AK Biomechanics & Body Movement Analysis 3

Question 1

In applied kinesiology, what does a 'bilateral weight shift test' primarily assess?

Accepted Answer

The symmetry of weight-bearing through the lower extremities and pelvis

Answer

The bilateral weight shift test reveals asymmetric loading patterns that may indicate pelvic imbalance, leg-length discrepancy, or compensatory postural adaptations.

Question 2

Which connective tissue structure provides the primary passive restraint against anterior tibial translation at the knee?

Accepted Answer

Anterior cruciate ligament

Answer

The anterior cruciate ligament (ACL) is the main passive restraint preventing the tibia from sliding anteriorly relative to the femur.

Question 3

What is the primary determinant of whether a muscle acts as a prime mover or stabilizer in a given movement?

Accepted Answer

The direction of the line of pull relative to the joint axis

Answer

The line of pull relative to the joint's axis of motion determines whether a muscle produces torque (prime mover) or compressive joint force (stabilizer).

Question 4

During normal walking, at which phase of the gait cycle does peak hip extension occur?

Accepted Answer

Terminal stance

Answer

Peak hip extension occurs during terminal stance as the body pivots over the stance foot and the trailing limb reaches maximum extension before toe-off.

Question 5

The screw-home mechanism of the knee involves which motion as the joint reaches full extension?

Accepted Answer

Tibial external rotation

Answer

As the knee reaches full extension, the tibia externally rotates on the femur (or the femur internally rotates on a fixed tibia), locking the joint into the close-packed position.

(AK) Certified Applied Kinesiologist Practice Test

(AK) Certified Applied Kinesiologist Practice Test

AK Biomechanics & Body Movement Analysis 3