Final answer:
The type of joint that allows free movement of the distal joint during exercise is a diarthrosis, which is a freely mobile synovial joint. Diarthrotic joints, essential for exercises, are classified based on the number of planes of movement they allow.
Step-by-step explanation:
The type of chain in exercise choice where the distal joint is free to move is known as a diarthrosis. This is a category of freely mobile joint found predominantly in the appendicular skeleton, which includes all synovial joints of the body. Diarthroses allow for a wide range of motion and are essential for various exercise movements.
They can be further classified into uniaxial, biaxial, and multiaxial joints, corresponding to the number of axes of motion they provide.
Movable joints, like those in your fingers, toes, hips, elbows, and knees, allow for the most movement. These joints are covered with a layer of cartilage to reduce friction and are often connected by ligaments, providing stability during movement. The ability to perform activities such as kicking a soccer ball or dancing is made possible by these freely movable synovial joints.