Practice Quiz

Group Fitness Instructor

Category - Exercise Selection

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Your popular balance class is held in the swimming pool because of the inherent “protective” qualities of exercise in water. Which of the following effect is LEAST likely to be due to the property of buoyancy?
  1. A shift in blood from legs towards the thorax
  2. A decrease in weight through the legs
  3. Resistance during forced immersion of a foam object (such as a dumb-bell)
  4. A decrease in compression forces through the spine
Explanation
Answer: A - Immersion in water does result in a shift of blood and other fluids from the legs up to the chest; however, this response is due to the property of hydrostatic pressure, not buoyancy. Buoyancy is also chiefly responsible for decreasing the weight or compression through the spine and lower extremities and for increasing the difficulty for participants to immerse anything buoyant, for instance a foam barbell.
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