L14 Muscle Cell Changes

Question 1

How is force generation in most activities impaired?

Answer 1

the usual low frequency motor unit firing rates no longer produce the force required for a given task. therefore firing rate has to be increased to generate the required force. Often this requires a conscious effort. Therefore more effort is required for a simple task

Question 2

Low frequency fatigue is very common after:

Answer 2

Unaccustomed exercise
Eccentric exercise.
It can be very long lasting and DOMs usually follows

Question 3

Fatigue during maximal intensity exercise means…

Answer 3

Loss of force

Slowing of relaxation

Question 4

What is the evidence that PCr is not a fatigue cause?

Answer 4

as force and PCr levels decline together in exercise, in recovery PCr recovers before force which wouldn’t happen if they weren’t related

Question 5

Force and the fatigue substance must decline together and rise together in recovery. Which substance is closest related to fatigue levels?

Answer 5

IMP levels

Question 6

Fatigue is a multifactoral process, no single factor has yet been identified, or is ever likely to be, that can explain fatigue under all circumstances

Answer 6

Cool stuff