Fatigue

Question 1

theoretical models of brain regulation of endurance performance

Answer 1

1. Central Governor Model
2. Psychobiological Model
3. Serotonin hypothesis
4. Strength Control model

Question 2

Central Governor Model

Answer 2

• developed 1966 by Professor Noakes
• explains the phenomenon of fatigue

Question 3

Psychobiological Model

Answer 3

• motivational intensity theory
• reward > cost = persistence

Question 4

proposed biological mechanisms behind psychobiological model

Answer 4

ACC = anterior cingulate cortex

regulates:
- HR
- breathing
- autonomic response to exercise

ACC more active when performing mental tasks
- sustained attention
- conflict resolution
- response inhibition

Question 5

Serotonin hypothesis

Answer 5

(lack of evidence)
brain serotonergic activity during prolonged activity augments lethargy & loss of drive
- reduced motor unit recruitment
- neuromodulator role

Question 6

Strength Control model

Answer 6

self- control described to a muscle = more self-control exerted the more fatigued the area becomes

Question 7

areas affected from Strength Control model

Answer 7

• binge eating
• substance abuse
• unhealthy lifestyle habits
• antisocial behaviour