Are variations in running economy in humans associated with ground reaction force characteristics?

It was hypothesized that certain ground reaction force (GRF) variables are positively correlated with running economy (RE; the aerobic demand at a single speed of running). Excessive momentum changes, quantified by linear impulse measures, as well the free moment applied to the running surface could...

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Bibliographic Details
Published in:European journal of applied physiology 2001-05, Vol.84 (5), p.438-442
Main Authors: Heise, G D, Martin, P E
Format: Article
Language:English
Subjects:
Adult
Biomechanical Phenomena
Biomechanics
Exercise
Fitness equipment
Foot - physiology
Force
Humans
Male
Metabolism
Oxygen Consumption
Physical fitness
Running
Running - physiology
Stress, Mechanical
Ventilation
Warm up (exercise)
Weight-Bearing
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Summary:It was hypothesized that certain ground reaction force (GRF) variables are positively correlated with running economy (RE; the aerobic demand at a single speed of running). Excessive momentum changes, quantified by linear impulse measures, as well the free moment applied to the running surface could be considered potentially wasteful efforts in terms of metabolic energy requirements. Recreational runners (n = 16) ran on a treadmill at 3.35 m.s-1 for physiological measurements and overground for biomechanical measurements. Correlation coefficients were calculated between RE and total vertical impulse (TVI), net impulses in three orthogonal directions, and descriptors of the free moment. The TVI and the net vertical impulse were the only GRF characteristics significantly correlated to RE (r = 0.62, r = 0.60, respectively). Greater overall muscle support requirements during ground contact, as represented by TVI, may have been responsible for greater aerobic demand.
ISSN:1439-6319
1439-6327
DOI:10.1007/s004210100394