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Muscle Fatigue Lab Report

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Words 594
Pages 3
Objective:
To demonstrate and explain muscle fatigue

Variable Choices:
Temperature (hot,neutral and cold)

Background Information:

The bones on the skeleton are caused to move by skeletal muscles. When muscles tend to contract it creates the ability of the joints to move and let us engage in physical activities. For muscles to contract, chemical energy is required. The chemical energy is a result of respiration.
The skeletal muscle is made of two different kinds of fibers: slow twitch (ST) and fast twitch (FT). Slow twitch fibers are mostly used in prolonged, because they are low and moderate the intensity activities. Slow Twitch fibers are more efficient at using oxygen to extend muscle contractions over a long time. As for the fast twitch fibers they use up more energy and the muscle fibers contract very fast. They are much better at generating short bursts of strengths and that slow. The fast twitch are usually used in short intense activities. …show more content…
In this experiment, characteristics of muscle contraction will be observed and then the effects of three factors temperature and fatigue on the action of muscles.

Question:
Will the effect of temperatures cause muscles to fatigue at a different rate of the finger lifts?

Hypothesis:
I hypothesize that if the muscle at which raises the index finger are exposed to a varying temperature then the rate of the finger lifts will increase as the temperature of the water rises, because when muscle tends to go into the low temperatures the blood vessels decrease the amount of oxygen to the muscles. While the higher temperatures dilate the blood vessels and it allows more oxygen to reach.

Controlled Variable:
The rate of the index finger lifts after being in a certain temperature Material list:

Water clothespins timer microwave ice index finger of the left hand

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