Ford 2013.

Study characteristics
Methods	Study design: RCT
Participants	Student inclusion criteria: aged 5 to 11 years, from 2 primary schools located within the southeast of England Student exclusion criteria: — Setting: school Age group: children Gender distribution: females and males Country/Countries where trial was performed: UK
Interventions	Intervention: accumulated brisk walking programming during school time Comparator: normal school lessons during walking sessions, which involved seated literacy work Duration of intervention: 15 weeks Duration of follow‐up: 15 weeks Number of schools: 2 Theoretical framework: —
Outcomes	PA duration BMI
Study registration	—
Publication details	Language of publication: English Funding: — Publication status: peer‐reviewed journal
Stated aim for study	"The purpose of this study was to determine whether a 15‐week accumulated brisk walking programme, performed within a primary school setting, is effective in eliciting changes in body composition in 5‐ to 11‐year‐olds"
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote from publication: "participants were divided into 2 groups using the random number generation function in SPSS"
Allocation concealment (selection bias)	Unclear risk	Comment: not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: participants not blinded
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: not described
Incomplete outcome data (attrition bias) Anthropometrics, Fitness	Unclear risk	Comment: 22 dropped out; study authors do not indicate which group they were from
Incomplete outcome data (attrition bias) Physical activity and sedentary time	Unclear risk	Comment: 22 dropped out; study authors do not indicate which group they were from
Selective reporting (reporting bias)	Unclear risk	Comment: no protocol published