92486
Descrição
FlashCards por alexlpeart, atualizado more than 1 year ago
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Criado por alexlpeart
aproximadamente 11 anos atrás
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| Questão | Responda |
| Give 5 factors affecting range of movement at a joint. | Age, Gender, Genetics, Posture and disease. |
| When can flexibility become a problem causing increased risk of injury? | We when become hyperflexible |
| What is osteoporosis? | Loss of bone mineral density |
| What is lordosis? | A forward concave of the spine |
| What is scoliosis? | An abnormal lateral curve of the spine. |
| What can muscle looseness do to muscles performance? What relationship proves this? | Decrease efficiency. The negative correlation between the sit and reach test and running efficiency. |
| What is the effect of increased muscle compliance on sprinting ability? Suggest a potential reason why this might be the case? | Increased muscle compliance is associated with increased sprinting ability. might be due to increased muscle compliance means less risk of injury so more time training. |
| What happens to muscles that are fixed at a shortened length? e.g. when they are in plaster cast? | They lose sarcomeres so become shorter |
| Explain what happens when we increase sarcomeres length in relation to muscle power. | We increase power, this is because the distance the sarcomeres shorten over the same period of time is greater therefore the velocity of contraction is greater and velocity determines power. |
| Explain how a countermovement can increase the height of a vertical jump. | A countermovement is a movement in the opposite direction in order to activate the muscle before a movement. It gives time for the muscle to activate, forming cross bridge links. If we relax the muscle this elastic energy is released. |
| Explain what happens the the muscle tendon complex during isometric contraction. | Our muscle in not totally stationary. We contract the muscle at the expense of the tendon stretching meaning the overall position does not change but the muscle gets a little shorter and the tendon a little longer. |
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