usually starts ...

Yawning is an involuntary action that may help regulate brain temperature, increase oxygen intake, and improve alertness. It is also contagious, linked to empathy and social bonding in both humans and ...

Yawning may seem like a normal way to show that you're tired or bored, but it can sometimes tell you more about your health than you think. Sometimes yawning is normal, but yawning a lot could mean ...

Sometimes even your best-laid exercise plans go awry. A crappy commute, substandard sleep or other stressors can make you feel both wired and tired, unable to either gear down or gear up for exercise.