Ace Group Fitness Exercise Science Fundamentals Questions and Answers — 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?
- Isometric
- Eccentric
- Concentric (Correct answer)
- Isokinetic
Correct answer: Concentric
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?
- A torso twist
- A jumping jack
- A forward lunge (Correct answer)
- A side shuffle
Correct answer: A forward lunge
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?
- Oxidative system
- Glycolytic system
- Phosphagen system (Correct answer)
- Aerobic system
Correct answer: Phosphagen system
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?
- Eccentric
- Isometric (Correct answer)
- Concentric
- Isotonic
Correct answer: Isometric
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?
- Agonist
- Synergist
- Antagonist (Correct answer)
- Fixator
Correct answer: Antagonist
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.
Question 6: A group fitness instructor is guiding participants through a moderate-intensity cycling class. The instructor wants to gauge the participants' exertion level without using heart rate monitors. They encourage the participants to see if they can speak a few sentences comfortably. This method is known as the:
- Rate of Perceived Exertion (RPE) Scale
- Talk Test (Correct answer)
- Metabolic Equivalent (MET) Level
- Borg Scale
Correct answer: Talk Test
The Talk Test is a subjective method used to measure exercise intensity based on a person's ability to hold a conversation. Being able to speak comfortably indicates a moderate intensity level.
Ace Group Fitness Exercise Science Fundamentals Questions and Answers
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?