EffectivenessofInclusionofDryNeedlinginaMultimodalTherapyProgramforPatellofemoralPain:ARandomizedParallel-GroupTrial

Patellofemoral pain (PFP) is one of the most common knee conditions, affecting 25-40% of knee complaints and 25% of the general population. It causes diffuse pain around and behind the kneecap that worsens with activities like squatting, prolonged sitting, and stair climbing. Current treatment guidelines recommend multimodal therapy including strengthening exercises, manual therapy, education, and activity modification. Trigger points in muscles around the knee may contribute to PFP symptoms, and dry needling has shown promise for treating trigger points in other body regions, but no studies had examined its effectiveness specifically for patellofemoral pain.

Researchers recruited 60 people with chronic patellofemoral pain from a hospital in Valencia, Spain. Participants had to have anterior knee or kneecap pain for at least 6 months that was triggered by at least two activities like prolonged sitting, squatting, or stair walking. They were randomly assigned to two groups: one receiving manual therapy and exercises alone (30 people), and another receiving the same treatment plus trigger point dry needling (30 people). Both groups received three 30-40 minute treatment sessions over three weeks.

The manual therapy included joint manipulations of the spine, hip, knee, and ankle, plus muscle stretching and tissue work. The exercise program consisted of mini-squats, seated knee extensions, lunges, and lateral steps performed in 3 sets of 15 repetitions. The dry needling group also received needling to active trigger points in the vastus medialis and vastus lateralis muscles (parts of the quadriceps). Researchers measured pain, function, and disability using validated questionnaires at the start, after treatment ended (15 days), and at 3 months.

Both groups experienced significant improvements in pain and function, but adding dry needling provided no additional benefit over manual therapy and exercise alone. At 3 months, 97% of participants completed follow-up (58 out of 60). There were no significant differences between groups for any outcome measure. Both groups showed moderate to large improvements from baseline, but only one measure (sport and recreation function) exceeded the threshold considered clinically meaningful.

In the dry needling group, 40% of patients experienced temporary muscle soreness lasting 36-48 hours, but no other side effects occurred. Pain scores improved from about 5.2 to 3.6-3.9 points on a 0-10 scale in both groups.

This study suggests that while manual therapy combined with strengthening exercises may be helpful for patellofemoral pain, adding dry needling to trigger points in the thigh muscles doesn't provide extra benefits. Both treatments led to similar improvements in pain and function that lasted at least 3 months. The results support using multimodal therapy approaches for patellofemoral pain, but question whether the expense and potential discomfort of dry needling is worthwhile for this condition. However, the study only tested 3 sessions targeting 2 specific muscles, so it's possible that different dry needling protocols might be more effective.

More research is needed to determine the optimal treatment approach for patellofemoral pain, and to identify if certain patients might benefit more from dry needling than others.