NASM Ch 7 Warm up #1

Which type of muscle contraction is characterized by the muscle lengthening while under tension, and is often used to decelerate and control movement?

• Concentric

• Eccentric

• Isometric

• Isokinetic

During a plank exercise, which type of muscle contraction is primarily occurring in the core muscles?

• Concentric

• Eccentric

• Isometric

• Isokinetic

In a bicep curl, which muscle acts as the agonist?

• Triceps

• Biceps

• Deltoids

• Quadriceps

What is the primary role of a synergist muscle during a movement?

• Prime mover

• Oppose the prime mover

• Assist the prime mover

• Stabilize the joint

Which type of muscle contraction requires the greatest amount of energy due to muscle shortening?

• Concentric

• Eccentric

• Isometric

• Isokinetic

When performing a controlled descent in a squat, which type of muscle contraction is primarily occurring in the quadriceps?

• Concentric

• Eccentric

• Isometric

• Isokinetic

Which type of muscle contraction is characterized by the muscle shortening at a constant speed over the full range of motion, often controlled by a machine?

• Concentric

• Eccentric

• Isometric

• Isokinetic

What happens to the muscle force when the muscle is at its optimal sarcomere length?

• Muscle force is minimized

• Muscle force is maximized

• Muscle force is zero

• Muscle force is unpredictable

In the context of muscle contractions, what does the term "length-tension relationship" refer to?

• The speed at which a muscle contracts

• The tension a muscle can produce at its resting length

• The energy required for muscle contraction

• The duration a muscle can sustain contraction

Which type of muscle contraction is most efficient in terms of energy usage due to the involvement of fewer motor units?

• Concentric

• Eccentric

• Isometric

• Isokinetic