Interval Training : This training method is very useful for development of endurance under aerobic conditions. Through this method we can make more rapid improvement in maximum oxygen utilization capacity than by long and steady running method. This method is based on cardio¬vascular adjustment and is based on the principle of efforts, recovery and effort again. The recovery period in between efforts, helps an athelete to recover from increased respiratory rate, blood pressure and accumulation of waste product such as carbon dioxide and lactic acid etc. In this training, the intensity of the effort should be such that the heart beating rate rises to about 180 beats per minute.