RESUMEN
Objectives: Frequency-domain analysis of heart rate variability [HRV] is an effective tool to evaluate autonomic balance. This study aimed to investigate gender differences in HRV among individuals undergoing regular resistance training
Methods: This preliminary cross-sectional study was conducted from April to September 2016 in Joao Pessoa, Paraiba, Brazil. The low-frequency [LF], high-frequency [HF] and LF/HF ratio components of HRV spectral analysis were analysed among 22 men and 27 women undergoing regular resistance training
Results: Among the male participants, the LF component was significantly increased compared to females in both the supine [1,171 +/- 192 versus 545 +/- 74 ms[2]; P = 0.0067] and upright [1,824 +/- 260 versus 738 +/- 133; P = 0.0011] positions. The LF/HF ratio was also significantly increased in both positions among male participants [P <0.0500 each]
Conclusion: These preliminary data suggest a possible gender difference in the HRV of individuals undergoing resistance training