Patellar tendon graft precautions require watching which type of exercise?

Patellar tendon graft precautions require watching which type of exercise?

• A. Resisted knee flexion
• B. Open-chain resisted exercises
• C. High-impact activities
• D. Resisted extension exercises

Answer: (D)

The key idea is protecting the graft from high tensile loads early in rehabilitation. With a patellar tendon graft for knee stabilization, contracting the quadriceps during knee extension pulls on the patellar tendon. This creates tension that runs through the graft, increasing strain on it when the knee is extended against resistance. Because the graft is still healing, that added load can risk elongation or failure, so resisted knee extension is the precaution to watch closely. In contrast, resisted knee flexion mainly uses the hamstrings, which pull the tibia backward and can actually reduce anterior forces on the graft, making it less risky early on. High-impact activities place overall joint stress but aren’t as specifically harmful to the graft as the direct extension against resistance. Open-chain resisted exercises can include extension motions, but the most direct and emphasized precaution is resisting knee extension itself.

The key idea is protecting the graft from high tensile loads early in rehabilitation. With a patellar tendon graft for knee stabilization, contracting the quadriceps during knee extension pulls on the patellar tendon. This creates tension that runs through the graft, increasing strain on it when the knee is extended against resistance. Because the graft is still healing, that added load can risk elongation or failure, so resisted knee extension is the precaution to watch closely.

In contrast, resisted knee flexion mainly uses the hamstrings, which pull the tibia backward and can actually reduce anterior forces on the graft, making it less risky early on. High-impact activities place overall joint stress but aren’t as specifically harmful to the graft as the direct extension against resistance. Open-chain resisted exercises can include extension motions, but the most direct and emphasized precaution is resisting knee extension itself.