Before going for strenuous exercises warm up exercises are necessary. Warm up exercises relieves stress and prevents from injury. Warm up exercises such as walk for few minutes, tread mill for few minutes is good before going for strenuous activities. If you are going for a run or brisk walk start up with warm up exercise is good. Warming up also increases your heart rate slowly and breathing to ease your body into exercising. Even before you dance start slowly and gradually increase intensity. Warm up makes your body flexible. Suddenly stopping strenuous activities are also not good so slowly stop your activity and so cooling down is also important.