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 .
Influencing Factors on the Overestimation of Self-Reported Physical Activity: A Cross-Sectional Analysis of Low Back Pain Patients and Healthy Controls
Introduction . The aim of the present study was to determine the closeness of agreement between a self-reported and an objective measure of physical activity in low back pain patients and healthy controls . Beyond , influencing factors on overestimation were identified . Methods . 27 low back pain patients and 53 healthy controls wore an accelerometer ( objective measure ) for seven consecutive days and answered a question naire on physical activity ( self-report ) over the same period of time . Differences between self-reported and objective data were tested by Wilcoxon test . Bl and -Altman analysis was conducted for describing the closeness of agreement . Linear regression models were calculated to identify the influence of age , sex , and body mass index on the overestimation by self-report . Results . Participants overestimated self-reported moderate activity in average by 42 min/day ( p = 0.003 ) and vigorous activity by 39 min/day ( p < 0.001 ) . Self-reported sedentary time was underestimated by 122 min/day ( p < 0.001 ) . No individual-related variables influenced the overestimation of physical activity .  Low back pain patients were more likely to underestimate sedentary time compared to healthy controls . Discussion . In rehabilitation and health promotion , the application-oriented measurement of physical activity remains a challenge . The present results contradict other studies that had identified an influence of age , sex , and body mass index on the overestimation of physical activity
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 .