The Effect of Height and Hand Dominance of an Individual on Grip Strength.docx - I The Effect of Height and Hand Dominance of an Individual on Grip

# The Effect of Height and Hand Dominance of an Individual on Grip Strength.docx

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I. The Effect of Height and Hand Dominance of an Individual on Grip Strength II. Introduction The objectives that will be carried out in this experiment are to obtain graphical representation of the electrical activity of a muscle, associate muscle activity with the movement of a joint, and to correlate muscle activity with height and dominance. These objectives will be carried out by using the readings of a Vernier Hand Dynamometer, which is used to measure grip strength, pinch strength, and perform muscle fatigue studies. Muscle tissue maintains electrical imbalances, or potentials, across cell membranes by concentrating positive or negative charges on opposite sides of these membranes. When activation ions are allowed to cross the muscle cell membranes, electrical activity will be generated and graphed . Once experiment is completed the difference between the minimum and maximum values of grip strength will be calculated. I hypothesize that the grip strength of every individual will be stronger in their dominant hand than their non- dominant hand, also the taller the individual the stronger they will be. Once the exper is complete the difference between the minimum and maximum value of grip strength are calc for each of the following groups III. Materials - Computer - Vernier computer interface - Logger Pro - Vernier Hand Dynamometer IV. Methods Part 1 Hand Grip Strength 1. Connect the Hand Dynamometer to the Vernier computer interface. Open the file “16a Compare Grip Strength” from the Human Physiology with Vernier folder. 2. Zero the readings for the hand dynamometer a. Hold the Hand Dynamometer along the sides, in an upright position (see Figure 2). Don not put any force on the pads of the Hand Dynamometer. b. Click the Zero button 3. Have the subject sit with his or her back straight and feet flat on the floor. The Hand Dynamometer should be held in the right hand. The elbow should be at a 90 degree angle, with the arm unsupported (see Figure 1). 4. Have the subject close his or her eyes, or avert them from the screen. 5. Click the collect button to begin data collection. After collecting 2 s of baseline data,
instruct the subject to grip the sensor with full strength for the next 8 s. Data will be collected for 10 s. 6. Store this run by choosing Store Latest Run from the Experiment menu.