Free CSCS: Biomechanics of Resistance Questions and Answers — Questions and Answers
Question 1: Which of the following doesn't represent a particular kind of muscle action?
- Eccentric
- Concentric
- Plyometric (Correct answer)
- Isometric
Correct answer: Plyometric
Explanation: <br> The term "plyometric" refers to a particular workout style that uses the stretch-shortening cycle to enable the rapid generation of peak force. Which of the following doesn't represent a specific kind of muscle action?
Question 2: A muscle that "agonists"...
- …indirectly assists in a movement
- …slows down or stops a given movement
- …is primarily responsible for a given movement (Correct answer)
Correct answer: …is primarily responsible for a given movement
Explanation: <br> ...is mainly in charge of a specific movement. The "agonist" is the muscle most directly responsible for moving. The "antagonist" muscle is the one that can inhibit that movement. A "synergist" is a muscle that indirectly aids in movement.
Question 3: Meaning of Distal...
- Further from the head
- Closer to the trunk
- Closer to head
- Further from the trunk (Correct answer)
Correct answer: Further from the trunk
Explanation: <br> More distant from the trunk. Distal refers to how far away from the trunk a physical component is (relative to another body part). For instance, the elbow is "proximal" when compared to the wrist yet distal when compared to the upper arm (closer to the trunk).
Question 4: The longer the moment arm of muscle force when working with levers...
- …the shorter the moment arm of the resistive force
- …the less force needed to overcome the resistive force (Correct answer)
- …the longer the moment arm of the resistive force
- …the more force needed to overcome the resistive force
Correct answer: …the less force needed to overcome the resistive force
Explanation: <br> The lever gets more effective the longer the moment arm of the muscular force is. Fewer muscles are required when efficiency is higher.
Question 5: Which position on a barbell curl by an athlete has the most extended moment arm of resistive force?
- At the uppermost position of the exercise
- No change in moment arm length throughout the range of motion
- At the bottommost position of the exercise
- At the midpoint of the exercise (Correct answer)
Correct answer: At the midpoint of the exercise
Explanation: <br> The resistive force (the barbell) is at its most significant horizontal distance from the fulcrum at the halfway point of the activity (elbow). At this point in the range of motion, the moment arm of the resistive force is the longest.
Question 6: True or False: The appendicular skeleton includes the skull.
- TRUE
- FALSE (Correct answer)
Correct answer: FALSE
Explanation: <br> The sternum, ribs, and vertebral column comprise the "axial" skeleton. The "appendicular" structure includes all the remaining bones in the body.
Question 7: True or false: The mechanical advantage of a second-class lever over a muscle force is always more significant.
- TRUE (Correct answer)
- FALSE
Correct answer: TRUE
Explanation: <br> True. Muscle force has a more significant mechanical advantage since it has a more extended moment arm than resistive force in a second-class lever.
Free CSCS: Biomechanics of Resistance Questions and Answers
Which of the following doesn't represent a particular kind of muscle action?