Physiology of exercise

Question 1

Describe slow twitch (type 1) muscle

Answer 1

Oxidative, red, prolonged endurance activity

Question 2

Describe fast twitch type 2a muscle

Answer 2

red, endurance or rapid force, quickly fatigues

Question 3

Describe fast twitch type 2b muscle

Answer 3

White, rapid force production, quickly fatigues

Question 4

What is isometric contraction

Answer 4

Contraction against resistance when length of muscle remains the same

Question 5

What is isotonic contraction

What are concentric and eccentric?

Answer 5

Contraction against resistance when length of muscle changes

Concentric is when this is in direction of contraction.

Eccentric is the opposite (lengthening under load

Question 6

Describe the sources of energy for muscle cells during exercise as time progresses

Answer 6

First few secons is ATP which depletes. Then creatine phosphate, within first minute. Then aerobic metabolism, few minutes later overtaken by anaerobic metabolism

Question 7

What happens to the resp system during exercise

Answer 7

Makes up increased oxygen demand by increasing ventilation rate and tidal volume

(control via CNS, CO2, O2 and H+ levels pulmonary stretch receptors, peripheral joint receptors, body temp, psychological)

Question 8

Dooes arterial O2 and venous O2 change musch during exercise?

Answer 8

No

Question 9

What is VO2 max

Answer 9

When steady state oxygen consumption does not increase with work intensity

Question 10

What is oxygen deficit

Answer 10

If VO2 for exercise is higher than VO2 max, it is the difference between them

Question 11

What is EPOC

Answer 11

Excess post exercise oxygen consumption (paying the oxygen deficit)

Question 12

What happens in the fast component of the recovery phase

Answer 12

Resting levels of ATP and Creatine phosphate restored

Question 13

What happens in the slow component of the recovery phase

Answer 13

Lactiv acid converted to glucose in liver, calso converted to pyruvic acid

Question 14

Name the cardiac changes from exercise

Answer 14

Increased cardiac output (SV and HR)

Question 15

What is starlings law

Answer 15

The fuller the geart, the harder it will cotract increasing stroke volume

Question 16

How much exercise should adults get per week

Answer 16

at least 150 minutes of moderate intensity exercise

Question 17

What is sedentary behaviour

Answer 17

Any waking behaviour where sitting or lying is the dominant mode of posture

Question 18

What are the 5As of counselling

Answer 18

Assess
Advise
Agree
Assist 
Arrange