Results suggest that youth with JIA participated less in both  social and physical leisure activities  as compared to healthy peers , and those with JIA did not meet national recommendations for physical activity .
Characterization of leisure activity remains limited and mostly focused on physical activity in JIA .
UNLABELLED The aim of this systematic review is to describe participation in social and physical leisure activities among children and adolescents with JIA , as well as identify potential determinants of leisure participation .
The effects of vigorous exercise training on physical function in children with arthritis: a randomized, controlled, single-blinded trial.
OBJECTIVE To examine the effectiveness of high-intensity aerobic training compared with low-intensity training in terms of energy cost of locomotion , peak oxygen uptake , peak power , and self-reported physical function in children with juvenile idiopathic arthritis ( JIA ) . METHODS Eighty children with JIA , ages 8 - 16 years , were enrolled in a r and omized , single-blind controlled trial . Both groups participated in a 12-week , 3-times-weekly training program consisting of high-intensity aerobics in the experimental group and qigong in the control group . Subjects underwent exercise testing measuring submaximal oxygen uptake at 3 km/hour ( VO(2submax ) ) as the primary outcome , maximal oxygen uptake , and peak power at the beginning and end of the program . Physical function was measured using the Child Health Assessment Question naire ( C-HAQ ) . RESULTS The exercise program was well tolerated in both groups . There was no difference in VO(2submax ) or any other exercise testing measures between the groups through the study period and no indication of improvement . Both groups showed significant improvements in C-HAQ with no difference between the groups . Adherence was higher in the control group than the experimental group . CONCLUSION Our findings suggest that activity programs with or without an aerobic training component are safe and may result in an important improvement in physical function . The intensity of aerobic training did not seem to provide any additional benefits , but higher adherence in the qigong program may suggest that less intensive regimens are easier for children with JIA to comply with , and provide a degree of benefit equivalent to more intensive programs
Results suggest that youth with JIA participated less in both  social and physical leisure activities  as compared to healthy peers , and those with JIA did not meet national recommendations for physical activity .
Characterization of leisure activity remains limited and mostly focused on physical activity in JIA .
UNLABELLED The aim of this systematic review is to describe participation in social and physical leisure activities among children and adolescents with JIA , as well as identify potential determinants of leisure participation .