Table 1.
Descritive values (mean and standard deviation) of research in baseline.
| Variables | Mean (SD) |
|---|---|
| SDNN (ms) | 64.2 (23.7) |
| pNN50 (%) | 21.7 (4.8) |
| InRMSSD (ms) | 3.6 (0.5) |
| LF (n.u.) | 51.7 (20.2) |
| HF (n.u.) | 52.2 (18.6) |
| LF/HF | 1.0 (0.2) |
| CSAI-2R | 30.1 (5.6) |
| IPS (points) | 754.3 (72.6) |
| Age (years) | 15.6 (0.2) |
| BMI (kg/m²) | 21.8 (1.7) |
| %BF | 20.4 (4.5) |
| Training regimen (years) | 10.6 (0.7) |
Note. SDNN = standard deviation of all N-N intervals; pNN50 = successive percentage of differences in R-R intervals greater than 50 ms; InRMSSD = logarithm of the difference of the quadratic mean of the successive normal R-R intervals; LFnu = corrected low frequency spectral component; HFnu = corrected high frequency spectral component; LF/HF = ratio between LF and HF; CSAI-2R = Competitive Anxiety Inventory; IPS = International Point Score; BMI = body mass index; %BF = body fat percentage.