Fat offers the focal fuel source for extensive period, little to moderate intensity workout such as marathons. Even in the course of great strength exercise, where starch is the key fuel foundation, fat is desired to aid access the deposited cellulose (Dijkstra, Forbes & France, 2005, p.22). Fat offers the uppermost concentration of energy of all the nutrients. The calorie concentration, along with the apparently unrestricted storing capability for fat makes fat the major backup of vitality (Dijkstra, Forbes & France, 2005, p.29). Fat breakdown commence with the hydrolysis of body fat into glycerol and fatty acids. Glycerol is transformed into a composite that can go into the citric acid sequence.
Catabolism of fatty acids endures by beta-oxidation to yield acetyl coenzyme A which also goes into the citric acid sequence (Dijkstra, Forbes & France, 2005, p.36). The body manufactures fats from fatty acids and glycerol or from complexes derived from additional glucose or from amino acids. The body can manufacture only waterlogged fatty acids while vital unsaturated fatty acids can be provided