Study 1. Eligibility criteria specified1 2. Random allocation 3. Concealed allocation 4. Baseline Similarity 5. Blinding of subjects 6. Blinding of health professio-nal 7. Blinding of assessors 8. Measures of key outcomes in >85% 9. ITT2 10.  Between group statistical comparison 11.      Point and variability measures Total score3 One-way Interactivity Lombard (2010) [53] P4 1 1 1 1 0 1 1 1 1 1 9 Lee (2011) [35] P 0 0 1 0 0 0 0 0 1 0 2 One-way Interactivity Haapala (2009) [19] P 1 0 1 0 1 1 0 1 1 1 7 Patrick (2009) [6] P 1 1 1 0 0 0 0 0 1 1 5 Joo (2010) [32] P 0 0 0 0 0 0 0 0 1 1 2 Turner-McGrievy (2011) [54] P 1 0 1 0 0 0 1 1 1 1 6 1 This item influences external validity of a study. It is different from the remaining PEDro items, which pertains to internal validity. Therefore, it is not included in the calculation of the final PEDro score (http://www.pedro.org.au/english/downloads/pedro-scale/). 2ITT indicates the statistical analysis involved an intention-to-treat analysis. 3 The total score is the sum of Items 2-11 (higher score=higher quality). A score of ≥ 6 indicates a study of high methodological quality. 4P:Present

Table 3: Assessment of study methodological quality