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Grip This Hand! Hand Position Impacts Strength

CSEF · 2013 Mammalian Biology

Taryn Clark · Terrace View Elementary, Grand Terrace, San Bernardino County

Overview

Objectives/Goals This project examines hand position and how it affects grip strength and muscle fatigue with repetative motion. Methods/Materials I used a Jamar hand dynamometer to measure grip strength in a neutral, supinated, and pronated position. Each position was tested multiple times in a rotating order. Results I found that 59% had the strongest grip strength in the neutral position, 34% in the supinated, and 4.5% in the pronated positions. There appeared to be an average 6.9% drop in performance in all positions after fatigue set in. Conclusions/Discussion There were clear performance differences in grip strength determined by habd position.

Summary statement

This project examines hand position and how it affects grip strength and muscle fatigue with repetative motion.

Competition history

  • CSEF 2013 Mammalian Biology · Entry J1299

Resources

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Source: California Science & Engineering Fair public projects

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