Fig. 4
From: Sex differences in autonomic function following maximal exercise
Heart rate variability before and following maximal exercise. a Heart rate variability, low frequency. b Heart rate variability, high frequency. c Heart rate variability low-frequency/high-frequency ratio. HRV heart rate variability, LF low frequency, HF high frequency. * p < 0.05 sex differences; # p < 0.05 interaction (time × sex); $ p < 0.05 time effect