Changes in Baroreceptor Reflex Sensitivity at Various Reclining Angles during Rest and Dynamic Exercise

[Purpose] Comprehension of hemodynamics during dynamic exercise is clinically important. The purpose of this study was to investigate changes in participants’ baroreceptor reflex sensitivity (BRS) at three reclining angles during rest and dynamic exercise. [Subjects and Methods] The participants were 14 sedentary healthy males with a mean age of 20.8 years, mean body mass of 64.5 kg, mean height of 171.1 cm, and a body mass index of 22.0 kg/m2. The reclining angles were 20°, 45° and 70°, and the change in BRS was measured until the anaerobic threshold (AT) was reached. [Results] During rest, BRS at a reclining angle of 70° showed a significant decrease compared to that at 20°. During dynamic exercise performed at the three reclining angles BRS showed no change until AT. [Conclusion] Lower BRS during rest may depend on the reclining angle. Reclining angle may not affect BRS during dynamic exercise until AT is reached.