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Original articles  SPORT NUTRITION AND SUPPLEMENTATION 

The Journal of Sports Medicine and Physical Fitness 2003 December;43(4):488-92

Copyright © 2009 EDIZIONI MINERVA MEDICA

language: English

Effects of high dose oral creatine supplementation on anaerobic capacity of elite wrestlers

Koçak S., Karli Ü.

Physical Education and Sport Department, Middle East Technical University, Ankara, Turkey


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Aim. The pur­pose of ­this ­study was to inves­ti­gate the ­effect of ­high ­dose ­oral crea­tine sup­ple­men­ta­tion on anaer­obic ­capacity of ­elite wres­tlers.
­Methods. Experi­mental ­design: com­par­a­tive ran­dom­ized ­design.
Set­ting: Win­gate anaer­obic ­tests of the par­tic­i­pants ­were ­taken at the ­Human Per­for­mance Labor­a­tory of the Depart­ment of Phys­ical Edu­ca­tion and ­Sports in The ­Middle ­East Tech­nical Uni­ver­sity, ­Ankara, ­Turkey. Par­tic­i­pant: 20 ­active inter­na­tional ­level wres­tlers par­tic­i­pated (22 to 27 ­years old). Inter­ven­tions: the ­daily ­dosage of crea­tine or pla­cebo was ­divided ­into 4 ­equal ­amounts (5 gx4 = 20 g). ­Every 5 g of sup­ple­ment was dis­solved in 250 ml ­water and it was ­given to par­tic­i­pants 1 ­hour ­before break­fast, ­lunch, ­dinner, and ­workout ses­sion. Meas­ures: sub­jects under­went a 30-s Win­gate Anaer­obic ­tests ­until exhaus­tion in pre- and ­post-­tests. ­After the ­pretest meas­ure­ments ­were com­pleted, par­tic­i­pants ­were clas­si­fied as crea­tine (Cr., n=10) and pla­cebo (Pl., n=10) ­groups ­with ­regard to ­their ­average anaer­obic ­power ­scores ­obtained ­during the ­test.
­Results. ­Results of ­paired “t”-­test ­revealed ­that ­there was no sig­nif­i­cant ­change in pla­cebo ­group ­between pre- and ­post-­test in ­average and ­peak anaer­obic ­power. How­ever, ­average and ­peak ­power ­mean ­scores ­obtained ­from ­post-­test (8.123±0.448 W/kg and 10.523 ±1.004 W/kg) ­were sig­nif­i­cantly (p<0.01) ­higher ­than ­pretest (7.233±0.483 W/kg and 8.992± 0.665 W/kg) for crea­tine ­group. ­Results of the inde­pen­dent “t”-­test ­also indi­cated ­that the ­mean ­gained ­scores of crea­tine ­group in ­average and ­peak ­power ­were sig­nif­i­cantly ­higher ­than pla­cebo ­group (p<0.01).
Con­clu­sion. ­This ­study dem­on­strates ­that ­short-­term ­high ­dose ­oral crea­tine sup­ple­men­ta­tion has an ergo­genic ­effect on anaer­obic ­capacity of ­elite wres­tlers.

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