MOD 11: dynamic exercise concentric and eccentric

Question 1

What are the two types of muscle contractions that are foundational to dynamic resistance exercise training?

Answer 1

• Concentric contractions
• Eccentric contractions

These contractions are essential for understanding how muscles behave during movement.

Question 2

In concentric contractions, what happens to the muscle?

Answer 2

The muscle shortens to produce movement

This type of contraction allows for acceleration of a limb or body segment.

Question 3

In eccentric contractions, what occurs with the muscle?

Answer 3

The muscle lengthens while still active

This type of contraction controls movement and absorbs force.

Question 4

True or false: Every functional task requires both concentric and eccentric contractions working together.

Answer 4

TRUE

Examples include walking, climbing stairs, and landing from a jump.

Question 5

What is the primary function of concentric exercise?

Answer 5

To produce movement and accelerate a body segment

It allows initiation of movements like standing up or stepping onto a stair.

Question 6

What is the primary function of eccentric exercise?

Answer 6

To control and decelerate motion

It is critical for shock absorption and joint protection.

Question 7

List three benefits of eccentric contractions in rehabilitation.

Answer 7

• Higher force production with lower energy cost
• Critical for tendon remodeling
• Improves motor control

Eccentric loading is often used for conditions like tendinopathies.

Question 8

What is a key caveat of eccentric training?

Answer 8

It can produce more delayed onset muscle soreness

This is particularly true if progressed too quickly.

Question 9

In terms of energy expenditure, how do concentric contractions compare to eccentric contractions?

Answer 9

Concentric contractions require more metabolic energy for a given workload

Patients often find pushing or lifting more effortful than controlling the lowering phase.

Question 10

What should rehabilitation programs focus on regarding concentric and eccentric training?

Answer 10

Train both contraction types

This ensures patients regain movement and control.

Question 11

What is the clinical takeaway regarding exercise selection?

Answer 11

It should match functional goals and required movement velocities

Higher-intensity concentric loading increases cardiovascular demand.

Question 12

Fill in the blank: Eccentric contractions allow higher loads with less _______.

Answer 12

metabolic cost

This is crucial for managing tissue loading without excessive fatigue.

Question 13

What are the two primary types of dynamic contractions?

Answer 13

• Concentric contractions
• Eccentric contractions

Both involve active muscle engagement but differ in relation to external load.