Table 2.
Correlation between exercise load and HRV5-min.
| BLa (mmol·L−1) | RPE | Exercise duration (s) | |
|---|---|---|---|
| Time-domain | |||
| RR (ln ms) | −0.47∗∗ | −0.27 | 0.22 |
| SDNN (ln ms) | −0.38∗ | −0.44∗∗ | −0.40∗∗ |
| RMSSD (ln ms) | −0.56∗∗∗ | −0.38∗ | 0.16 |
| Frequency-domain | |||
| LF (ln ms2) | −0.64∗∗∗ | −0.44∗∗ | −0.23 |
| HF (ln ms2) | −0.58∗∗∗ | −0.39∗ | −0.38∗ |
| TP (ln ms2) | −0.61∗∗∗ | −0.49∗∗ | 0.20 |
BLa: Blood lactate concentration; RPE: Rating of Perceived Exertion; RR: mean time between normal R waves of ECG; RMSSD: Root Mean Square of successive differences; SDNN: Standard Deviation of Normal to Normal; LF: Low Frequency, HF: High Frequency, TP: Total Power; ∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001.