Comparing myofascial meridian activation during single leg vertical drop jump in patients with anterior cruciate ligament reconstruction and healthy participants.

Researchers studied how muscles work together along connected pathways called myofascial meridians during jumping and landing tasks in athletes who had anterior cruciate ligament (ACL) reconstruction surgery compared to healthy athletes. The study involved 32 male athletes performing single-leg drop jumps while muscle activity was measured using surface electrodes. The findings revealed significant differences in how muscles activate along the front and back body lines between those who had ACL surgery and healthy participants. Healthy athletes showed greater activation in their core and inner thigh muscles (front line), while ACL reconstruction patients relied more heavily on their outer thigh and gluteal muscles (back line). Interestingly, ACL patients also showed imbalances between their injured and non-injured legs, suggesting compensatory movement patterns that may increase re-injury risk. These muscle activation patterns align with traditional concepts in acupuncture and myofascial medicine, where the body functions through interconnected chains or meridians rather than isolated muscles. The altered activation patterns observed after ACL reconstruction suggest that treatment approaches addressing these functional lines as complete units, rather than individual muscles, may be beneficial. For patients recovering from ACL injury or other lower body injuries, acupuncture treatment focused on restoring balanced activation along these myofascial meridians could potentially improve movement patterns and reduce re-injury risk. If you're considering acupuncture for sports injury recovery or movement rehabilitation, consult with a licensed acupuncturist who has experience treating athletic injuries and understands functional movement patterns.

This study examined myofascial meridian activation during single-leg vertical drop jump in 16 male post-ACLR patients versus 16 healthy controls (mean age 23.3±2.3 years). Surface EMG measured front functional line (FFL: adductor longus, rectus abdominis, pectoralis major) and back functional line (BFL: vastus lateralis, gluteus maximus, latissimus dorsi) activation at initial contact and maximum knee flexion. Results showed healthy participants demonstrated significantly greater FFL activation (AL, RA at both phases; PM at maximum flexion only), while ACLR patients showed greater BFL activation in VL and GMax but reduced LD activation (p<0.05). ACLR participants exhibited inter-limb asymmetries: greater non-injured limb VL, AL, GMax, and LD activation with greater injured limb PM and RA activation (p<0.05). Clinical implications suggest ACLR patients develop altered myofascial chain recruitment patterns that may increase re-injury risk, supporting meridian-based treatment approaches targeting functional line restoration rather than isolated muscle rehabilitation.