Great post by @thefreshmanphysio! 😊👍
“⛹♂Compensations are reducing quad demand when squatting 3-5 months post-ACL Reco!🤾♂
1⃣ Assess loading patterns in a bilateral squat in individuals following ACLR at 3 months and 5 months postop.
2⃣Determine how compensations contribute to reduced knee extensor moments.
11 patients underwent a 3-d motion analysis and were asked to perform squats on a force platform. They were instructed to squat down as low as possible without pain and performed 2 trials of 5 consecutive squats without any additional weights. .
Peak knee and hip flexion angles, knee extensor moment, vertical ground reaction force, hip to knee extensor moment.
1️⃣~38% decrease in knee extensor moment in the surgical limb compared to the unaffected side.
2️⃣At 3 months post op, individuals relied heavily on shifting weight to the other limb while shifting the demand to the hip extensor of the surgical limb instead of the extensors.
3️⃣At 5 months, there was no shifting away from the surgical limb observed compared to 3 months. However, the compensation used was a shift using the hip extensors rather than knee extensor muscles.
Clinical Implication: This study shows the importance of specificity in terms of post acl rehab! Forget about the historic views of NOT doing open-chain knee extension exercises. Other high quality studies have refuted the idea that it’s dangerous or causes more laxity in the graft. Be specific! If you want to strengthen the quads - Isolate it! Think about how you practice, even if a squat looks amazing, do you truly know what’s going on? Are you certain the patient isn’t compensating through the hip extensors?
📚Compensatory Strategies That Reduce Knee Extensor Demand During a Bilateral Squat Change From 3 to 5 Months Following Anterior Cruciate Ligament Reconstruction - Sigward et al. (2018) 📚
🙌Just some food for thought! Let us know what you think!🙌”