ATC Aquatic Kinesiology & Biomechanics 3

Question 1

Laminar flow in aquatic therapy is characterized by water moving:

Accepted Answer

In smooth, parallel layers without cross-currents or eddies

Answer

Laminar flow occurs when water moves in ordered, parallel layers with minimal disruption, typically at lower velocities, providing predictable and uniform resistance.

Question 2

The Magnus effect in aquatic therapy is most relevant when a patient performs:

Accepted Answer

Movements involving a spinning limb or equipment that generates a perpendicular lift force

Answer

The Magnus effect produces a force perpendicular to the direction of movement when a rotating object moves through fluid, relevant to spinning limbs or equipment during aquatic therapy.

Question 3

Wave drag during aquatic therapy is most significant when the patient is exercising:

Accepted Answer

At or near the water surface where movement generates surface waves

Answer

Wave drag occurs at the air-water interface where body movement creates surface waves; it is negligible during full submersion and maximal when the patient moves at the waterline.

Question 4

A patient with a higher percentage of body fat compared to lean muscle mass will demonstrate which aquatic biomechanical characteristic?

Accepted Answer

Lower specific gravity and greater ease of floating

Answer

Adipose tissue is less dense than muscle or bone, lowering the overall specific gravity of individuals with higher body fat percentages and increasing buoyancy.

Question 5

When calculating the torque created by a buoyant force on a submerged limb, the lever arm should be measured from:

Accepted Answer

The joint axis of rotation to the center of buoyancy of the limb segment

Answer

Buoyant torque is calculated using the perpendicular distance from the joint's axis of rotation to the center of buoyancy of the limb, following standard torque mechanics.

ATC - Aquatic Therapy Certification Practice Test

ATC - Aquatic Therapy Certification Practice Test

ATC Aquatic Kinesiology & Biomechanics 3