Table 2.
Descriptive characteristics of muscular strength and aerobic endurance sub-tests according to gender and SES over three time points (N = 349).
| Variables | Boys (n = 165) | Girls (n = 184) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low SES (n = 83) | High SES (n = 82) | Low SES (n = 118) | High SES (n = 66) | |||||||||
| M ± SD | Min | Max | M ± SD | Min | Max | M ± SD | Min | Max | M ± SD | Min | Max | |
| Long jump (cm) | ||||||||||||
| 6 years old | 91.40 ± 20.30 | 43.20 | 134.60 | 106.70 ± 15.2 | 66.40 | 55.00 | 83.08 ± 15.20 | 50.80 | 134.62 | 91.40 ± 15.20 | 50.80 | 134.00 |
| 9 years old | 111.80 ± 20.30 | 76.20 | 68.00 | 127.00 ± 25.40 | 20.30 | 70.00 | 104.10 ± 17.80 | 58.40 | 149.90 | 111.70 ± 25.40 | 53.30 | 165.10 |
| 12 years old | 137.20 ± 15.20 | 91.40 | 70.00 | 142.20 ± 22.90 | 91.40 | 80.00 | 127.00 ± 22.9.00 | 76.20 | 269.20 | 129.50 ± 40.60 | 76.20 | 332.70 |
| Push-up (reps) | ||||||||||||
| 6 years old | 12.00 ± 6.00 | 0.00 | 26.00 | 10.00 ± 5.00 | 0.00 | 25.00 | 9.00 ± 6.00 | 0.00 | 20.00 | 10.00 ± 5.00 | 0.00 | 17.00 |
| 9 years old | 21.00 ± 5.00 | 10.00 | 33.00 | 22.00 ± 5.00 | 11.00 | 40.00 | 15.00 ± 5.00 | 0.00 | 28.00 | 17.00 ± 6.00 | 5.00 | 30.00 |
| 12 years old | 18.00 ± 7.00 | 2.00 | 35.00 | 19.00 ± 6.00 | 6.00 | 33.00 | 10.00 ± 5.00 | 0.00 | 26.00 | 14.00 ± 7.00 | 1.00 | 27.00 |
| Sit-up (reps) | ||||||||||||
| 6 years old | 3.00 ± 3.00 | 0.00 | 11.00 | 5.00 ± 4.00 | 0.00 | 17.00 | 2.00 ± 3.00 | 0.00 | 12.00 | 6.00 ± 4.00 | 0.00 | 15.00 |
| 9 years old | 17.00 ± 6.00 | 0.00 | 32.00 | 21.00 ± 6.00 | 2.00 | 50.00 | 15.00 ± 6.00 | 0.00 | 28.00 | 18.00 ± 5.00 | 0.00 | 32.00 |
| 12 years old | 11.00 ± 4.00 | 0.00 | 19.00 | 15.00 ± 7.00 | 2.00 | 60.00 | 8.00 ± 5.00 | 0.00 | 21.00 | 13.00 ± 5.00 | 0.00 | 26.00 |
| Wall-sit (s) * | ||||||||||||
| 6 years old | 49.00 ± 15.00 | 100.0 | 60.00 | 40.00 ± 20.00 | 6.00 | 60.00 | 50.00 ± 15.00 | 10.00 | 60.00 | 40.00 ± 19.00 | 8.00 | 60.00 |
| 9 years old | 58.00 ± 7.00 | 23.00 | 60.00 | 54.00 ± 12.00 | 14.00 | 60.00 | 56.00 ± 10.00 | 20.00 | 60.00 | 54.00 ± 14.00 | 6.00 | 60.00 |
| 12 years old | 60.00 ± 3.00 | 42.00 | 60.00 | 59.00 ± 4.00 | 34.00 | 60.00 | 59.00 ± 6.00 | 18.00 | 60.00 | 57.00 ± 9.00 | 10.00 | 60.00 |
| V-up (s) * | ||||||||||||
| 6 years old | 46.00 ± 17.00 | 7.00 | 60.00 | 40.00 ± 19.00 | 0.00 | 60.00 | 41.00 ± 20.00 | 0.00 | 60.0 | 42.00 ± 18.00 | 0.00 | 60.00 |
| 9 years old | 53.00 ± 12.00 | 14.00 | 60.00 | 56.00 ± 11.00 | 7.00 | 60.00 | 50.00 ± 17.00 | 0.00 | 60.0 | 52.00 ± 14.00 | 3.00 | 60.00 |
| 12 years old | 53.00 ± 12.00 | 10.00 | 60.00 | 54.00 ± 11.00 | 10.00 | 60.00 | 50.00 ± 13.00 | 20.00 | 60.0 | 53.00 ± 14.00 | 5.00 | 60.00 |
| VO2max (mL/kg/min) ^ | ||||||||||||
| 9 years old | 44.20 ± 5.20 | 35.70 | 60.30 | 43.00 ± 4.40 | 35.80 | 57.30 | 40.80 ± 2.90 | 35.70 | 54.60 | 40.90 ± 3.20 | 36.30 | 50.90 |
| 12 years old | 44.40 ± 5.50 | 33.30 | 59.70 | 44.60 ± 6.80 | 33.20 | 60.30 | 38.50 ± 3.60 | 33.20 | 51.30 | 39.80 ± 6.00 | 32.60 | 59.10 |
* 60 s was the maximum requirement to score full points for the wall-sit and V-up sub-tests. cm = Centimeters; M = Mean; Max = Maximum value; Min = Minimum value; reps = Repetitions; SD = Standard deviation; sec = Seconds; SES = Socioeconomic status; ^ = Not measured in 2010.