974 Words4 Pages

Aim: To examine how a force that a muscle can exert, is effected by factors which are raised from the molecular structure of skeletal muscle. This was obtained by recording the maximum weight that biceps muscle can hold at varies joint angles, exploring the relationship between force and velocity during multi-joint and multi-muscle activities and finally by measuring the length-tension relationship from active to passive insufficiency.
Methods: Pages 5, 12, 13 and 14 of the revised lab manual handout.
Results:
Experiment 1:
The experiment was conducted with subject’s arm in upright and horizontal positions at different angles. Subject was required to hold varies weights without moving from her initial position. At each angle, further weight was added until the subject could no longer hold.
Note: The results were obtained as a part of a group. The subject was Crystal Wang.
The following graph illustrates the relationship between Maximum weight held at it’s related angle in upright and horizontal positions. It can be seen from the graph that both positions follow the same trend between maximum weight and its angle. As the angle increases, greater weight can be held. However, the value of the weights are greater in body its upright position.
Experiment 2:
To explore the force-velocity relationship, experiment 2 was conducted in two parts: In part A this relationship was investigated during maximal muscle contractions and in part B it was observed during a multi-joint and multi muscle activity while exercising on a wattbike.
Note: The results were obtained as a part of a group. The test subject was Solmaz Niagansafi.
It can be seen from the results that velocity decreases with an increase in weight or difficulty.
Similar trend is observed from the table 4.When the weight or resistance was increased, it became more difficult for the

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