2020 Volume 57 Issue 2 Pages 144-150
One hundred thirty-five physically healthy women aged 45–55 years without organic disease were divided into three groups BMI<18.5, 18.5≤BMI<25.0, 25.0≤BMI<30, the BMI classification used by the Japan Society for the Study of Obesity (JASSO). Their heart rate variability (HRV) was evaluated by the active tracer measurement method during supine rest, ergometer testing and post-ergometer sitting. There were no significant differences in HRV during rest and ergometer testing among three groups, but during post ergometer sitting the 25.0≤BMI<30 group showed a significantly higher HRV (CVRR, SDNN, LF and HF) than the other two groups, and the BMI<18.5 group showed a significantly lower HRV than the 25.0≤BMI<30 group during post ergometer sitting with a LF component that was remarkably lower than other two groups. In conclusion, from the standpoint of HRV activity, middle-aged women without organic disease and BMI<18.5 need careful examination and follow up.
