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CV Exercise Prescription

CV Exercise Prescription. Reasonable and Expected Values for VO 2. Textbook, Fig. 8-3, P. 117. The Anaerobic Threshold Concept. Terminology. VO 2 R VO 2 reserve capacity VO 2 R = (VO 2 max – VO 2 Resting) HRR Heart Rate Reserve HRR = (HRmax – HR rest). Mode of Activity.

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CV Exercise Prescription

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  1. CV Exercise Prescription

  2. Reasonable and Expected Values for VO2

  3. Textbook, Fig. 8-3, P. 117

  4. The Anaerobic Threshold Concept

  5. Terminology • VO2R • VO2 reserve capacity • VO2R = (VO2max – VO2 Resting) • HRR • Heart Rate Reserve • HRR = (HRmax – HR rest)

  6. Mode of Activity • Use of large muscle groups • Legs or legs + arms • When small muscles are used the HR response is exaggerated • Different modes are equivalent if HR is raised to same level for same period of time or total calories are the same

  7. Factors Determining Best Mode • Enjoyable • Accessible • Orthopedic limitations • Body Mass • Motor Skill • Must do activities that are at least tolerable

  8. Fitness and Health

  9. ACSM/AHA Current PA Recommendations • Moderate intensity aerobic exercise (3-6 Mets) for minimum of 30 min, 5 days per week • OR, vigorous intensity aerobic exercise (>6 Mets) for minimum of 20 min, 3 days per week. • Any combination that accumulates 450-750 Met.min • Strength training

  10. What Counts? • Intermitten bouts of at least 10 minutes • Occupational tasks that meet the intensity criteria

  11. Expected Improvement in Fitness • VO2max improves 10-30% • Lactate threshold improves 10-20%

  12. Maintenance • Health Benefits • 450-750 Met.min per week forever • Consistency is the key • Fitness Benefits • Maintaining intensity will maintain VO2max • IF training is stopped • Loss of up to 50% after 1-3 months • Loss of 100% after 3-8 months

  13. CV Function and the Elderly (65 yr+) • VO2max decreases 5-15% per decade after age 25-30 • Primary cause is decrease in max CO • Secondary cause is decrease metabolic capacity of muscle • Submaximal responses • Same at equivalent relative intensities • HR is higher at same absolute power

  14. Trainability of the Elderly • 10-30% increase in VO2max (M & F) • Increase in max SV (males) • Increase in metabolic capacity of muscle (males and females)

  15. Precautions for the Elderly • More susceptible to traumatic exercise • More likely to have underlying disease • Must know health history and risk profile

  16. Current PA Recommendations for the Elderly • Moderate intensity aerobic activity for minimum of 30 min, 5 days per week, OR • Vigorous intensity aerobic activity for minimum of 20 min, 3 days per week. • Muscle-strengthening • Flexibility • Balance

  17. Moderate and Vigorous Intensity Definitions • 10-point scale where sitting is 0 and all-out effort is 10 • Moderate intensity is 5-6 and produces noticeable increases n heart rate and breathing. • Vigorous intensity is 7-8 and produces large increases in heart rate and breathing.

  18. Exercise and Pregnancy • Females in good health can and should exercise moderately during pregnancy • Minimize thermal stress • Maintain hydration • Exercise to a level of moderate exertion • Maintain sufficient caloric intake • Do not exercise in supine position after first trimester • Do not perform prolonged Valsalvas • Avoid high impact and high risk activities

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