Conclusions Leisure time physical activity may reduce the risk of chronic LBP by 11%–16 % .
Background There are plausible mechanisms whereby leisure time physical activity may protect against  low back pain ( LBP )  but there have been no quality systematic review s and meta-analyses of the subject .
Objective This review aims to assess the effect of leisure time physical activity on non-specific LBP .
High-level physical activity in childhood seems to protect against low back pain in early adolescence.
BACKGROUND The evidence on the impact of physical activity on  back pain in children and adolescents has been contradicting . It has also been shown that the physical activity can not accurately be estimated in children using question naires . PURPOSE The aim of this study was to establish if physical activity in childhood had any impact on back pain reporting in early adolescence ( 3 years later ) , using an objective instrumental measurement of physical activity . STUDY DESIGN Prospect i ve cohort study . PATIENT SAMPLE Representative r and om sample of Danish children from the city of Odense sample d at age 9 years and followed-up at age 12 years . OUTCOME MEASURES The 1-month period prevalence of back pain ( neck pain , mid back pain , and low back pain ) was established using a structured interview . METHODS  Physical activity  was assessed with the MTI-accelerometer . The accelerometer provides a minute-by-minute measure of the physical activity performed . An overall measure of physical activity and time spent in high activity were studied in relation to back pain using logistic regression . The analyses were performed on the total sample and then stratified on back pain ( yes/no ) at baseline . RESULTS High physical activity ( HPA ) levels seem to protect against future low back pain and appear to actually " treat " and reduce the odds of future mid back pain . When comparing the least active children to the most active children , the least active had a multivariate odds ratio of 3.3 of getting low back pain and 2.7 of getting mid back pain 3 years later . When stratified on back pain at baseline , this effect on mid back pain was especially noticeable in children who had had mid back pain already at baseline , with an odds ratio of 7.2 . CONCLUSIONS HPA in childhood seems to protect against low back pain and mid back pain in early adolescence . Larger prospect i ve studies with repetitive follow-ups and preferably intervention studies should be performed , to see if these findings can be reproduced
Conclusions Leisure time physical activity may reduce the risk of chronic LBP by 11%–16 % .
Background There are plausible mechanisms whereby leisure time physical activity may protect against  low back pain ( LBP )  but there have been no quality systematic review s and meta-analyses of the subject .
Objective This review aims to assess the effect of leisure time physical activity on non-specific LBP .