Table 2. Comparison of heart rate variability, heart rate, sleep, performance tests and training during the study period.
| Week 1 | Week 3 | |||||
|---|---|---|---|---|---|---|
| mean ± SD | 95% CI | mean ± SD | 95% CI | % diff | P | |
| Nocturnal | ||||||
| RMSSDAM (ms) | 75 ± 26a | 57.7, 92.7 | 77 ± 17a | 65.6, 88.7 | 8.0 | 0.654 |
| RMSSDPM (ms) | 60 ± 20a | 46.7, 73.2 | 63 ± 21a | 49.5, 77.2 | 6.6 | 0.306 |
| RMSSDNOC (ms) | 68 ± 22a | 52.6, 82.4 | 70 ± 17a | 58.9, 81.5 | 6.8 | 0.344 |
| Heart rate (bpm) | 57 ± 5 | 53.0, 60.0 | 54 ± 5 | 50.2, 56.9 | -5.2 | 0.002* |
| Sleep (hours) | 8.2 ± 0.4 | 8.0, 8.5 | 8.6 ± 0.6 | 8.2, 9.0 | 3.8 | 0.095 |
| Morning Orthostatic | ||||||
| RMSSDRest (ms) | 104 ± 39a | 77.8, 130.2 | 115 ± 41a | 87.1, 142.4 | 13.4 | 0.151 |
| RMSSDStand (ms) | 26 ± 8.6 | 18.3, 33.5 | 29 ± 9 | 19.9, 37.3 | 14.5 | 0.361 |
| Heart rate (bpm) | 57 ± 6 | 53.3, 61.3 | 55 ± 5 | 51.3, 58.5 | -3.9 | 0.063 |
| Performance Test | ||||||
| Heart rate (bpm) | 181 ± 6.9 | 176.3, 185.0 | 180 ± 8.2 | 174.0, 185.0 | -0.2 | 0.447 |
| Heart rate range (bpm) | 28 ± 5.8 | 24.4, 32.2 | 30 ± 5.4 | 26.1, 33.3 | 1.3 | 0.181 |
| Blood lactate (mmol/l) | 3.6 ± 0.9 | 3.0, 4.1 | 3.6 ± 1.0 | 3.0, 4.3 | 0.4 | 0.781 |
| Counter movement jump (cm) | 34.1 ± 6.3 | 29.9, 38.4 | 32.5 ± 5.3 | 28.9, 36.0 | -1.2 | 0.122 |
| Training | ||||||
| Volume (min/week) | 514 ± 141 | 396.1, 632.4 | 563 ± 156 | 432.7, 693.0 | 16 | 0.499 |
* p < 0.01.
a Significant difference between nocturnal and morning RMSSDRest