Platelet-Rich Plasma Injections for the Treatment of Hamstring Injuries: A Randomized Controlled Trial
Background: A hamstring injury is one of the most common types of injury affecting athletes. Despite this, the optimal management of hamstring muscle injuries is not yet defined. The effect of autologous platelet-rich plasma (PRP) therapy on the recovery
of hamstring injuries is unclear.
Purpose: To investigate the effect of a single PRP injection in the treatment of grade 2 hamstring muscle injuries.
Study Design: Randomized controlled trial; Level of evidence, 2.
Methods: Twenty-eight patients diagnosed with an acute hamstring injury were randomly allocated to autologous PRP therapy
combined with a rehabilitation program or a rehabilitation program only. The primary outcome of this study was time to return to
play. In addition, changes in pain severity and pain interference scores over time were examined.
Results: Patients in the PRP group achieved full recovery significantly earlier than controls (P = .02). The mean time to return to
play was 42.5 6 20.6 days in the control group and 26.7 6 7.0 days in the PRP group. Significantly lower pain severity scores
were observed in the PRP group throughout the study. However, no significant difference in the pain interference score was found
between the 2 groups.
Conclusion: A single autologous PRP injection combined with a rehabilitation program was significantly more effective in treating
hamstring injuries than a rehabilitation program alone.