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Horizontal-to-vertical velocity conversion in the triple jump.

¹Division of Physical Therapy, The University of North Carolina at Chapel Hill, 27599-7135, USA.

Journal of Sports Sciences

|June 11, 1999

Summary

Elite triple jumpers lose horizontal velocity as vertical velocity increases during each support phase. This relationship is linear, with the horizontal-to-vertical velocity conversion coefficient indicating sensitivity to technique optimization.

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Area of Science:

Biomechanics
Athletic Performance

Background:

Understanding horizontal-to-vertical velocity conversion is crucial for analyzing triple jump techniques.
This conversion impacts performance in various jumping events.

Purpose of the Study:

To investigate the effects of specific factors on horizontal-to-vertical velocity conversion in elite triple jumpers.
To quantify the relationship between horizontal velocity loss and vertical velocity gain during the support phase.

Main Methods:

Collected three-dimensional kinematic data from ten elite triple jumpers over multiple trials.
Calculated the loss in horizontal velocity and gain in vertical velocity for each support phase.
Analyzed the relationship between these velocity changes using linear regression.

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Main Results:

A linear relationship was identified between the loss in horizontal velocity and the gain in vertical velocity.
The horizontal-to-vertical velocity conversion coefficient (A1) quantifies this relationship.
Increased vertical velocity gain led to a greater loss in horizontal velocity, with sensitivity increasing with higher A1 values.

Conclusions:

The horizontal-to-vertical velocity conversion in the triple jump is a predictable linear function.
The conversion coefficient (A1) is a key metric for assessing technique efficiency.
Further research into optimal triple jump techniques is warranted based on these findings.