Un programa de entrenamiento basado en hiit mejora el rendimiento atlético de triatletas mediante la mejoras en potencia muscular

Résumé

Objective: This study aimed to examine the effect of a 5-week high-intensity intermittent training (HIIT)-based running plan on athletic performance and to compare the physiological and neuromuscular responses during a sprint-distance triathlon before and after the HIIT period. Methods: Thirteen triathletes were matched into 2 groups: the experimental group (EG) and the control group (CG). The CG was asked to maintain their normal training routines, whereas the EG maintained only their swimming and cycling routines and modified their running routine. Participants completed a sprint distance triathlon before (pre-test) and after (post-test) the intervention period. In both pretest and posttest, the participants performed 4 jumping tests: before the race (baseline), postswim, postcycling, and postrun. Additionally, heart rate was monitored (HRmean), whereas rate of perceived exertion (RPE) and blood lactate accumulation (BLa) were registered after the race. Results: No significant differences (p≥0.05) between groups were found before HIIT intervention (at pretest). Significant group-by-training interactions were found in vertical jumpingability and athletic performance: the EG improved jumping performance (~6–9%, p<0.05, effect size (ES) >0.7), swimming performance (p = 0.013, ES = 0.438), and running time (p = 0.001, ES = 0.667) during thecompetition, whereas the CG remained unchanged (p≥0.05, ES<0.4). No changes (p≥0.05, ES<0.4) wereobserved in RPE, HRmean, and BLa. A linear regression analysis showed that the change in CMJ (post-pre)predicted both the improvement in running performance (R2 = 0.559; p = 0.008) and the improvement in theoverall time (R2 = 0.391; p = 0.048). Conclusions: This low-volume, HIIT-based running plan combinedwith the high training volumes of these triathletes in swimming and cycling improved athletic performanceduring a sprint-distance triathlon. This improvement may be due to improved neuromuscular characteristicsthat were transferred into improved muscle power and work economy