Place your hands on your hips and assume a staggered stance, left leg forward. Slowly lower your body as far as you can, and then jump with enough force to propel both feet off the floor. Switch legs ...

Fitness experts weigh in on this type of exercise, which involves short time periods but promises big rewards.

The shade WBGT is calculated for an environment shaded from direct (and strong reflected) solar radiation and where surfaces are not significantly hotter or colder than the indicated air temperature. ...