David John Hall Photographer || David John Hall. A sports person needs to burn fat that it consumed. High fat do not let more oxygen to the heart, brain and muscles. More fat in the body leads to less functional strength and speed of the player during the match. Fat also releases chemical or many kinds that are affective to human body and do creates insulin me excess which is bad. It increases blood pressure and are responsible for blood clotting. It even converts male hormones to f female which are not good especially for men.