Table 1.
Anthropometric, physical activity and HRV data for the different age groups.
| 2 years | 3 years | 4 years | 5 years | |
|---|---|---|---|---|
| N [m,f] | 19 (5; 14) | 158 (58; 49) | 108 (58; 50) | 23 (13; 10) |
| Age [years] | 2.8 (2.6; 2.9) | 3.5 (3.3; 3.7) | 4.3 (4.1; 4.6) | 5.5 (5.2; 5.9) |
| Height [cm] | 94 (91; 95) | 100 (97; 107) | 106 (103; 108) | 117 (110; 118) |
| Weight [kg] | 14.1 (12.9; 15.8) | 16.0 (15.0; 17.5) | 17.8 (16.2; 18.9) | 20.9 (18.8; 22.9) |
| BMI [kg.m−2] | 16.4 (15.7; 17.1) | 16.1 (15.4; 16.9) | 15.9 (15.3; 16.6) | 15.6 (15.0; 16.8) |
| TPA [counts.min−1] | 1,321 (1,102; 1,401) | 1,357 (1,160; 1,554) | 1,489 (1,289; 1,680) | 1,571 (1,367; 1,705) |
| MVPA [min.day−1] | 54.8 (35.6; 78.2) | 60.6 (45.0; 87.4) | 83.6 (62.0; 110.0) | 101.7(84.3; 114.3) |
| HR [beats.min−1] | 87.6 (85.2; 93.26) | 86.9 (80.7; 93.4) | 84.9 (78.0; 90.2) | 80.0 (74.1; 85.8) |
| RMSSD [ms] | 62.3 (36.5; 86.5) | 56.7 (35.6; 94.8) | 57.3 (37.8; 85.2) | 66.0 (38.9; 124.8) |
| SDNN [ms] | 58.9 (32.6; 72.1) | 47.2 (31.6; 75.6) | 49.9 (33.3; 69.3) | 53.5 (32.0; 95.2) |
| HF [ms2] | 2,526 (754; 3,699) | 1,499 (630; 3,983) | 1,559 (719; 3,292) | 2,051 (718; 6,309) |
| LF [ms2] | 228 (172; 464) | 242 (102; 579) | 230 (111; 620) | 415 (144; 723) |
| LF/HF | 0.14 (0.08; 0.27) | 0.16 (0.10; 0.25) | 0.16 (0.10; 0.30) | 0.17 (0.10; 0.26) |
| Total Power [ms2] | 2,961 (902; 4,538) | 1,764 (742; 4,652) | 1,284 (869; 3,961) | 2,474 (824; 7,684) |
| DFA alpha 1 | 0.60 (0.52; 0.69) | 0.55 (0.46; 0.63) | 0.55 (0.44; 0.63) | 0.52 (0.41; 0.59) |
TPA, total physical activity; MVPA, moderate-to-vigorous physical activity; HR, heart rate; RMSSD, square root of the mean squared differences of adjacent RR intervals; SDNN, standard deviation of RR intervals; HF, high frequency power; LF, low frequency power; DFA, detrended fluctuation analysis.
Data are presented as median (interquartile range). HRV parameters are calculated from the high %HF segments.