Muscle Contraction Theory

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In this study, three volunteered subjects with the same age (19) and different in body weight (43, 50, and 85 kg) were challenged to obtain the skeletal muscle biomechanics data by measuring moment force from maximum weight that the subject can hold on certain angles (20o, 45o, 60o, 90o, and 120o), moment arm, and resistance arm during muscle contraction. The result shows that the average maximum of weight that each subject can hold for certain angles varies. The weight was increased from 20o to 90o and decreased in 120o. The number of weight, moment arm, and resistance arm were used to determined the number of moment force by using the formula. The amount of moment force is increasing from 20o to 120o. In 90o, the moment force is 0 because the moment arm is 0. Based on the formula the result will be 0. From a histological point of view, when a person lifts an object, an increase in amount of calcium in muscle fiber would trigger its contraction. The calcium originated from the sarcoplasmic reticulum, because the muscle’s action potential propagating along sarcolemma and into T tubules resulting in the opening of the sarcoplasmic reticulum membrane Ca2+ release channels. Ca2+ would

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