Influence of weight reduction on physical performance capacity in judokas
Journal Title: Journal of Combat Sports and Martial Arts - Year 2010, Vol 1, Issue 2
Abstract
[b]Introduction.[/b] Physical performance capacity in judokas was investigated before and after weight reduction.[b]Material and methods.[/b] Twenty-two judokas volunteered to take part in the experiment and were tested before and after weight reduction. Body weight and body fat percentage was measured before and after weight reduction. Food intake before and during the weight reduction period was recorded. Reaction time was measured by means of a jump test, using the Optojump system (Microgate – Italy). Isometric arm strength was measured by tensiometry using a 40 seconds procedure. Anaerobic endurance was tested using a repeated jumping procedure.[b]Results.[/b] After the experimental procedures subjects were divided in a high weight reduction group (≥3% BW, n=11) and a light weight reduction group (<3% BW, n=11). In the high weight reduction group (HWRG) body weight changed from 72.0± 12.3 kg to 69.0±11.8 kg, (p<0.001). In the light weight reduction group (LWRG) body weight changed from 66.6±8.6 to 65.7±8.4 kg, (p=0.001). Both groups showed very low carbohydrate intakes during the weight reduction period. Reaction time improved in one out of the three reaction tests for the HWRG (p<0.05). In the HWRG total isometric strength and isometric strength as measured during the 2nd maximal effort of the 40 s procedure, decreased significantly (p<0.05).[b]Conclusions.[/b] Only in the HWRG isometric strength was influenced negatively by the weight reduction procedure. Anaerobic performance was not influenced by the weight reduction procedure.
Authors and Affiliations
Peter Clarys, Kim Ramon, Friso Hagman, Evert Zinzen
Keywords
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