Question

check for understanding: joint physiology

what joint movement is essential for adding spin to the bowling ball?

• flexion
• rotation
• abduction
• extension

Explanation:

Analyze the biomechanics of bowling spin

Adding spin (or hook) to a bowling ball requires a twisting motion of the hand and fingers at the moment of release. This twisting motion occurs around the longitudinal axis of the forearm and wrist joints.

Identify the corresponding anatomical movement

• Flexion decreases the angle between bones (e.g., bending the wrist forward).
• Abduction moves a limb away from the midline of the body.
• Extension increases the angle between bones (e.g., straightening the wrist).
• Rotation is the turning of a bone or limb around its longitudinal axis. The twisting action of the wrist/forearm to apply spin is a form of rotation (specifically, pronation/supination or rotational release).

Answer:

• Flexion
• Rotation (Correct answer)
• Abduction
• Extension