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KMID : 1139220200160020175
Journal of Exercise Rehabilitation
2020 Volume.16 No. 2 p.175 ~ p.182
The ratio standard is not adequate for scaling handgrip strength in judo athletes and nonathletes
Kulkamp Wladymir

Ache-Dias Jonathan
Kons Rafael Lima
Detanico Daniele
Pupo Juliano Dal
Abstract
This study aimed to analyze if the ratio standard or the allometry is the best scaling methods of handgrip strength (HGS) for body mass (BM) in judo athletes and nonathletes, and to verify if the HGS mean values are higher in judo athletes than nonathletes when the BM effect is removed. One hundred forty-two individuals, being 88 judo athletes and 54 nonathletes participated in this study. The maximal isometric HGS was measured in judo athletes and nonathletes in the preferred hand. Only the allometry method was able to remove the BM effect of HGS. The allometric exponents found for athletes was b= 0.68 and b= 0.563 for nonathletes. A common allometric exponent was identified as (b= 0.64) for comparing judo athletes and nonathletes. However, neither was able to allow for the comparison between groups due to a distortion of (bias; P< 0.01). Thus, an index (HGSINDEX) was proposed to allow within-group (judo athletes and nonathletes) and between-group (judo athletes vs. nonathletes) comparison, removing the effect of BM. In summary, the allometric exponent based on the theory of geometric similarity (b= 0.67) was able to remove the BM effect of HGS in judo athletes. An index (HGSINDEX) is suggested for classification (or rank) of the judoka in relation to the expected average of HGS.
KEYWORD
Allometry, Body dimension, Martial arts, Strength
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