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Related Experiment Video

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Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol

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Published on: June 8, 2017

Validity of two alternative systems for measuring vertical jump height.

John S Leard¹, Melissa A Cirillo, Eugene Katsnelson

¹Physical Therapy Department, University of Hartford, Hartford, Connecticut 06117, USA. leard@hartford.edu

Journal of Strength and Conditioning Research

|December 14, 2007

Summary

The Just Jump contact mat accurately measures vertical jump height, showing high validity compared to a 3-camera system. The Vertec device also correlated well but had significant mean differences.

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Area of Science:

Biomechanics
Sports Science
Human Movement Analysis

Background:

Vertical jump height is a key functional metric in sports and rehabilitation.
Accurate measurement of vertical jump height is crucial for performance assessment and training.
Existing methods like Vertec and contact mats require validation against criterion measures.

Purpose of the Study:

To determine the concurrent validity of the jump and reach (Vertec) and contact mat (Just Jump) methods for assessing vertical jump height.
To compare these methods against a 3-camera motion analysis system as the criterion reference.

Main Methods:

Thirty-nine college students performed countermovement jumps.
Vertical jump height was simultaneously measured using a 3-camera system, Vertec, and Just Jump contact mat.
Pearson correlation and ANOVA with post hoc analysis were used for statistical comparison.

Main Results:

Both Vertec (r=0.906) and Just Jump (r=0.967) showed significant high correlations with the 3-camera system (p<0.01).
ANOVA revealed significant differences among the means (p<0.05).
Post hoc analysis indicated no significant difference between the criterion reference and Just Jump (p=0.972), but a significant difference with Vertec (p=0.005).

Conclusions:

The Just Jump contact mat is a valid tool for measuring vertical jump height when compared to a 3-camera motion analysis system.
While Vertec shows high correlation, its mean vertical jump height measurements differ significantly from the criterion reference.
The Just Jump system offers a reliable and valid alternative for assessing vertical jump performance.