Question

Motion Analysis: leg curl Lifting Phase (AB) In that role, contraction type? Role A (agonist/antagonist) Semitendinosus Rectus Femoris B Popliteus Sartorius Lowering Phase (BA) Semimembranosus Sracilis Vastus intermedius

Answer 1

The leg curls mainly act on the knee joint. They aim to strengthen the knee flexors. Knee flexors consists of hamstring group of muscles : semitendinosus, semimembranosus and biceps femoris.

Leg curls are performed while lying prone on exercise table and flexing the knee joint against resistance or load. The knee flexors acts as agonists while knee extensors act as antagonist.

The upward phase is marked with knee flexion with knee flexors i.e. hamstrings acting as prime movers.

The lowering phase is marked by knee extension with knee extensors i.e. quadriceps femoris acting as prime movers.

Motion Analysis: leg curl Lifting Phase (AB) Role In that role, contraction type? A (agonist/antagonist) Semitendinosus Agonist Agonist Concentric Concentric Rectus Femoris B Popliteus Agonist Concentric Concentric Sartorius Agonist Lowering Phase (B A) Semimembranosus Antagonist Concentric Concentric Sracilis Antagonist Agonist Vastus Eccentric intermedius