The ANCOVA analysis of the null hypothesis measurements 1–4 revealed no difference in post-ROM scores between control and experimental groups after controlling for pre-ROM (Table 3). ROM scores among the control group were slightly lower than those for the intervention group. Knee bent right flexion remained static among the intervention group and went up slightly for the control group. While knee bent left flexion increased slightly for controls, it went down slightly for those in the intervention group; however, this change in scores was not large enough to be significant. Both knee straight right extension and knee straight left extension decreased for both groups, but no significant difference in change was found.