Table 2.
Subject Demographics by USA-Gymnastics Competitive Level
| Competition Level | 4 | 5 | 6 | 7 | 8 | 9 | 10 | All Subjects |
|---|---|---|---|---|---|---|---|---|
| Number of Subjects | 20 | 12 | 20 | 7 | 8 | 6 | 10 | 83 |
| Mean Age in Years (sd) | 8.3 (1.3) | 9.2 (1.3) | 10.6 (1.6) | 12.3 (0.8) | 13.3 (1.7) | 12.8 (0.8) | 16.2 (1.1) | 11.1 (2.9) |
| Mean Years Competing | 1.4 | 2.7 | 4.4 | 5.14 | 5.7 | 6.7 | 9.5 | 4.4 (2.9) |
| Mean Reported Number of Hours Practicing per Week | 8.5 | 10.7 | 14.5 | 20.8 | 17.7 | 18.7 | 21.4 | 14.5 (5.4) |
| Mean Height in cm (sd) | 129 (9.9) | 135 (9.3) | 142 (12.8) | 149 (7.6) | 154 (15.4) | 149 (4.9) | 163.8 (3.8) | 142.8 (15.0) |
| Mean Weight in kg (sd) | 28.2 (6.4) | 29.7 (6.1) | 35.1 (8.1) | 39.5 (4.8) | 48.8 (14.9) | 43.1 (5.3) | 56.6 (4.2) | 82.9 (26.5) |
sd = Standard Deviation, cm = Centimeters, kg = Kilograms