Recuperação autonômica cardíaca de jogadores de futsal

Abstract

Indoor soccer is an intermittent sport with many pauses and substitutions during the match, which allows the recovery of physiological parameters during these moments, providing the player, to play at high intensity. The recovery process after the exercise is mediated by complex physiological phenomena. Due to the diversity of physiological phenomena involved in the recovery cardiac autonomic such as catecholamines, lactate concentration, pH, ammonia, temperature, plasma volume, etc. This parameter has been used as an indicator of recovery in sports. It is known that factors such as aerobic fitness and training influence the cardiac autonomic recovery. This dissertation focused on the study of cardiac autonomic recovery of indoor soccer players. In the first study, we investigated the influence of the coverage indoor soccer training on the recovery of cardiac autonomic modulation. Participated for the study indoor soccer players and active individuals with similar fitness level of athletes with VO2max of 49.4 ± 3.4 and 50.1 ± 5.8 ml.kg.min-1, respectively. We evaluated the recovery of cardiac autonomic modulation in the first five minutes of recovery using the index RMSSD30s normalized index related to vagal activity. It was observed that the soccer players showed recovery of autonomic modulation greater than active individuals from the 90 s recovery (LnRMSSD30s 0.84 ± 0.43 and 0.64 ± 0.17 ms respectively). In this study it was also noted that the soccer players showed vagal reactivation, as the active subjects had vagal suppression during all five minutes of recovery. We conclude that the training of indoor soccer, due to the dynamics of the game, improves recovery of cardiac autonomic modulation. In the second study, we investigated whether the specific training of short duration, the preseason, could influence the recovery of cardiac autonomic of futsal players. We evaluated nine players of indoor soccer, before and after the preseason of four weeks. In this study, we evaluated the recovery of vagal tone, identified by recovery heart rate (HRrec) and cardiac autonomic modulation, identified by the recovery of heart rate variability (recHRV). The HRrec was evaluated by the absolute values of every 30 seconds, while recHRV was evaluated by the index LnRMSSD2-5min. It was observed that after the preseason, athletes decreased in HRmax 7 bpm, difference has been seen in almost all five minutes of recovery. Moreover,

recHRV improved after the preseason LnRMSSD2-5min early preseason was 1.00 ± 0.45 ms and increased to 1.29 ± 0.63 ms at the end of the preseason. It was concluded that specific and short-period preseason training in indoor soccer players improved cardiac autonomic recovery.