Table 4. Within-subject correlation between sleep indices and nocturnal HRV with training and match load responses during an international tournament (n = 20).
| TD | HSR | s-RPE | Exposure time | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P | r (95% CIs) | Description | P | r (95% CIs) | Description | P | r (95% CIs) | Description | P | r (95% CIs) | Description | |
| TST | 1.000 | -0.27 (-0.64; 0.19) | Unclear | 1.000 | -0.21 (-0.60; 0.26) | Unclear | 1.000 | -0.25 (-0.62; 0.21) | Unclear | 1.000 | -0.21 (-0.60; 0.26) | Unclear |
| SE | 0.393 | 0.19 (-0.28; 0.58) | Unclear | 0.296 | 0.23 (-0.24; 0.61) | Unclear | 0.348 | 0.21 (-0.26; 0.60) | Unclear | 0.296 | 0.23 (-0.24; 0.61) | Unclear |
| lnRMSSD | 0.424 | 0.18 (-0.29; 0.58) | Unclear | 0.398 | 0.19 (-0.28; 0.58) | Unclear | 0.407 | 0.19 (-0.28; 0.58) | Unclear | 0.398 | 0.19 (-0.28; 0.58) | Unclear |
Abbreviations: TST, total sleep time; SE, sleep efficiency; lnRMSSD, natural logarithm of square root of the mean of the sum of the squares of differences between adjacent NN intervals; CIs, confidence intervals; TD, total distance; HSR, high-speed running; s-RPE, session-rating of perceived exertion.