Exercise for patellar tendinopathy.

Patellar tendinopathy causes pain at the front of the knee, just below the kneecap, and exercise is the treatment most often used, especially strengthening exercises like eccentric loading. This Cochrane review asked how strengthening exercise compares to no treatment, glucocorticoid injection, surgery, stretching, or other physical therapies, pooling seven randomized trials with 211 participants, all athletes, mostly male, with an average symptom duration of nearly 3.5 years. Results were mixed and mostly uncertain. Compared to no treatment, exercise may reduce pain but the evidence is very uncertain, and it made little or no clear difference to function.

Compared to glucocorticoid injection, exercise made little or no difference to pain or function. Compared to surgery, findings on pain and function were very uncertain, while treatment success and return to sport rates looked similar. No trials measured adverse events, and most had risk of bias concerns including lack of blinding and incomplete follow-up.

If you've dealt with patellar tendinopathy, often called jumper's knee, you know how persistent that pain below the kneecap can be. Researchers pulled together seven small trials involving 211 athletes, mostly men in their mid-20s who had been dealing with symptoms for an average of over three years, to see how strengthening exercises compared to other treatments. The picture that emerged wasn't clear-cut.

When compared to doing nothing, exercise seemed to reduce pain, but the researchers rated this evidence as very uncertain, meaning future studies could change this conclusion substantially. Exercise made little difference to function compared to no treatment, and little difference to pain or function compared to a steroid injection.

Compared to surgery, results on pain and function were again very uncertain, though rates of returning to sport looked similar between groups. A key limitation is that all the studies involved athletes, so these findings may not apply to people with patellar tendinopathy in the general population. No trials tracked adverse events, so nothing can be said about safety of either approach.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

This Cochrane systematic review pooled seven RCTs (211 participants) evaluating strengthening exercise for chronic patellar tendinopathy in athlete populations (88% male, mean age 26, mean symptom duration 41.6 months), comparing exercise against no treatment, glucocorticoid injection, surgery, stretching, or pulsed ultrasound with transverse friction. No trials compared exercise to placebo or sham. Certainty was consistently low to very low across comparisons.

Versus no treatment, a single 39-participant study suggested a large pain reduction (MD 34.94 points on a 0-100 scale) but this was downgraded for imprecision and bias; function showed no clear difference across two studies (95 participants). Versus glucocorticoid injection, one 38-participant trial found little or no difference in pain or function.

Versus surgery, one 40-participant trial produced very uncertain estimates for pain and function, with low-certainty findings of little difference in treatment success and return to sport (86% surgery vs 85% exercise). Risk of bias was substantial across trials, including allocation concealment issues, attrition, and inevitable lack of blinding given the intervention type. No adverse events were reported or assessed.

The exclusive focus on athletic populations limits generalizability to non-athletic patients with this condition.