The role of water intake on cardiac vagal reactivation after upper-body resistance exercise.
The aim of this study was to assess the hypothesis that water intake will accelerate cardiac vagal reactivation after a single session of upper-body resistance exercise. 13 healthy men (26.5±5.9 years) with previous experience in resistance training were enrolled. In visits 1 and 2, participants performed the one-repetition maximum (1RM) test and retest with the bench press exercise. The sessions 3 and 4 were performed randomly, while participants consumed 500 ml (experimental visit) or 50 ml (control visit) of water immediately after 3 sets of maximum repetitions at 80% of 1RM. Cardiac vagal activity was represented by cardiac vagal index (CVI) measured before, immediately after and 30 min post-exercise. Additionally, heart rate and blood pressure were measured. The results show that CVI was higher 30 min post-exercise when 500 ml of water was ingested compared to 50 ml (1.39±0.07 vs. 1.23±0.07; p=0.02) (mean±SEM). Heart rate and blood pressure values were similar in both trials. We conclude that water intake accelerates post-resistance exercise cardiac vagal reactivation. These findings suggest that hydration after resistance exercise might be beneficial for cardiovascular safety in healthy subjects.
Department of Exercise Physiology, Maternity Hospital Therezinha de Jesus, Faculty of Medical and Healthy Sciences - SUPREMA - Juiz de Fora, MG, Brazil.
A L
AL
Teixeira
Department of Exercise Physiology, Maternity Hospital Therezinha de Jesus, Faculty of Medical and Healthy Sciences - SUPREMA - Juiz de Fora, MG, Brazil.
P S
PS
Ramos
Department of Physical Education, Federal University of Viçosa, Viçosa, Brazil.
J B
JB
Marins
Department of Exercise Physiology, Maternity Hospital Therezinha de Jesus, Faculty of Medical and Healthy Sciences - SUPREMA - Juiz de Fora, MG, Brazil.
D R
DR
Ricardo
D000328:Adult; D001794:Blood Pressure; D004326:Drinking / Q000502:physiology*; D006321:Heart / Q000294:innervation* / Q000502:physiology; D006339:Heart Rate; D006801:Humans; D008297:Male; D055070:Resistance Training; D034941:Upper Extremity / Q000502:physiology; D014630:Vagus Nerve / Q000502:physiology*; D055815:Young Adult