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Thermoneutral immersion exercise accelerates heart rate recovery: A potential novel training modality
Mauricio Garzon1,2,3, Olivier Dupuy4, Laurent Bosquet4
1a Cardiovascular Prevention and Rehabilitation Centre (EPIC), Montreal Heart Institute , Montreal , Quebec , Canada.
European Journal of Sport Science
|September 7, 2016
Summary
Heart rate recovery (HRR) is faster in the early phase after immersible ergocycle (IE) exercise compared to dry land ergocycle (DE) exercise. This indicates accelerated parasympathetic reactivation during IE recovery in healthy young adults.
Area of Science:
- Exercise Physiology
- Autonomic Nervous System Function
- Cardiovascular Recovery
Background:
- Heart rate recovery (HRR) is a key indicator of autonomic nervous system function and cardiovascular health.
- Understanding the impact of different exercise modalities on HRR is crucial for optimizing training and rehabilitation protocols.
- Immersible ergocycle (IE) exercise in thermoneutral water may influence physiological responses differently than dry land ergocycle (DE) exercise.
Purpose of the Study:
- To compare heart rate recovery (HRR) following maximal incremental exercise on a dry land ergocycle (DE) versus an immersible ergocycle (IE).
- To investigate differences in parasympathetic reactivation during the early and late phases of recovery between DE and IE exercise.
- To determine if chest-level immersion in thermoneutral water affects HRR compared to standard dry land exercise.
Main Methods:
- Fifteen healthy young participants completed maximal incremental exercise tests on both DE and IE protocols.
- Exercise protocols were standardized for external power output progression and pedaling cadence adjustments.
- Continuous measurements of gas exchange and heart rate (HR) were recorded during exercise and for 5 minutes of recovery.
Main Results:
- Maximal heart rates achieved during DE and IE exercise did not significantly differ.
- Early-phase parasympathetic reactivation (10-60 seconds post-exercise) was significantly more pronounced during IE recovery compared to DE recovery.
- Late-phase parasympathetic reactivation (120-300 seconds post-exercise) showed no significant difference between the two conditions.
Conclusions:
- Incremental maximal exercise using an immersible ergocycle (IE) at chest level in thermoneutral water accelerates early-phase parasympathetic reactivation.
- The findings suggest that water immersion may enhance early cardiovascular recovery compared to dry land exercise.
- This study highlights potential benefits of IE exercise for promoting faster autonomic recovery in healthy young individuals.
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