Effects of Black Maca supplement on isokinetics muscular performance of elite women's handball players: placebo-controlled, crossover study

초록

Background: The aim of this study was to investigate the changes in isokinetic muscular performance among female adolescent elite handball athletes with the supplementation of Black Maca (BM). Methods: Eight elite handball athletes were recruited for the present study. The intake capsules contained 2,500 mg of 100% concentrated BM extract and a placebo each, for 4 weeks. Isokinetic muscular performance and physical fitness were measured three times at 4-week intervals after the intake of BM and placebo, including baseline. Results: The one-way Analysis of Variance (ANOVA) analysis showed a significant improvement in 20 m-shuttle run (P < 0.001), 30 degrees/s flexor (P < 0.01), and 120 degrees/s flexor (P < 0.01) in isokinetic muscle function of the trunk, and 180 degrees/s right extensor (P < 0.05), 180 degrees/s left extensor (P < 0.05), and 180 degrees/s left flexor (P < 0.01) in isokinetic muscle function of the knee, after BM supplementation. Post-hoc analysis indicated that the BM group had significantly higher results compared to the baseline and placebo groups in terms of 20 m-shuttle run, 30 degrees/s flexor and 120 degrees/s flexor of the trunk, 180 degrees/s right extensor, 180 degrees/s left extensor, and 180 degrees/s left flexor of the knee. Conclusion: BM supplementation can have a positive effect on improving the performance of elite handball players who engage in high-intensity movements by enhancing their isokinetic muscle function and endurance.

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