Summary of physical activity reported in meta-analysed studies and meta-analysis results
| Type of study included | N studies | Age range adolescence | Age range adulthood | Mean (SD) follow-up (years) | Mean (SD) adolescent MVPA min/day | Pooled WMD (95% CI) | I2 (%) |
| All eligible studies | 49 | 13–19 | 16–30 | 3.4 (2.6) | 41.0 (29.1) | −5.2 (−7.3 to -3.1) | >99.0 |
| All eligible studies (males) | 29 | 13–19 | 16–30 | 4.2 (2.8) | 49.1 (31.1) | −6.5 (−10.6 to -2.3) | >99.0 |
| All eligible studies (females) | 30 | 13–19 | 16–30 | 3.8 (2.8) | 37.2 (27.8) | −5.5 (−8.4 to -2.6) | >99.0 |
| Accelerometer only | 9 | 13–19 | 16–30 | 4.3 (2.9) | 43.5 (16.8) | −7.4 (−11.6 to -3.1) | 95.0 |
| Non-accelerometer | 40 | 13–19 | 16–30 | 3.2 (2.5) | 40.4 (31.4) | −4.8 (−7.0 to -2.5) | >99.0 |
| Restricted ages | 3 | 13–15 | 18–30 | 7.4 (3.4) | 47.9 (15.0) | −8.2 (−23.8 to 7.5) | 89.7 |
Restricted ages: restricting the age of baseline to ≤15 years old and ≥18 years old at follow-up.
MVPA, moderate-to-vigorous physical activity; WMD, weighted mean difference.