aerobic exercise prescription

Question 1

indication for aerobic exercise

Answer 1

• reduced cardio respiratory endurance

- Primary and Secondary prevention of cardiovascular disease

Question 2

precautions/contraindication for aerobic exercise

Answer 2

• Appropriate screening or health appraisal should be perfomed prior to beginning exercise training to identify known disease, risk factors for coronary artery disease and other factors that wil optimize adherence minimize risk and maximize benefits
• avoid valsalva maneuver

Question 3

overload principle

Answer 3

-to improve its function, a tissue or organ must be exposed to a stress or load greater than that which is normally encounters

Question 4

principle of specificity

Answer 4

• states that teh long-term adaptation to the metabolic and physiologic systems derived from exercise are specific to the exercises perfomed and teh muscles involved

Question 5

target heart rate

Answer 5

• is established from lower and upper heart rate limits calculated using differnet percentage training intensities depending on the individual’s age, fitness level, health status, and goals

Question 6

calculate lower THR

• via percent of max HR
• via Karvonen formula or HRR

Answer 6

• Lower THR = HRmax x55%

- lower THR= [(HRmax- HRrest) x40%] +HR rest

Question 7

calculate Upper THR

• via percent of max HR
• via Karvonen formula or HRR

Answer 7

• Upper THR= HR max x 90%

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

Question 8

Duration of aerobic exercise

Answer 8

• duration is dependent on the intensity of the activity
• 20-60 minutes of cont or intermittent activity (minimum of 10min bouts accumulated throughout the day)
• lower intensity activity should be performed over a longer period of time
• higher intensity activity should be performed for 20 min or longer
• mod intensity activity of longer duration is recommended for adults not training for athletic competition due to the potential hazards and adherence associated with high-intensity activity

Question 9

normal cariorespiratory Response to Acute Aerobic exercise

Answer 9

• increased oxygen consumption due to incr cardiac output,incr blood flow, and oxygen utilization in the exercising skeletal muscles
• linear incr in SBP with increasing workload
  no change or moderate decrease in DBP
  -incr RR and Tidal Volume

Question 10

Chronic adaptations to aerobic Exercise

Answer 10

• VO2 max: incr at maximal exercise
  -HR: no change or decrease at maximal exercise; decr at submaximal exercise
  -Arteriovenous oxygen differnece: incr at maximal exercise; no change at submaximal exercise
• SBP and DBP: no change or slight incr at max exercise; no change or slight decr at submaximal exercise
  -blood lactate: incr at max exercise; decreased at submaximal exercise
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