Table 2 Effect of duration of overload intervention on heart rate and heart rate variability
Categories⩽2 weeks>2 weeks
nSMD (95% CI)p ValuenSMD (95% CI)p Value
HR
    Rest890.55 (−0.09 to 1.02)0.011550.03 (−0.19 to 0.26)0.78
    Submaximal exercise61−0.03 (−0.48 to 0.43)0.91132−0.38 (−0.63 to −0.13)0.006
    Maximal exercise26−0.75 (−1.32 to −0.17)0.01163−0.33 (−0.55 to −0.10)0.007
HRV
    LH+HF51−0.49 (−1.03 to −0.04)0.0732−0.08 (−0.57 to −0.42)0.76
    LF/HF510.52 (0.12 to 0.93)0.02250.18 (−0.38 to 0.74)0.53
  • HR, heart rate; HRV, heart rate variability; HF, high frequency; LF, low frequency; SMD, standardised mean difference.