The antagonist muscle in the flexion of the knee is the quadriceps muscle group. When the knee is being flexed, the quadriceps relax to allow the hamstrings to contract and bring about the flexion movement.
the quadriceps will contract and the hamstring will relax .the quariceps straightens the knee and the hamstring extends the hip and bends the knee to kcik the football the quadriceps will contract and the hamstring will relax .the quariceps straightens the knee and the hamstring extends the hip and bends the knee to kcik the football the quadriceps will contract and the hamstring will relax .the quariceps straightens the knee and the hamstring extends the hip and bends the knee to kcik the football
Quadricepts
while kicking a football, the Quadriceps muscle contracts concentrically to straighten the knee and the Hamstrings contract eccentrically to decelerate the motion of the lower limb.In concentric muscle contraction muscle length decreases along with contraction of the fibres while in eccentric muscle contraction the muscle length increases.Dr Santosh
The primary job of the quadriceps muscle is to extend the knee joint, which means straightening the lower leg. It also helps stabilize the knee during movement and contributes to activities like walking, running, and jumping.
extends leg; straightens knee joint
The primary function of the knee extension muscle is to straighten the leg by extending the knee joint.
Knee flexion is an example of a third-class lever, where the effort (force) is applied between the fulcrum (joint) and the resistance (weight of the lower leg). The quadriceps muscle exerts the effort to flex the knee joint, overcoming the resistance provided by the weight of the lower leg.
Only during wokouts that target the quads specifically like weighted squats. During regular running or walking, the hamstrings contract eccentricly to control the extension of the knee. Otherwise, the knee would would kick out in a snap with a powerful quad contraction. Esteban SPTA, South Texas College
The muscle primarily responsible for the last 10 degrees of knee extension is the popliteus muscle. It is a small muscle located at the back of the knee joint and helps to unlock the knee by internally rotating the tibia on the femur.
Because there is no muscle below the knee/hock to cushion the bones
Gastrocnemius muscle