Fig. 2
Effect of 12-week intervention with judo or ball games training on the sleep quality of children and adolescents. *Significant difference between pre versus post within groups. Mini-sleep score = values expressed as mean and standard deviation. (The higher the score, the worse the sleep quality.) Effect size between groups was 0.17 and power of 0.70, with a significant main effect for time (P = 0.007) and non-significant group by time interaction (P = 0.612)