Efeitos do treinamento intervalado de sprints, da suplementação com probiótico e da interação entre ambos sobre o desempenho físico, parâmetros fisiológicos e clínicos

Abstract

Aim: This study verified the effects of sprint interval training (SIT), supplementation with probiotic (Saccharomyces boulardii), and the interaction between both on the physical performance, physiological and clinical parameters of physically active individuals. Methods: 31 volunteers (24 men and 7 women) were divided into four groups: placebo without training (NT-PLA, N = 8), placebo and training (T-PLA, N = 8), probiotic supplementation without training (NT -Sb, N = 8), and probiotic supplementation and training (T-Sb, N = 7). Before and after the intervention period (6 training sessions distributed over two weeks), the volunteers performed an incremental test until they were fatigued and a 20-km time trial, both on a cycle ergometer. Results: During the training sessions, there were significant increases in the peak power and total work performed in the sprints. In addition, during the interventions, the sum of the gastrointestinal symptom scores and the severity of respiratory symptoms were higher in the T groups compared to the NT groups, with probiotic supplementation reducing the gastrointestinal and respiratory symptoms. In the post-intervention period, the aerobic performance, measured in the incremental test and time trial, was not improved by SIT, supplementation, or the interaction between them. Furthermore, there was no significant difference in the physiological and clinical variables measured between the groups at rest, during, and after the exercises. Conclusion: In the present conditions, the SIT increases anaerobic performance without interfering with aerobic performance. Besides, SIT increases the occurrence of gastrointestinal symptoms and the severity of respiratory symptoms. Probiotic supplementation mitigates the development of gastrointestinal and respiratory symptoms but does not interfere with physical performance or physiological parameters.