Fig5. Relationship between mean blood flow (BF) and mean high frequency component (HF) of heart rate variability during pre-PS-AM stage (Before) (Upper panel) and PS-AM stage (Middle panel), and between the percentage changes of BF [A%BF=(BF during PS- AM—BF during pre-PS-AM)/(BF during pre-PS-AM)x100%] and HF [A%HF=(HF during PS-AM-BF during pre-PS-AM)/BF during pre-PS-AMx100%] (Lower panel). PS-AM, pulse-synchronized air- massage. ● Male; ○ Female.