Module 7 - Passive Energy

Question 1

Maximizing runners’ passive energy contribution can improve their _________.

Answer 1

Running economy.

Question 2

The goal of a runner is to _______ running form (mechanics) to convert as much of this ________ as possible into forces that assist in _________ movement.

Answer 2

Optimize. Stored energy. Forward.

Question 3

Potential elastic energy is converted to ________.

Answer 3

Kinetic energy.

Question 4

What type of contraction does the stretch-shorten cycle represent?

Answer 4

Eccentric contraction followed by a rapid concentric contraction

Question 5

What variables affect the degree of elastic return?

Answer 5

Length of the stretch, Speed of the stretch (loading), Stiffness of the muscle and tendon, Time between the stretch and the contraction

Question 6

What is the elastic region?

Answer 6

It is the region where the material can be deformed and when released will return to its original configuration.

Question 7

What is plastic region?

Answer 7

In the plastic region, the object or material does not come back to its original size or shape when stress vanishes but acquires a permanent deformation.

Question 8

Potential energy and _____________ are reduced if the heel does _____________ during the drive phase.

Answer 8

Running economy. Not touch the ground

Question 9

What is the primary functions of the foot regarding running?

Answer 9

The primary functions of the foot regarding running are shock absorption and propulsion.

Question 10

Passive movement is the result of what?

Answer 10

Passive movement is representative of body movement that is not the result of active muscle contractions.