Physiological factor determining speed a

The following are the factors for determining speed:

• Muscle composition: The muscles which consist of more percentage of fast twitch fibrescontract with morespeed and produce a greater speed. Different muscles of the body have different pwercentage of fast twitch fibres.
• Explosive strength: it depends on the shape, size and coordination of muscles. For very quick and explosive movement, explosive strength is required. The related proportion of fast twitch fibres and slow twitch fibres determines the maximum possible speed with which the muscle can contract.
• Flexibility: It also determines the speed. Good flexibility allows maximum range of movements and also enables complete utilization of explosive strength.
• Biochemical reserves and metabolic power: muscles requires more amount of energy and high rate of consumption for maximum speed performance. For this purpose the stores of ATP & CP in the muscles should be enough. If the store is less, the working process of the muscles slows down after short time.