Key result
Thermoneutral water immersion lowered heart rate (67.8 vs 81.2 bpm in air) and blood pressure, while cool water immersion increased blood pressure but further decreased heart rate (55.3 bpm).
Why the study?
Does short-term thermoneutral and cool head-out water immersion alter cardiovascular autonomic control in healthy subjects?
Population
12 healthy subjects
Comparison
Head-out water immersion at 35-36 degrees C and… vs Exposure to air at 24-25 degrees C for 20…
Design
Other
Follow-up
20 minutes per exposure
Authors
Loading...
Supports temperature-dependent autonomic responses to immersion in healthy subjects; leaves open translation to patients with cardiovascular disease.
Does short-term thermoneutral and cool head-out water immersion alter cardiovascular autonomic control in healthy subjects?
Thermoneutral water immersion lowers sympathetic activity and arterial tone, whereas moderate cooling triggers vascular sympathetic activation, though both increase cardiac parasympathetic activity.
Mourot et al. (2008) studied Healthy subjects (n=12). Head-out water immersion (thermoneutral and cool) vs. Air (24-25 degrees C) was evaluated on Hemodynamic variables and indexes of autonomic nervous activity. Thermoneutral water immersion lowered heart rate (67.8 vs 81.2 bpm in air) and blood pressure, while cool water immersion increased blood pressure but further decreased heart rate (55.3 bpm).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: