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Water intake accelerates parasympathetic reactivation after high-intensity exercise
Tiago Peçanha1, Marcelle Paula-Ribeiro, Edson Campana-Rezende
1Laboratory of Motor Assessment, Faculty of Physical Education and Sports, Federal University of Juiz de Fora, Minas Gerais, Brazil.
Water intake (WI) significantly enhances parasympathetic recovery after high-intensity exercise. This finding suggests a cardioprotective effect of WI, improving cardiovascular health post-intense physical activity.
Area of Science:
- Exercise Physiology
- Cardiovascular Health
- Autonomic Nervous System Function
Background:
- Water intake (WI) is known to improve parasympathetic recovery after moderate-intensity exercise.
- The cardiovascular benefits of WI following high-intensity exercise remain under-investigated.
Purpose of the Study:
- To evaluate the impact of water intake on post-exercise parasympathetic recovery after high-intensity exercise.
- To assess the potential cardioprotective effects of water intake in this context.
Main Methods:
- Twelve recreationally active men underwent a 30-minute high-intensity cycling protocol.
- Participants were randomly assigned to either water intake (WI) or a control (CON) condition post-exercise.
- Heart rate (HR) and heart rate variability (HRV) were continuously monitored to analyze parasympathetic reactivation.
Main Results:
- Water intake did not alter heart rate recovery speed compared to the control group.
- A significant increase in postexercise heart rate variability (HRV) was observed in the WI group compared to CON (p < .05).
- Specific HRV indices, including SD1 and HF(ln), were notably higher with WI.
Conclusions:
- Water intake accelerates parasympathetic reactivation after high-intensity exercise.
- This enhanced recovery suggests a significant cardioprotective benefit of water intake following strenuous physical activity.
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