Table 1 Descriptive characteristics of football players by age category.
Measurement | Â | U10 | U12 | U14 | U16 | U18 |
|---|---|---|---|---|---|---|
(n = 13) | (n = 13) | (n = 17) | (n = 12) | (n = 9) | ||
Age (years) | P1 | 9.6 ± 0.7 | 11.8 ± 0.8 | 13.6 ± 0.7 | 15.8 ± 0.7 | 17.6 ± 0.6 |
P2 | 9.8 ± 0.8 | 11.3 ± 0.7 | 13.8 ± 0.8 | 15.6 ± 0.5 | 17.8 ± 0.4 | |
P3 | 10.6 ± 0.8 | 12.2 ± 0.6 | 14.5 ± 0.7 | 16.4 ± 0.7 | 18.5 ± 0.6 | |
Height (cm) | P1 | 137.2 ± 18.1 | 143.7 ± 19.6 | 156.1 ± 36.7 | 170.3 ± 25.7 | 173.8 ± 20.4 |
P2 | 138.7 ± 21.3 | 145.6 ± 19.4 | 159.2 ± 33.3 | 171.1 ± 25.2 | 173.1 ± 18.7 | |
P3 | 140.2 ± 25.1 | 147.3 ± 23.8 | 162.3 ± 32.8 | 172.4 ± 25.3 | 174.5 ± 19.6 | |
Weight (kg) | P1 | 31.5 ± 12.7 | 37.3 ± 31.2 | 46.9 ± 27.5 | 61.7 ± 43.6 | 65.8 ± 27.6 |
P2 | 32.7 ± 14.2 | 38.8 ± 31.8 | 48.1 ± 29.6 | 64.0 ± 44.7 | 64.3 ± 28.3 | |
P3 | 32.2 ± 12.3 | 39.7 ± 32.6 | 50.8 ± 31.7 | 64.2 ± 44.6 | 67.6 ± 23.1 | |
Lean Body mass (g) | P1 | 23785.73 ± 2479.68 | 26529.42 ± 3345.42 | 36117.83 ± 5554.00 | 48662,24 ± 4674.31 | 52531,68 ± 5701.17 |
P2 | 24274.78 ± 2473.20 | 26927.82 ± 3491.66 | 37418.91 ± 5994.39 | 48945.64 ± 4702.52 | 52554,58 ± 6893.87 | |
P3 | 25202.87 ± 2534.08 | 27997.01 ± 3664.72 | 39764.05 ± 6161.17 | 50145.35 ± 4780.38 | 52192,57 ± 54932.45 | |
Body mass index (BMI: kg · m–2) | P1 | 16.4 ± 1.6 | 18.2 ± 2.3 | 18.8 ± 1.8 | 21.1 ± 2.6 | 21.8 ± 2.3 |
P2 | 16.7 ± 1.7 | 18.3 ± 2.4 | 19.1 ± 1.9 | 21.9 ± 2.5 | 21.4 ± 2.2 | |
P3 | 16.2 ± 1.7 | 18.1 ± 2.5 | 19.1 ± 1.7 | 21.6 ± 2.7 | 22.2 ± 2.3 | |
Competitive level | Â | Provincial | Provincial | Regional | Regional | National |
Previous experience (years) |  | 2 ± 1.7 | 3 ± 2.3 | 4 ± 2.8 | 5 ± 3.1 | 11 ± 2.7 |
Training frequency (h/week) | Â | 2.5 | 2.5 | 3.5 | 3.5 | 5 |
