Reach Height and Jump Displacement: Implications for Standardization of Reach Determination

Lucas C. Ferriera, Brain K. Schilling, Lawrence W. Weiss, Andrew C. Fry and Loren Z.F. Chiu

Purpose: To determine the influence of 4 methods of standing reach height measurement and Vertec™ jump height measurement against 2 force plate methods of jump displacement determination (impulse and flight-time methods).

Conclusions: The one-hand reach with plantar flexion (on toes) was the method of reach that was closest to the impulse and flight-time methods, and thus should be the preferred choice when using jump-and-reach tests to determine jump displacement. In all cases, the Vertec™ over estimates the displacement of the center of mass based on force plate methods.

IN PLAIN ENGLISH: A more accurate method of determining initial reach height when testing vertical jump ability is a 1-hand reach while up on the toes..

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