Lab 6: Grip Strength Comparison P URPOSE The purpose of the lab is to measure and compare grips of both hands, compare grip strength with gender and physical characteristics, and compare pinch strength of fingers and dominant hands. M ATERIALS AND M ETHODS Materials: Vernier Hand Dynamometer Methods: Each person in the group will take turns being subject and tester. Part I Hand Grip Strength 1. Connect the Hand Dynamometer to LabQuest and choose New from the File menu. 2. On the Meter screen, tap Length. Change the data-collection length to 10 seconds. Select OK. 3. Zero the readings for the Hand Dynamometer. a Hold the Hand Dynamometer along the sides, in an upright position (see Figure 2). Do not put any force on the pads of the Hand Dynamometer. b When the readings stabilize, choose Zero from the Sensors menu. The readings for the sensor should be close to zero. 4. 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° angle, with the arm unsupported (see Figure 1). 5. Have the subject close his or her eyes, or avert them from the screen. 6. Start data collection. After collecting 2 seconds of baseline data, instruct the subject to grip the sensor with full strength for the next 8 seconds. Data will be collected for 10 seconds. 7. Determine the maximum and mean force exerted by your hands during a portion of the data collection period. a Tap and drag across the data from 4 s to 8 s. b Choose Statistics from the Analyze menu. c Record the maximum and mean force in Table 1. 8. Store the data from the first run by tapping the File Cabinet icon. 9. Repeat Step 3 − 7 with the left hand. 10. Work with your classmates to complete Tables 2 − 4. Note : In Table 4, round height to the nearest inch. Part II Pinch Strength 11. Tap the Meter Tab. Tap Length and change the data-collection length to 20 seconds. Select OK.
12. Have the subject sit with his or her back straight and feet flat on the floor, holding the Hand Dynamometer along the sides in the non-dominant hand (see Figure 3). Note : No additional force should be placed on the sensor by this hand. 13. Have the subject close his or her eyes, or avert them from the screen. 14. Zero the readings for the Hand Dynamometer. a Hold the Hand Dynamometer along the sides, in an upright position. Do not put any force on the gray pads of the Hand Dynamometer. b When the readings stabilize, choose Zero from the Sensors menu. The readings for the sensor should be close to zero. 15. Start data collection. Instruct the subject to immediately pinch the end of the sensor between the pads of the thumb and forefinger of his or her dominant hand, and hold for 5 seconds. 16. Instruct the subject to switch to successive fingers every 5 seconds. Data collection will stop after 20 seconds.
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- Spring '08
- Ring finger, Hand strength, Hand Dynamometer