Effects of GUASHA on Heart Rate Variability in Healthy Male Volunteers under Normal Condition and Weightlifters after Weightlifting Training Sessions

Figure 2

The changes in the time domain of HRV before and after GUASHA in the healthy males under normal condition and weightlifters under weightlifting training condition. The black bar means before GUASHA. The white bar means after GUASHA treatment. H means healthy males; W means male weightlifters. SDNN means standard deviation of N-N intervals; SI means stress index; pNN50 means proportion derived by dividing the number of interval differences of successive N-N intervals greater than 50 ms; RMSSD means root means square of successive differences. The units in -axis are different in accordance with units in the brackets of the -axis items, . means the time domain of the subjects before GUASHA versus after GUASHA.