PT Interventions 1

Question 1

What constitutes aerobic activity

Answer 1

Rhythmic activities that use large muscle groups and can be performed continuously and safely

Question 2

How is THR established?

Answer 2

Using upper and lower HR limits

Question 3

What are the two methods to calculating intensity for aerobic exercise?

Answer 3

1. Percent of max HR

2. HR reserve (Karvonen formula)

Question 4

Intensity for percent of max HR: lower THR

Answer 4

HRmax x 55%

Question 5

Intensity for percent of max HR: Upper THR

Answer 5

HRmax x 90%

Question 6

What is the Karvonen formula for lower THR?

Answer 6

Lower THR = [(HRmax - HRrest) x 40%] + HRrest

Question 7

What is the Karvonen formula for upper THR?

Answer 7

Upper THR = [(HRmax-HRrest) x 85%] + HRrest

Question 8

Duration recommendations: total daily activity

Answer 8

20-60 minutes per day

Question 9

Duration recommendations: low intensity activity

Answer 9

≥ 30 minutes

Question 10

Duration recommendations: higher intensity activity

Answer 10

≥ 20 minutes

Question 11

Aerobic exercise prescription recommendations: frequency

Answer 11

3-5 days per week

Question 12

how is SBP affected by acute cardio exercise?

Answer 12

Linear increase in SBP with increasing workload

8-12 mmHg per MET

Question 13

How is DBP affected by cardio exercise?

Answer 13

No change or moderate decrease in DBP

Question 14

Chronic adaptations to aerobic exercise: VO2max

Answer 14

Increased

Question 15

Chronic adaptations to aerobic exercise: HR

Answer 15

• No change or decrease at maximal exercise

- Decreased at submax exercise

Question 16

Chronic adaptations to aerobic exercise: SBP and DBP

Answer 16

• No change or slight increase at max exercise

- No change or slight decrease at submax exercise

Question 17

Chronic adaptations to aerobic exercise: blood lactate

Answer 17

• Increased at max exercise

- Decreased at submax exercise

Question 18

Chronic adaptations to aerobic exercise: oxidative capacity

Answer 18

Increase in:

• Mitochondrial number and size
• Capillary density
• Oxidative enzymes

Question 19

Chronic adaptations to aerobic exercise: plasma volume

Answer 19

Increased

Question 20

Chronic adaptations to aerobic exercise: skeletal muscle blood flow

Answer 20

• Increased at max exercise

- no change at submax

Question 21

Chronic adaptations to aerobic exercise: thermoregulation

Answer 21

• Improved body heat transfer due to larger plasma volume

- More responsive thermoregulatory mechanisms