10/01/2022
Quadriceps:
Your quadriceps femoris are among the largest and strongest muscles in your body. Each quad is a group of four muscles located at the front of your thigh. These four muscles work together to help you stand, walk, run, and move around with ease. They also keep your kneecap stable.
Harmstring:
The hamstring muscles are responsible for your hip and knee movements in walking, squatting, bending your knees, and tilting your pelvis.
The term "hamstring" also refers to the group of 3 muscles that run along the back of your thigh, from your hip to just below your knee.
Antagonist & Agonist:
Muscles can only pull; they cannot push. This is why they usually work a joint in pairs. One muscle of the pair contracts to move the body part, the other muscle in the pair then contracts to return the body part back to the original position. Muscles that work like this are called antagonistic pairs.
In an antagonistic muscle pair as one muscle contracts the other muscle relaxes or lengthens. The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist.
