Mechanisms of Fatigue

What are the two different categories of fatigue?

• Accumulation

• Central

• Peripheral

• Cardiovascular

Peripheral fatigue may result from depletion of energy substrates or (a)   of specific metabolites in the muscle

Identify the exercise intensity domains

a

b

c

Severe

Heavy

Moderate

Which exercise intensity domain does fatigue occur before VO2max is reached

• moderate

• heavy

• severe

• extreme

Central fatigue is likely to influence exercise in which domain most?

• moderate

• heavy

• sever

• extreme

What metabolites may cause peripheral fatigue?

• PCr

• Pi

• ATP

• Hydrogen

Fatigue in the heavy domain can be caused by the depletion of what substrate?

• PCr

• Fat

• Glycogen

• ATP

When inorganic phosphate rises to a critical level e.g., 25mM exercise is terminated by the participant. True or False?

• True

• False

Hydrogen build up causes a decline in muscle force production. True or False?

• True

• False

Mechanisms of fatigue in the extreme domain are the same as the moderate domain?

• True

• False