Lecture 14 Flashcards
1
Q
Steady state of metabolic demands:
A
- continuous/sustained aerobic activity
- rest
2
Q
Non-steady state of metabolic demands:
A
- non continuous/interval activity
- combination of higher and lower intensity demans
3
Q
Steady state activities examples:
A
- long distance running
- cross-country skiing
- firefighting
4
Q
Limits to performance for steady state activities:
A
- oxygen delivery to working muscles
- oxygen extraction by working muscles
- oxygen utilization by working muscles
- substrate availability
5
Q
Fick equation:
A
VO2 = cardiac output x a-vO2 difference
6
Q
Cardiac output =
A
HR x SV
7
Q
Cardiac output:
A
- central factors
- stroke volume –> left ventricular chamber size
8
Q
a-vO2 difference:
A
- peripheral factors
- ability for muscles to extract oxygen
- ability for muscles to utilize oxygen
9
Q
Aerobic power test:
A
VO2 max
10
Q
VO2 max:
A
highest rate of oxygen consumption during intense exercise
11
Q
VO2 max is a incremental test, meaning:
A
- exercise is performed at gradually increasing intensity
- VO2 is measured at each intensity
- steady-state is reached at each intensity
- intensity is increased until volitional or non-volitional failure
12
Q
VO2 max field tests:
A
- Bruce treadmill test
- Cooper 12 minute run
- beep test
13
Q
Anaerobic threshold:
A
work rate when metabolic demands shift from predominantly aerobic to predominantly anaerobic
14
Q
Anaerobic threshold for untrained/physically active:
A
50-55% VO2 max
15
Q
Anaerobic threshold for hockey/soccer:
A
70-80% VO2 max
