I know people who travel a lot on business and many times there aren’t fitness facilities available in the hotel or in the area. This is where bodyweight exercises really come in handy.

What I love about interval training most is that you can get a lot done in a short amount of time which is demonstrated below in Craig Ballantyne’s 3-minute arm workout.

People who already use interval training do so for either burning fat or for improving their athletic abilities in specific areas.

The push-up is one of those exercises that is more popularly known for being used in military physical training as a form of punishment for getting out of line. Dropping and giving 20 reps all the time actually does more good than harm.