Baseline measurement of HRV measures in the anaerobic exercise protocol (RSA test)
| Control (n=14) | Football (n=12) | Futsal (n=10) | p value | Power | |
|---|---|---|---|---|---|
| mRRI (ms) | 966 (845–1052) | 1050 (962–1167) | 1059 (897–1170) | 0.216 | 1 |
| SDRR (ms) | 71 (56–105) | 99 (78–152) | 92 (64–101) | 0.146 | 1 |
| CVRR (%) | 7.0 (5.6–10.5) | 9.1 (8.3–12.9) | 8.6 (7.7–9.7) | 0.227 | 1 |
| rMSSD (ms) | 67 (33–95) | 91 (62–123) | 75 (55–100) | 0.184 | 1 |
| TP (ms2) | 1924 (980–4278) | 3157 (1424–5513) | 2597 (1360–3915) | 0.439 | 1 |
| VLFP (ms2) | 528 (325–1205) | 838 (473–2672) | 800 (595–1109) | 0.198 | 0.99 |
| LFP (ms2) | 445 (325–1519) | 976 (466–2354) | 686 (285–1176) | 0.218 | 0.84 |
| HFP (ms2) | 917 (219–1573) | 1364 (710–2353) | 922 (480–1547) | 0.295 | 0.94 |
| nVLFP (nu) | 32.0 (25.5–46.8) | 29.7 (23.6–38.1) | 37.0 (28.99–44.0) | 0.426 | 1 |
| nLFP (nu) | 30.2 (26.0–36.5) | 30.3 (23.7–41.8) | 23.8 (17.2–41.7) | 0.399 | 1 |
| nHFP (nu) | 34.2 (23.8–40.2) | 38.5 (30.5–44.5) | 35.9 (25.5–42.9) | 0.584 | 1 |
| VLHR | 0.9 (0.6–2.0) | 0.7 (0.6–1.3) | 0.9 (0.7–1.4) | 0.484 | 0.35 |
| LHR | 1.1 (0.7–1.5) | 0.7 (0.6–1.2) | 0.7 (0.4–1.3) | 0.497 | 1 |
| HFF (Hz) | 0.2 (0.2–0.3) | 0.2 (0.2–0.3) | 0.3 (0.3–0.3) | 0.053 | 1 |
Data are presented as median values (25–75 centile).
CVRR, coefficient of variation of R-R interval; HFF, frequency of the high-frequency component; HFP, high-frequency power; HRV, heart rate variability; LFP, low-frequency power; LHR, LFP/HFP ratio; mRRI, mean R-R interval; nHFP, normalised HFP; nLFP, normalised LFP; nVLFP, normalised VLFP; rMSSD, the mean sum of the squared differences between R-R intervals; RSA, repeated sprint ability; SDRR, SD of R-R interval; TP, total power; VLFP, very-low-frequency power; VLHR, VLFP/HFP ratio.