Sprinting ability
A 50-m sprint test was performed to assess their sprinting ability in which each participant undertook a 50-m sprint and passed through an automatic photocell timer (Brower Timing System, United States). When the children heard a sound signal, they began to sprint at the fastest speed, and the timer system was activated simultaneously. Two sets of photocells were fixed at the starting position and the 50-m gates. The timing results from the finishing line were recorded as the final test result. Each participant performed two sprinting tests with appropriate passive recovery between each test, and the best test was selected as the result of the statistical analysis.