Effect of a Psychologically Informed Intervention to Treat Adolescents With Patellofemoral Pain: A Randomized Controlled Trial.

Adolescents with patellofemoral pain, the aching around or behind the kneecap common in active teens, often carry beliefs about pain being dangerous or something to fear, and researchers wanted to know whether directly addressing those beliefs alongside standard physical therapy could help. In this trial, teens received either a brief video aimed at reducing pain-related fear and catastrophizing, or a control video about knee anatomy, alongside their usual physical therapy. Function improved more in the psychologically informed group than the control group, with the difference emerging early and not growing further between two weeks and three months. The video group also showed reduced fearful and catastrophizing beliefs, though pain levels themselves did not differ significantly between groups.

The main limitation is that this was a small trial of 66 adolescents, so while the early functional benefit is notable, its durability and generalizability remain uncertain.

If you're a teen dealing with kneecap pain, or a parent of one, this study looked at whether adding a short video about pain beliefs, alongside regular physical therapy, could help more than physical therapy alone. One group watched a video explaining how fear of pain and negative thinking about pain can affect recovery, while the other group watched a video just explaining basic knee anatomy. Teens who watched the psychology-focused video showed greater improvement in knee function early in treatment compared to those who watched the anatomy video, and they also reported less fear and less catastrophic thinking about their pain.

However, their actual pain levels weren't significantly different between the two groups, and the extra improvement in function seen early on didn't keep growing over the following weeks. This was a small study of 66 adolescents, so these findings offer an interesting early signal rather than a settled answer about how psychological education should factor into treating this common teen knee condition.

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

This double-blind randomized controlled trial (n=66, mean age 14.8 years, 65% female) compared a brief psychologically informed video targeting pain-related fear and catastrophizing (n=34) against a control anatomy-education video (n=32), both added to standard physical therapy for adolescent patellofemoral pain. The primary outcome, function measured via the Anterior Knee Pain Scale, showed a statistically significant group-by-time interaction favoring the intervention (P=.001, partial η²=0.1, a moderate effect), with post hoc analysis localizing the significant interaction to baseline through two weeks; no further interaction was detected between two weeks and three months, indicating the early gain did not continue accruing. Secondary outcomes showed a significant reduction in maladaptive psychological beliefs (fear-avoidance, kinesiophobia, catastrophizing) in the intervention group (P=.01, η²=0.32), a comparatively large effect, but no significant between-group difference in pain. Clinicians should note this is a single-center trial with a modest sample size, and the plateau after two weeks raises questions about durability and whether a single video dose is sufficient, findings that warrant replication before drawing firm conclusions about long-term functional or clinical impact.