Unlike compound movements like squats or lunges, the leg extension machine specifically targets the knee joint, making it a great tool for strengthening the quads without excessive hip involvement.

“During a lunge, the back leg goes into a hip extension and stretches the quads and hip flexors,” Dr. Fata-Chan says. He says it’s good to do this dynamic stretch before working out to warm ...

Objective: To determine if the combined isometric contractions of knee extension/hip adduction and knee extension/hip abduction will elicit a different quadriceps and gluteus medius electromyographic ...

Grab a kettlebell and keeping your torso upright and feet close together, squat down until the crease of your hip passes ... isolating the quads in the absence of a leg extension machine.