Ketelhut 2020.
| Study characteristics | ||
| Methods | Study design: cluster‐RCT | |
| Participants |
School inclusion criteria: within a pool of project schools from another study School exclusion criteria: ‐ Student inclusion criteria: third grade, written parental/guardian consent Student exclusion criteria: health conditions that did not allow unrestricted physical activity Setting: school Age group: children Gender distribution: females and males Country where trial was performed: Germany |
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| Interventions |
Intervention: high‐intensity interval training incorporated into the first 20 minutes of regular PE classes (1 × 45 minutes and 1 × 90 minutes per week) Comparator: regular PE classes (1 × 45 minutes and 1 × 90 minutes per week) Duration of intervention: 12 weeks Duration of follow‐up: ‐ Number of schools: 1 Theoretical framework: ‐ |
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| Outcomes | Fitness | |
| Study registration | ‐ | |
| Publication details |
Language of publication: English Funding: ‐ Publication status: peer‐reviewed journal |
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| Stated aim for study | "the aim of the present study was to examine the effects of a regular school‐based and child‐specific high intensity interval training intervention not only on aerobic fitness and peripheral blood pressure but moreover on different parameters of arterial stiffness" | |
| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Low risk | Quote from publication: "randomisation was carried out by the principal investigator using a computer‐generated random number table" |
| Allocation concealment (selection bias) | Unclear risk | Comment: not described |
| Blinding of participants and personnel (performance bias) All outcomes | Unclear risk | Comment: not described; not likely done |
| Blinding of outcome assessment (detection bias) All outcomes | Unclear risk | Comment: not described |
| Incomplete outcome data (attrition bias) Anthropometrics, Fitness | Unclear risk | Comment: not described |
| Selective reporting (reporting bias) | Unclear risk | Comment: no protocol or registry document available. |
| Cluster RCT ‐ Recruitment bias | Unclear risk | Comment: not described |
| Cluster RCT ‐ Baseline imbalance | Low risk | Comment: no baseline differences |
| Cluster RCT ‐ Loss of clusters | Low risk | Comment: no clusters lost |
| Cluster RCT ‐ Incorrect analysis | High risk | Comment: analyses not adjusted for clustered nature of data |