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Related Experiment Videos

Optimum phase ratio in the triple jump

B Yu1, J G Hay

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

Journal of Biomechanics
|October 1, 1996
PubMed
Summary

Researchers developed a method to find the best phase ratio for triple jumpers to maximize jump distance. The study confirmed that individual optimal ratios exist, supporting hypotheses on velocity changes during jumps.

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Area of Science:

  • Sports Biomechanics
  • Athletic Performance Analysis

Background:

  • Optimizing athletic performance in events like the triple jump requires understanding complex biomechanical interactions.
  • Previous research has not established a definitive method for determining individual optimal phase ratios in the triple jump.

Purpose of the Study:

  • To develop and validate a method for determining the optimum phase ratio in the triple jump.
  • To identify the phase ratio that yields the longest jump distance for individual athletes.

Main Methods:

  • Kinematic data were collected from four elite male triple jumpers.
  • A significant positive linear correlation was found between horizontal velocity loss and vertical velocity gain during support phases.
  • An optimization model was created using the horizontal-to-vertical velocity conversion factor to determine individual optimum phase ratios.

Main Results:

  • The study found a significant positive linear correlation between horizontal velocity loss and vertical velocity gain during support phases.
  • An optimization model successfully determined a unique optimum phase ratio for each athlete, maximizing jump distance.
  • The model demonstrated fair accuracy in predicting actual jump distances.

Conclusions:

  • The developed method effectively determines individual optimum phase ratios for maximizing triple jump distance.
  • The findings support the hypotheses that vertical velocity gain correlates with horizontal velocity loss and that no single ratio suits all jumpers.
  • Optimum phase ratios are athlete-specific, influenced by their horizontal-to-vertical velocity conversion factor and initial horizontal velocity.

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