Table 3.
Heart rate variability measures in the three participant groups.
| Sedentary group | Basketball players | Swimmers | |
|---|---|---|---|
| Heart rate (bpm) | 73.96 + 8.98 | 67.73 + 10.42 | 65.81 + 10.62 |
| SDRR (ms) | 54.65 + 17.97 | 62.85 + 24.17 | 77.31 + 30.28 |
| RMSSD (ms) | 50.58 + 20.78 | 60.35 + 36.11 | 78.58 + 44.62 |
| LF (ms2) | 1040.12 + 1579.89 | 1031.50 + 792.57 | 1822.77 + 1735.76 |
| HF (ms2) | 1347.46 + 1005.82 | 1680.38 + 1531.63 | 1934.77 + 1720.75 |
| LF/HF | 0.73 + 0.72 | 0.92 + 1.16 | 0.92 + 1.14 |
| LF nu | 37.27 + 16.25 | 40.23 + 17.52 | 39.19 + 17.08 |
| HF nu | 61.09 + 16.23 | 57.08 + 16.77 | 58.46 + 16.89 |
| SD1 | 35.81 + 14.70 | 42.85 + 25.71 | 55.42 + 31.32 |
| SD2 | 68.04 + 22.46 | 76.65 + 26.45 | 92.42 + 30.00 |
Data are mean ± SD.
HR (bpm): resting heart rate in beats per minute (bpm); SDRR: standard deviation of all R-R interval; RMSSD: root mean square difference of successive R-R interval; HF: high frequency (HF; 0.15–0.4 Hz); LF: low frequency (LF; 0.04–0.15 Hz); SD1: standard descriptor 1; SD2: standard descriptor 2; nu: normalized unit; ms: millisecond; ms2: milliseconds squared. *Significantly different (p < 0.05) from sedentary group.