Table 1. Physiological parameters. Values are represented as means (±standard mean error).
| Parameter |
Recreational soccer players |
Professional soccer players |
| HF (m·s-2) |
473.1 (84.4) |
571.1 (190.6) |
| LF(m·s-2) |
745.5 (107.6) |
317.0 (84.4) * |
| LF/HF |
1.72 (.37) |
1.32 (.44) |
| VO2max (ml·Kg-1·min-1) |
57.3 (1.0) |
53.5 (1.2) |
| Tension Index |
75.8 (12.0) |
102.8 (17.2) |
| SDSD (ms) |
62.9 (6.6) |
77.3 (15.8) |
| RMSSD (ms) |
49.9 (5.5) |
59.7 (12.1) |
Abbreviations: Cardiac high frequency (HF), cardiac low frequency (LF), cardiac high frequency low frequency ratio (HF/LF), tension index, maxim oxygen volume consumption (VOmax), the standard deviation of the NN intervals (SDSD) and the square root of the mean squared differences of successive NN intervals (RMSSD).* P value < 0.05.
