LECTURE 1

Question 1

DOMS: how long after exercise do they a) occur, b) peak, c) and subside?

Answer 1

a) 12-24hrs b) 24-72hrs c) 5-7 days

Question 2

what four ways do DOMS interfere with motor performance?

Answer 2

a) reduced muscle contraction power
b) reduced ROM
c) swelling & oedema
d) higher injury risk

Question 3

list some treatments for DOMS

Answer 3

active recovery
adequate nutrition
sleep
cryotherapy
compression garments
massage
stretching

Question 4

what is the ‘repeat bout’ effect in relation to DOMS?

Answer 4

DOMS is caused by bouts of unfamiliar exercise. Repeating the same bout of exercise after recovery reduces DOMS.

Question 5

List the general differences between central & peripheral fatigue

Answer 5

central fatigue
- CNS fatigue
- reduction in motor units activated
- reduction in motor unit firing
- influenced by CNS arousal
- interplay between motivation and physical capability

peripheral fatigue
- localised
- neural factors: reduced ability of sarcolemma & t-tubules to conduct AP due to fatigue in sodium potassium pump
- mechanical factors: build up of H+ & Pi reduces force per cross bridge cycling, force generated at a given Ca2+ concentration & inhibits Ca2+ release from SR
- energetics: inability to to regenerate ATP due to accumulation of Pi