Cardiac Rehab

Question 1

What is the lactate threshold?

-what is it in people with cardiac disease?

Answer 1

The percentage of VO2 max at which lactate production exceeds lactate metabolism via Krebs cycle, so lactate builds up. >40% of VO2 max in normal individuals.

**people with cardiac disease have a much lower lactate threshold.

Question 2

Define VO2 max

Answer 2

VO2 max is the maximal ability of the body to take in, transport and use oxygen

Question 3

What does training do to the body in normal individuals

Answer 3

• decrease resting HR (enhances PNS)
• Increase LV mass and radius
• Increase VO2 max

Question 4

How does blood pressure change during exercise?

Answer 4

systolic BP increases (sympathetic constriction of core vessels)
diastolic BP decreases (sympthetic dilation of peripheral vessels)

Question 5

How does exercise training reduce angina?

Answer 5

• it reduces resting HR and systolic BP, this delays angina which is a result of HR and SBP

Question 6

What is a MET?

Answer 6

metabolic equivalents are a ratio of the energy used doing an activity versus the energy used at rest. Higher METS=higher intensity

Question 7

What risk factors does exercise modify?

Answer 7

• diabetes
• HDL levels
• HTN
• Stress
• Obesity

Question 8

How to explain what the intensity of exercise should be in an exercise prescription?

Answer 8

Rate of perceived exertion:
0-2: have enough breath to sing
3-5: have enough breath to talk
6-10: breathing heavily

OR

Heart Rate 60-70% of (220-age) in non-medicated individuals. Have to do an exercise test in medicated individuals

Question 9

Standard exercise prescription

Answer 9

Frequency: 3-5 x wk
Intensity: 3-4 RPE
Time: 30-45 minutes, not including warm up
Type: aerobic, strengthening, flexibility

F.I.T.T