Suplemento de creatina y rendimiento en 6 carreras consecutivas máximas de 60 m

Abstract

Creatine is an ergogenic aid used in individual and team sports. The aim of this study is to analyze the effect of monohydrate creatine supplementation on physical performance during 6 consecutive maximal speed 60 meter races, and the changes induced in some characteristic biochemical and ventilatory parameters. The study was carried out on nineteen healthy and physically active male volunteers, and randomly distributed into two groups: Group C received a supplement of creatine monohydrate (20 g/day for 5 days) and group P received placebo. Tests were performed before and after supplementation. No significant changes were observed in weight or body water measured by bioimpedance or the sum of 7 skinfold or performance during the 60 meter races. Group C showed a statistically significant increase in plasma creatinine from 69.8 +/- 12.4 to 89.3 +/- 12.4 micromol x L(-1) (p<0.05). In group C in the second control day (after creatine supplementation), expiratory volume V(E), O2 uptake and CO2 production were lower after 2 minutes of active recovery period. These results indicate that creatine monohydrate supplementation does not appear to improve the performance in 6 consecutive 60 meter repeated races but may modify ventilatory dynamics during the recovery after maximal effort.

Creatine supplementation protocols with or without training interventions on body composition: a GRADE-assessed systematic review and dose-response meta-analysis

“…Evaluating the general risk of bias mentioned 111 studies with a low risk of bias [ 32 , 33 , 36 , 38–40 , 42–46 , 48 , 49 , 51–57 , 60–62 , 64–66 , 68 , 69 , 72–74 , 76 , 77 , 79–81 , 84–86 , 90–94 , 96–109 , 111–120 , 122–129 , 131 , 132 , 134–140 , 142–145 , 147–150 , 152–155 , 158–163 , 165–168 , 170–173 ], 17 studies with a high risk of bias [ 34 , 37 , 41 , 47 , 58 , 70 , 71 , 78 , 82 , 87 , 88 , 121 , 141 , 151 , 156 , 157 , 169 ], and the others indicated an unclear risk of bias [ 9 , 35 , 50 , 59 , 63 , 67 , 75 , 83 , 89 , 95 , 110 , 130 , 133 , 146 , 164 ] ( Table 2 ).…”

The effects of creatine supplementation: A review with special regards to ballgames

“…CS may result in lower (2,5,8,93), similar (6,15,18,20,21,31,45,59,87,89,105,111,113) or higher (44,112,123) blood-lactate levels after high-intensive exercise when compared to the control group. Lower concentrations may be the result of an increased anaerobic-alactic potential and a delayed start of the anaerobic glycolysis (5,8).…”

“…Only a few studies do not share these findings (12,25,38). Research studies examining the effects of creatine on weightdependent activities, such as running or swimming, are less convincing (18,20,47,59).…”

“…Most of the ballgames are typical high-intensive intermittent exercises and thus correspond to the exercise modes on which creatine supplementation (CS) might have an ergogenic effect (126). On the other hand, research studies examining the effects of creatine in weight-dependent activities are less convincing (18,20,47,59,88,94), which can be explained by an initial body mass increase as a result of water retention (61). Up to now, there is a considerable lack of specific applied research regarding the effect of CS, particularly in the area of ballgames.…”

Radiosensitivities of creatine and creatinine: an ESR study

“…Creatine has become popular in the nutritional supplement industry due to its importance in assisting the body in regenerating readily available energy stores via ATP synthesis [1][2][3][4][5][6]. Creatine supplementation has been demonstrated to be effective in increasing peak force and peak power during short-duration high-intensity activity but to have no effect on endurance [7][8][9][10]. The main dietary source of creatine is red meat.…”