Key result
Four-day dry immersion slightly increased resting heart rate and reduced resting systolic blood pressure, but had no distinct effect on hemodynamics during exercise or metaboreflex potentiation.
Why the study?
Does low-frequency electrostimulation affect metaboreflex regulation of hemodynamics during exercise in subjects undergoing dry immersion?
Does low-frequency electrostimulation affect metaboreflex regulation of hemodynamics during exercise in subjects undergoing dry immersion?
Four-day dry immersion alters resting hemodynamics but does not significantly affect metaboreflex regulation during exercise.
Dry immersion model findings require validation before clinical translation; leaves open electrostimulation effects on metaboreflex during exercise.
The effects of four-day dry immersion on metaboreflex regulation of hemodynamics were evaluated during local static exercise (30% of the maximum voluntary contraction) of the calf plantar flexors. One group of immersed subjects received low-frequency electrostimulation of their leg muscles to decrease the immersion effect on the EMG of exercising muscles. Metaboreflex regulation was evaluated by comparison of cardiovascular responses to physical loads with and without post-exercise circulatory occlusion. Immersion slightly increased the heart rate (HR) and reduced the systolic blood pressure in resting subjects; however, it did not have a distinct effect on blood pressure (BP) and HR during exercise or metaboreflex potentiation of hemodynamic shifts.
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Bravyy et al. (2010) studied this question. Four-day dry immersion vs. Pre-immersion/resting state was evaluated on Metaboreflex regulation of hemodynamics (blood pressure and heart rate during exercise). Four-day dry immersion slightly increased resting heart rate and reduced resting systolic blood pressure, but had no distinct effect on hemodynamics during exercise or metaboreflex potentiation.
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