For women, a significant sign of exercising too much is the loss of a regular menstrual cycle. “The menstrual cycle changes ...

“Exercise doesn’t have to mean an hour at the gym. It can be three minutes here and five minutes there,” says Dr. Grant.

For people who don’t already exercise, short bursts of deliberate activity significantly improved cardiorespiratory fitness.

When we lose weight, our resting energy expenditure decreases by more than you would expect for the amount of weight lost.

Scientists have found the first compelling evidence that cognitive training can boost levels of a brain chemical that ...