High-intensity interval training can help you get fit with shorter, harder workouts. CNN's Dr. Sanjay Gupta reports.
- high-intensity interval training can help you improve or get fit more quickly.
- interval training example is 1 minute high intensity, 1 minute rest, 1 minute high intensity, 1 minute rest ..
http://cnn.com/video/?/video/health/2010/03/16/am.fitnation.get.fit.quicker.cnn