Physiological Aspects of Warming-up :
The following physiological aspects of warming-up are :
(a) Increase in Working Capacity : Due to the above-mentioned physiological adaptations the capacity to do physical work is increased. All the systems of body become efficient to do their related work.
(b) Reduces the Blood's Lactic Acid :
Research studies indicate that heart rate and consumption of oxygen are directly related to muscle temperature. Higher the temperature, higher will be the consumption of oxygen, heart rate and thus, blood's lactic acid is reduced.
(c) Increases Metabolic Rate : Warming-up increases the metabolic rate which ultimately enhances energy level. In fact, the metabolic rate increases due to rise in core temperature. If there is an increase in temperature by 0-5°C, the metabolic rate increases by 7 per cent. If the metabolic rate is higher, there will be higher production of energy.
(d) Increases the Speed of Oxygen and Fuel Transfer to Tissues : A proper warming- up increases the speed of oxygen and fuel transfer to tissues. It occurs due to the enhancement of blood flow through the muscles by dilating the small blood vessels. This improves the functional condition of a muscle by increasing its oxygen supply.
(e) Decreases the Resistance in Muscle performance.
The knowledge of sports training is essential for the coaches. Sports training is considered long term training programme which aims to improve the performance of sportsmen. It makes sportsmen psychologically and physiologically conditioned to exhibit peak sports performance. In one year, the training
Capillaries : Research studies also reveal that warming-up decreases the resistance in muscle capillaries.
(f) Increases the Speed of Nerve Impulses : Warming-up increases the speed of nerve impulses, which improves and sharpens the reaction time of sportspersons. Improvement in reaction time is always beneficial approximately in most of the games and sports.
(g) Decreases the Viscosity of Muscles :
Warming-up decreases the viscosity of muscles. Research studies indicate that if a previously inactive muscle is stimulated repeatedly, the first few contractions are often small and irregular and relaxation is incomplete. After this, the contractions become stronger and relaxation is complete. It occurs due to decrease in the viscosity of muscles. Hence, the rate of muscular contraction and relaxation becomes faster and efficient. The chances of injury or wear and tear of muscles and ligaments are reduced.
(h) Increases the Body Temperature : A proper warming-up increases the body and muscle temperature. So, it is beneficial for the sports-persons. Research studies show that if the muscles have been slightly warmed-up just before the activity, the performance is improved. Failure to warm-up before vigorous activity may lead to tearing of muscle fibres. In fact, if the muscle is warmed up, the speed with which the muscle contracts and relaxes and the force of contraction are all increased.