***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: Two trials were included in the review, totaling 104 participants. One trial assessed additional (four times a day) versus once daily stretching and the other assessed exercise for movement dysfunction versus stretching and strengthening. The first trial, involving 80 elite athletes, suggested additional stretching could reduce time to return to full activity (mean difference (MD) -1.8 days, 95% confidence interval (CI) -2.1 to -1.5, P < 0.001). The second trial, involving 24 participants from a diverse sporting background, did not find conclusive evidence of a difference (MD -14.5 days, 95% CI -30.64 to 1.64, P = 0.08). It did, however, report reduced re-injury rates using exercise for movement dysfunction of 8% versus 64% (odds ratio (OR) 0.05, 95% CI 0.00 to 0.52, P = 0.01). No other outcomes relevant to this review were reported by either study: most notably pain and participant satisfaction. Most proposed physiotherapy techniques for rehabilitation of hamstring injuries have not been assessed using randomised trials. Those that have only have single studies with a limited range of participants and outcomes. There is limited evidence to suggest that time to recovery for elite athletes can be reduced with an increased daily frequency of hamstring stretching exercises. There is preliminary evidence from another small study of mixed ability athletes to suggest that exercise to correct movement dysfunction could reduce time to return to full activity and the risk of re-injury. Further studies are required to check these findings. Until further evidence is available, current practice and widely published rehabilitation protocols cannot either be supported or refuted.
Output:

Only two randomised studies, totaling 104 participants, were found that compared rehabilitation programmes for this condition. This means that many proposed techniques have not been subjected to proper scrutiny. There is limited evidence from one study to suggest that rate of recovery can be increased with an increased daily frequency of hamstring stretching exercises. There is preliminary evidence from another small study of mixed ability athletes to suggest that exercise to correct movement dysfunction could reduce time to return to full activity and the risk of re-injury. Further studies are required to check these findings and to inform on current practice and the widely published rehabilitation protocols for these injuries.