Seated Leg Extension
Explore seated leg extension in 3D. Focus: Quadriceps, Abdominals.
Leg extension machine
Setup
Align the knees with the machine pivot and place the roller above the ankles; hold the side handles and keep hips on the seat.
Exercise guide
Controlled return
Bend the knees slowly and let the shin roller return without dropping the weight stack.
Settle and stabilize
Pause briefly and keep the body stable.
Working phase
Extend the knees to lift the roller, keeping hips on the seat; do not snap the knees straight.
Controlled hold
Stay within a comfortable range; avoid bouncing or forcefully locking joints.
Common mistakes
Avoid momentum, shrugging, arching the lower back or losing control on the return.
Colors show roles, not measured activation; white areas may also stabilize.