Hamstring injuries don’t explode like ACLs. They don’t swell dramatically. They just…linger. And if you treat athletes long enough, you know the real pressure isn’t the MRI. It’s the calendar.
So here’s the question surgeons keep hearing — from athletes, agents and coaches alike: Can PRP get me back faster?
A new systematic review and meta-analysis takes a hard look at percutaneous platelet-rich plasma (PRP) injections for acute hamstring muscle injuries. No case series. No chronic tendinopathy detours. Just randomized controlled trials (RCTs).
Six Trials, 277 Athletes, One Big Promise
The authors analyzed six RCTs (n=277) comparing PRP to standard treatment or placebo for acute hamstring strains. They focused on what matters most in this population: return-to-play (RTP) time.
Across pooled data, PRP shortened RTP by an average of 8.6 days.
PRP group: 21.4 days. Control group: 30.0 days. Statistically significant (p=0.045).
Eight days is not a rounding error. It’s a playoff game. It’s a tournament.
But before you start pre-loading syringes, there’s nuance.
The Catch: Variability Everywhere
Heterogeneity was high (I² = 94.1%). The study trials were not hardly identical.
Different PRP preparations. Different injection timing. Different rehab protocols. Different imaging guidance.
If orthobiologics have a recurring theme, it’s this: execution of this promising biologic treatment varies wildly.
Interestingly, image-guided injections appeared to show more favorable results — which should not surprise most sports medicine physicians. Precision matters — even in muscle.
The Durability Question
Getting back faster is only helpful if you stay back.
Reinjury rates? PRP: 15% Control: 16% No significant difference.
PRP did not meaningfully reduce retear risk.
Safety? Essentially a wash. Adverse events were rare in both groups (1% vs 0%).
So PRP doesn’t appear harmful. It just doesn’t appear protective, either.
What Surgeons Should Make of This
PRP may buy you about a week. It likely won’t change reinjury rates. It probably won’t hurt your patient. And it definitely won’t standardize itself.
The certainty of evidence was rated low to moderate due to risk of bias and imprecision. Sample sizes were modest. Protocols inconsistent. “PRP” still means different things in different hands.
For pain docs, sports medicine physicians, and trainers counseling competitive athletes, this becomes a conversation about expectations. An eight-day acceleration might be worth it in high-level sport. In recreational athletes, maybe less so.
PRP for acute hamstring injuries isn’t magic. It’s not useless either.
It lives in that very orthopedic middle ground: biologically plausible, modestly supported, and highly dependent on how — and why — you use it.
Origin Study Title Link: Effects of percutaneous platelet-rich plasma injection on return-to-play after acute hamstring muscle injury: systematic review and meta-analysis
Authors: Hirotaka Nakagawa, Patrick Krochmal, Ian Thomas, Judy B Rabinowitz, Ryan C Kruse, Robert Bowers, Walter I Sussman