Figure 1
From: Physical fitness of primary school children differs depending on their timing of school enrollment
Performance (means and 95% CIs) in six physical fitness tests for keyage children (blue) and OTK children (red). The lines represent the physical fitness development from third to fourth, and from fourth to fifth grade. Keyage children were approximately 8.5 years in third, 9.5 years in fourth, and 10.5 years old in fifth grade, OTK children were approximately 9.5 years in third, 10.5 years in fourth, and 11.5 years old in fifth grade. Data were z-transformed. Endurance = cardiorespiratory endurance (i.e., 6-min-run test), Coordination = star-run test, Speed = 20-m linear sprint test, PowerLOW = lower limbs muscle power (i.e., standing long jump test), PowerUP = upper limbs muscle power (i.e., ball-push test), Balance = static balance (i.e., one-legged-stance test with eyes closed). For coordination and speed, scores were converted from seconds to meters/seconds (i.e., pace scores; star-run test = 50.912 [m]/time [s]; 20-m linear sprint test = 20 [m]/time [s]). For static balance, scores were log-transformed. For all physical fitness tests, a larger z-score indicates a better physical fitness.
