Ace Group Fitness Exercise Science Fundamentals Questions and Answers

Question 1

A group fitness instructor is leading a strength training class. During the upward phase of a bicep curl, the biceps brachii muscle is shortening while contracting. Which type of muscle action is being demonstrated?

Accepted Answer

Concentric

Answer

A concentric contraction occurs when the muscle shortens under tension. During the upward phase of a bicep curl, the biceps brachii shortens to lift the weight, which is a classic example of a concentric muscle action.

Question 2

Which of the following movements occurs primarily in the sagittal plane?

Accepted Answer

A forward lunge

Answer

The sagittal plane divides the body into left and right halves. Movements in this plane are forward and backward motions. A forward lunge involves moving forward, thus it occurs primarily in the sagittal plane.

Question 3

During a high-intensity interval training (HIIT) class, participants perform 30 seconds of all-out sprinting. Which energy system is predominantly used to fuel this short, explosive activity?

Accepted Answer

Phosphagen system

Answer

The phosphagen system provides immediate energy for very high-intensity activities lasting up to about 10-30 seconds. Sprinting for 30 seconds relies heavily on this system for rapid ATP production.

Question 4

A participant in a boot camp class is performing a plank. Their abdominal and core muscles are engaged to hold a stable position without any visible movement of the joints. What type of muscle contraction is primarily being utilized?

Accepted Answer

Isometric

Answer

An isometric contraction occurs when a muscle generates force without changing its length. In a plank, the core muscles are contracting to stabilize the spine, but there is no movement, which is characteristic of an isometric hold.

Question 5

During a cool-down stretch, a participant is performing a standing quadriceps stretch. As the quadriceps are being stretched, what is the role of the opposing muscle group, the hamstrings?

Accepted Answer

Antagonist

Answer

In any movement, the muscle that opposes the action of the prime mover (agonist) is the antagonist. While the quadriceps (agonist) are contracting to extend the knee (or being stretched in this case), the hamstrings act as the antagonist, relaxing to allow the movement.

Ace Group Fitness Test Practice Test

Ace Group Fitness Test Practice Test

Ace Group Fitness Exercise Science Fundamentals Questions and Answers