Table 1

The search strategy used in Medline (Ovid Web)

1.randomized controlled trial.pt.
2.controlled clinical trial.pt.
3.randomized controlled trials/
4.random allocation/
5.double blind method/
6.single blind method/
7.or/1–6
8.animal/ not human/
9.7 not 8
10.clinical trial.pt.
11.exp clinical trials/
12.(clinic$ adj25 trials$).tw.
13.((singl$ or doubl$ or trebl$ or tripl$) adj25 (blind$ or mask$)).tw.
14.placebos/
15.placebo$.tw.
16.random$.tw.
17.research design/
18.or/10–17
19.18 not 8
20.19 not 9
21.or/9,20
22.exp running/
23.athletic injuries/
24.soft tissue injuries/
25.sprains and strains/ or cumulative trauma disorders/
26.hip injuries.mp
27.knee injuries/
28.ankle injuries/
29.foot injuries/
30.tendinitis/
31.fasciitis/
32.sports/
33.sports medicine/
34.physical education and training/
35.physical fitness/
36.or/22–35
37.and/9,36
38.and/20,36
39.or/37–38