AACVPR 2003

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AACVPR 2003

  1. 1. THE RELATIONSHIP BETWEEN YEAR OF PROGRAM COMPLETION AND FREQUENCY OF EXERCISE IN CARDIAC REHABILITATION PATIENTS Robert C. Lowe, MA, FAACVPR Wellness Research Center University of Central Florida
  2. 2. Introduction <ul><li>We previously reported that physical activity (PA) returned to near baseline by 6 and 12 mo. following an intensive cardiac risk intervention program (Lowe, et. al, 1998). </li></ul><ul><li>In addition, there was a shift in exercise patterns (EP) from high to moderate intensities (Lowe & Williams, 2000). </li></ul><ul><li>Both increased PA and EP have been implicated in the primary and secondary prevention of coronary artery disease (CAD). </li></ul>
  3. 3. Purpose <ul><li>The purpose of this study was to determine if the years since program completion (YEARS) influence frequency of “vigorous” aerobic exercise (FREQ). </li></ul>
  4. 4. Null Hypothesis <ul><li>YEARS since graduation will not influence the FREQ of “vigorous” physical activity. </li></ul>
  5. 5. Methods <ul><li>Annual cardiac rehab survey yielding 731 responses between the years of 1994 – 1998. </li></ul><ul><li>Variables of interest: </li></ul><ul><ul><ul><li>YEARS since program completion </li></ul></ul></ul><ul><ul><ul><li>FREQ of exercise per week </li></ul></ul></ul><ul><ul><ul><ul><li>“ In the past 3 months how often did you exercise aerobically for 20-30 minutes in your training heart rate zone per week?” </li></ul></ul></ul></ul>
  6. 6. Subject Characteristics <ul><li>Age, 62±11 yr. </li></ul><ul><li>Completed cardiac rehab program </li></ul><ul><ul><li>Exercise </li></ul></ul><ul><ul><li>Diet </li></ul></ul><ul><ul><li>Classes </li></ul></ul><ul><li>Average YEARS since completion of program, 4.3±2.3 yr. </li></ul><ul><li>Average FREQ of 2.5±1.1 exercise sessions per week </li></ul>
  7. 7. Statistics <ul><li>The relationship between FREQ and YEARS was explored by linear regression. </li></ul><ul><li>Data was analyzed by one-way ANOVA and Sheffé post-hoc tests. </li></ul><ul><li>The level of significance was set at p < 0.05. </li></ul>
  8. 8. Results <ul><li>The linear relationship between FREQ and YEARS was significant (F= 20.97, df=730, p < 0.05). </li></ul><ul><li>Prediction Equation </li></ul><ul><li>FREQ = 2.16 + 0.167[YEARS] </li></ul><ul><ul><li>Where YEARS = 1,2,3,4,5,6,7,8 </li></ul></ul>
  9. 9. Results
  10. 10. Results a different from YEARS 2-8; b different from YEARS 1-7 YEAR 1 2 3 4 5 6 7 8 FREQ 2.15 a 2.37 2.67 2.56 2.37 2.74 2.62 2.85 b 124 94 58 109 93 90 70 93 n
  11. 11. Results
  12. 12. Conclusions <ul><li>The results indicated that YEARS since program completion significantly predicted FREQ. </li></ul><ul><li>Further, FREQ was significantly greater 8 years post-cardiac rehab compared to 1 year post-cardiac rehab. </li></ul>
  13. 13. Caveats <ul><li>Data is by self-report. </li></ul><ul><li>No information regarding diagnosis at entry. </li></ul><ul><li>New medications, treatments, diagnoses. </li></ul><ul><li>Seasonal fluctuations in PA </li></ul><ul><li>Did not construct the survey. </li></ul><ul><li>Not a random sample. </li></ul>
  14. 14. Discussion <ul><li>The amount and intensity of physical activity of this group of post-cardiac rehab patients is likely to be less than has been shown to reverse CAD. </li></ul><ul><ul><li>5 sessions x 30 minutes = 150 minutes per week </li></ul></ul><ul><ul><li>On the average subjects performed 2.5 sessions x 30 minutes = 75 minutes per week </li></ul></ul>
  15. 15. Discussion <ul><ul><li>Lifestyle Heart Trial: 1990 </li></ul></ul><ul><ul><ul><li>Low fat diet: 10% Fat </li></ul></ul></ul><ul><ul><ul><li>Moderate exercise: > 30 minutes </li></ul></ul></ul><ul><ul><ul><li>Daily stress management </li></ul></ul></ul><ul><ul><ul><li>Results: </li></ul></ul></ul><ul><ul><ul><li>Treatment group showed 3.1% decreased coronary blockage over 5 years versus 11.8% increased blockage in the control group </li></ul></ul></ul><ul><ul><ul><li>Subjects who showed the most improvements exercised 5-7 hours per week </li></ul></ul></ul><ul><ul><ul><li>Ornish D, Brown SE, Lancet. 336: 129-133, 1990. </li></ul></ul></ul>
  16. 16. Discussion
  17. 17. Discussion
  18. 18. Discussion <ul><li>It is recommended that future research focus on interventions designed to increase PA. </li></ul>
  19. 19. “ An Ounce of Prevention is Worth a Pound of Cure.&quot; - Benjamin Franklin
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