An interventional study of creatine supplementation and aerobic exercise training in Renal Insufficiency, sponsored by University of Sao Paulo. Completed at 1 site in Brazil. Open to male participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2007-04-24.
Sponsored by University of Sao Paulo · Not applicable, Interventional, and Prevention
Creatine (CR) supplementation is commonly used by athletes. However, its effects on renal function remain controversial. The aim of this study was to evaluate the effects of creatine supplementation on renal function and oxidative stress in healthy sedentary males (18-35 years old) submitted to exercise training. Our hipothesis is that creatine supplementation does not affect renal function in this population.
Creatine (CR) supplementation is commonly used by athletes. However, its effects on renal function remain controversial. Purpose: The aim of this study was to evaluate the effects of creatine supplementation on renal function and oxidative stress in healthy sedentary males (18-35 years old) submitted to exercise training. Methods: Subjects (n = 18) were randomly divided in two groups and were allocated to receive treatment with either creatine (CR) (\~10g • day-1 over three months) or placebo (PL) (dextrose). All subjects undertook moderate intensity aerobic training, in three 40-minute sessions per week, during 3 months. Serum creatinine, TBARS, serum and urinary sodium and potassium were determined at baseline and at the study endpoint. Furthermore, cystatin C was also assessed prior to training (PRE), after 4 (POST 4) and 12 weeks (POST 12). Results: There were decreased in both oxidative stress (evaluated by TBARS - µM/24 h) (PRE CR: 8.2 4.4; PL: 6.4 0.8 vs. POST 12 CR: 2.5 1.8; PL: 2.1 1.6, p=0.0001) and cystatin C levels (mg/L) (PRE CR:0.82 0.09; PL: 0.88 0.07 vs. POST 12 CR: 0.71 0.06; PL: 0.75 0.09, p=0.0001) over the time, suggesting an increase in glomerular filtration rate. There were no significant differences between groups in other renal parameters investigated. Conclusions: These data indicate that high-dose creatine supplementation throughout three months does not provoke renal dysfunction in sedentary healthy males urdergoing aerobic training. Moreover, our results suggest that moderate aerobic training per se could improve renal function.
1,995 studies on the registry are indexed under Renal Insufficiency; 173 are open to participants now.
This study's enrollment of 18 is below the median of 43 across 1,504 interventional studies indexed under Renal Insufficiency.
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University of Sao Paulo