Sample size
Non-probability purposive sampling was used to recruit participants into the trial. The sample size was calculated based on the data provided by the pilot study. The pilot study was done on 20 patients and sample size calculation was based on the Lysholm score of this study using the mean Lysholm score in the experimental group (70.5 ± 20.695), and in control group (55.50 ± 11.07) using 80% power of test, 95% confidence interval and 5% margin of error. The 96 participants were randomized into two groups, with 48 patients in each group by adding 20% drop out rate. This sample size was also sufficient for VISA-P score and KOOS scales.