CSC Biomechanics and Movement Analysis

Question 1

What does 'center of mass' (COM) refer to in biomechanical analysis of an athlete?

Accepted Answer

The point where the body's total mass can be considered to be concentrated for movement analysis

Answer

The heaviest body segment

Answer

The joint around which all rotation occurs

Answer

The muscle with the highest force output

Question 2

In the squat, which joint angle change most increases compressive force on the patellofemoral joint?

Accepted Answer

Increasing knee flexion beyond 90 degrees

Answer

Hip extension beyond neutral

Answer

Ankle dorsiflexion

Answer

Shoulder elevation

Question 3

What is the principle of 'force-velocity relationship' in muscle mechanics?

Accepted Answer

As contraction velocity increases, the maximum force a muscle can produce decreases

Answer

Muscles produce the most force at the highest velocities

Answer

Force and velocity are unrelated

Answer

Eccentric contractions produce the least force

Question 4

What is 'valgus collapse' of the knee and why is it biomechanically problematic during landing?

Accepted Answer

Inward collapse of the knee medially, increasing ACL strain and patellofemoral stress

Answer

Outward bowing of the knee, which is safe during sport

Answer

Hyperextension of the knee during landing

Answer

Lateral rotation of the tibia under load

Question 5

What does 'torque' mean in the context of biomechanical joint analysis?

Accepted Answer

The rotational force produced around a joint axis (force × moment arm)

Answer

The linear speed of a limb

Answer

The total body mass of the athlete

Answer

The stiffness of a tendon

Question 6

In analyzing a deadlift, an excessively long moment arm at the lumbar spine most likely results from:

Accepted Answer

A horizontal back angle placing the bar far from the spine's axis of rotation

Answer

Standing too close to the barbell with a vertical torso

Answer

Gripping the bar too wide

Answer

Wearing a weightlifting belt