Methodological quality score | 20 | 20 | 17 |
Sex | Male | Male | Male |
Age (years) | 20–35 | 17–31 | NA |
Population | Prison inmates | Military recruits | Military recruits |
Intervention | Effects of duration and frequency of training | Reduction in running distance | Graduated running |
Protocol | Duration group: train 15, 30, 45 minutes/day | Substitute running with walking plus added weight | Graduated running programme for the first 2 weeks |
| frequency group: train 1, 3, 5 days/week | | |
Period of intervention (weeks) | 20 | 12 | 2 |
Hours of exposure to running/week | 0.75–2.50 | 41.3 | NA |
Definition of injury | Training related injury that prevented subjects from running for at least one week | Medical confirmation | Medical confirmation |