Show contestants put in at least 90 minutes of daily high-intensity exercise (plus several hours of low-intensity activity).

In the 1970's, people were told that high-intensity aerobic exercise was necessary.

Improving the athletic performance of young, healthy people during brief, high-intensity exercise such as sprinting.

Regular high-intensity exercise is also a known cause of delayed puberty.

In fact, it will do even better than high-intensity exercise, Dr. Flatt said.

Ergogenic aids are any external influences that can be determined to enhance performance in high-intensity exercises.

Also, long-term, high-intensity exercise suppresses the immune system, the Austrian researchers write.

But caffeine doesn't seem to help with short-term, high-intensity exercise such as sprinting and lifting.

That's because every time you do high-intensity exercise, your metabolism stays revved for an hour or more afterward.

Is a long-term, high-intensity exercise program effective and safe in patients with rheumatoid arthritis?