Table 4.
Anthropometric and fitness differences among cluster groups
| Strong (n = 37) | Fit (n = 29) | Unfit (n = 26) | |
|---|---|---|---|
| Age, y | 4.88 ± 0.72 | 4.80 ± 0.71 | 4.71 ± 0.89 |
| Weight, kg | 18.51 ± 2.85 | 18.59 ± 2.63 | 18.73 ± 2.91 |
| Height, cm | 107.27 ± 6.63 | 107.69 ± 5.25 | 106.04 ± 8.19 |
| BMI, kg/m2 | 16.01 ± 1.24 | 15.97 ± 1.27 | 16.55 ± 0.99 |
| Tibial length, mm | 228.32 ± 18.60 | 228.52 ± 17.33 | 226.08 ± 22.78 |
| Sex, males (%)/females (%) | 19 (51)/18 (49) | 16 (55)/13(45) | 15 (58)/11 (42) |
| School year, a 1/2/3 | 6/19/12 | 8/11/10 | 9/10/7 |
| Physical fitness | |||
| Mean handgrip, kg | 7.46 ± 2.329 b | 7.19 ± 2.42 b | 5.68 ± 2.39 |
| Rel_handgrip, kg/weight | 0.40 ± 0.10 b | 0.38 ± 0.09 b | 0.30 ± 0.10 |
| Standing long jump, cm | 87.19 ± 20.02 b | 85.48 ± 19.99 b | 69.65 ± 19.14 |
| Speed run time 4 × 10 m, s | 16.33 ± 1.92 b | 15.36 ± 1.76 b , c | 17.98 ± 2.46 |
| Standing 1 leg, s | 16.00 ± 12.42 | 15.03 ± 10.40 | 12.48 ± 13.73 |
| Laps, number of laps | 16.84 ± 8.09 | 31.31 ± 11.21 b , d | 13.42 ± 7.40 |
BMI, body mass index; Rel_handgrip, relative handgrip.
a
School year 1/2/3 indicates the number of participants in each group from preschool year 1, year 2, and year 3.
b
Significant difference with the unfit group (P < 0.05).
c
Tendency toward a difference between the strong and fit groups (P = 0.06).
d
Significant difference between the strong and fit groups (P < 0.05).