unit 2 repsonse of acute excerise

Unit 2 Acute response to exercise is short term effects that exercise has on the body. Musculoskeletal response An acute response of the musculoskeletal system during exercise includes an increase in blood supply. The short term effects on your muscles increases the temperature therefore there is more activation energy so chemical reactions are used by the musculoskeletal system and the metabolic activity increases. As the oxygen demand increases, more oxygenated blood needs to be supplied to the muscles so vasodilatation occurs so more blood can pass through the arteries. This affected me during the bleep test because vasodilation allows more oxygenated blood to travel to the actively respiring muscle tissues. Other acute responses which occur to the musculoskeletal system during exercise include an increase in muscle pliability. If your muscles get warmer because of the contraction temperature is going to rise this makes them more pliable and reduces the risk of injury. Pliability is the stretchiness of the muscles. There is also an increase in the synovial fluid at the joint. The short term effects of exercise on your muscle may result in the joints become less viscous because the fluid allows a larger range of movement and pliability. The musculoskeletal response has an effect on the flexibility of the muscles during and after exercise. During exercise I got 18 cm in the sit and reach test and post exercise was 17 cm this shows that exercise has an effect on muscle pliability during acute exercise. Muscle fibre micro tears During exercise your muscles are put under stress due to constant contractions this stress can then lead to tears in the muscle fibres, if the body has the correct nutrients during recovery periods the muscle can then repair itself and become stronger this can lead to a increase in muscular endurance. During acute exercise the energy system that is used within the first 10 seconds is the creatine phosphate system