Do physical activity interventions combining self-monitoring with other components provide an additional benefit compared with self-monitoring alone? A systematic review and meta-analysis.

"Competing interests: None declared."

"Funding: This work was supported by the Czech Health Research Council of the Ministry of Health of the Czech Republic (Grant Number NU21-09-00007)."

"The final protocol of this review and meta-analysis slightly deviated from the originally registered protocol (, PROSPERO CRD42020199482) in the following aspects: (1) The EMBASE database was not searched because we lost access to it. However, Web of Science and ProQuest databases were searched instead of EMBASE; (2) As nearly all the studies reported daily step count as the PA outcome, we did not perform meta-analyses with minutes of MVPA and other outcomes as originally intended. Only 19 studies reported minutes of MVPA, and 15 of these also reported step count; (3) Consequently, not mixing step count and minutes of MVPA in one meta-analysis allowed us to use an absolute MD in daily steps instead of a standardised MD (Hedge’s g) as the measure of effect; and (4) The moderator analysis was performed using the meta-regression instead of subgroup analysis. PROSPERO registered number: CRD42020199482."