Exercise intensity domains Flashcards

1
Q

Exercise intensity definiton

A

An individuals physiological response to external work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is normalising/regulating exercise intensity

A

An attempt to ensure individuals experience an equivalent physiological demand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When is it important to normalise? (2)

A

When measuring physiological / perceptual impact of an intervention

When designing effective training programmes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is it important to account for exercise intensity?

A

to avoid intra/inter individual variables obscuring real differences (eg personal differences in LT/Turn-point, Gas exchange threshold, ect)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is maximum steady state?

A

Highest running speed achieved when blood lactate, heart rate & O2 uptake are stable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is maximum steady state?

A

Highest running speed achieved when blood lactate, heart rate & O2 uptake are stable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Why is using % VO2 max questionable for normalisation purposes

A

occurrence of LT & maximal steady state (different physiological responses and can occur at a wide variety of % VO2 max’s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the oxygen uptake slow component look like for

heavy exercise?

A

Will eventually level off reaching a steady state

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How can response vary for subjects at eg 50% VO2 max

A

some below LT so no lactate produced and intaking steady amount of O2 others increasing O2 still and producing lactate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do responses differ for < LT, < MSS, > MSS intensity ran till exhaustion

A

> MMS has lowest ATP, PCr levels and most acidic pH

< LT had lowest muscle glycogen levels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the 4 exercise intensity domains

A

Moderate (< LT)

Heavy (< MSS)

Severe (> MSS achieving VO2 max)

Extreme (> MSS exhaustion before VO2 max)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the oxygen uptake slow component

A

A slow increase in VO2 that takes place after 2-3mins of exercise

only seen above LT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the oxygen uptake slow component look like for

severe exercise?

A

continues to rise until VO2max, no steady state obtained

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does the oxygen uptake slow component look like for extreme exercise?

A

Generally doesn’t last long enough for slow component to be determined

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the most likely explanation of the oxygen slow component?

A

Additional motor unit recruitment (type 2 fibres) through exercise (^ increased O2 cost)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How is cycling economy calculated?

Gain

A

Change in VO2 / change in work load = ml.min-1.W-1

difference in VO2 = rest to exercise

difference in work load = Exercise Watts - 20

17
Q

Moderate intensity exercise description / characteristics

A

all work rates < LT

Blood lactate not elevated

VO2 increases at 10ml.min-1.W-1

can be maintained > 4 hours

fatigue - glycogen depletion & muscle damage

18
Q

Moderate intensity graph

A

HR - steady within 3 mins

Bla - resting levels

19
Q

Heavy work rate characteristics / description

A

> LT but < MSS

after 2-3 mins VO2 slow component kicks in

VO2 increases 12 ml.min-1.W-1

even when completed till exhaustion VO2 remains sub maximal

30-120 mins

metabolite accumulation & substrate availability stop exercise

20
Q

Heavy intensity exercise characteristics / description

A

> LT but < MSS

after 2-3 mins VO2 slow component kicks in

12 ml.min-1.W-1

when completed to exhaustion steady state still obtained

30-120 min duration

fatigue - metabolite accumulation & substrate availability

21
Q

Heavy intensity graph

A

HR - steady state obtained after VO2 slow component

Bla - steady state above resting values

22
Q

Severe intensity exercise characteristics / description

A

Work rates > MSS where VO2 max is attained when continued to exhaustion

A steady state will never be reached

2-30 mins - pacing is crucial for running events

Fatigue - PCr depletion & metabolite accumulation

23
Q

2 reasons severe exercise domain is important

A

encompasses a wide range of work rates that allow VO2 max to be obtained

allows for exercise tolerance prediction (using PO, time graph)

24
Q

Severe exercise intensity graph

A

HR - continuous increase until HR / VO2 max

BLa - continuous rise until exhaustion

25
Q

Extreme exercise intensity characteristics / description

A

Work rates so high exhaustion comes before VO2 max

< 90s

Fatigue - PCr depletion & metabolite accumulation

Relatively little work done in this area

26
Q

Extreme exercise intensity graph

A

HR - continuous increase until exhaustion (not reaching VO2 max)

BLa - increased but actually low due to such short duration of exercise