Maintenance Pulmonary Rehabilitation Increases Walking Distance
Background: Whether maintenance pulmonary rehabilitation programs help to sustain the short-term benefits is unclear.
Study: Researchers in Spain studied patients with COPD over 3 years after they completed a standard 8-week pulmonary rehabilitation program. Subjects were randomized (divided by chance) into two groups: those who received maintenance therapy and those in a control group (no maintenance).
What was the maintenance program? Patients exercised at home three times a week doing: 15 minutes of chest physiotherapy; 30 minutes of lifting weights (which were bought by patients); and 30 minutes of riding a stationary cycle (provided by the hospitals). A physiotherapist called the patients every 15 days; during the alternate week, patients went to the hospital for a supervised training session.
What did the control group do? Patients in the control group were advised to exercise at home without any supervision. They were encouraged to walk or buy a stationary cycle for home use.
The study results were published in the March 1, 2017, issue of the American Journal of Respiratory and Critical Care Medicine (pages 622-629).
Results: For the total of 138 patients, average age was 64 years, and the amount of air exhaled in one second (FEV1) was 34% predicted. There were 68 patients in the treatment group, and 70 in the control group. More than 50% of those who started the study failed to complete the 3 years. Main reasons for stopping were a COPD flare-up (exacerbation), other medical problems (called co-morbidities), and death.
Those in the treatment group improved significantly more than the control group for: 1. distance walked in 6 minutes and 2. the BODE index [B = body mass index (weight and height); O = FEV1; D = breathlessness; E = 6-minute walking distance]. However, there were no differences in health-related quality of life between the two groups.
Conclusions: The authors concluded that the 3-year maintenance pulmonary rehabilitation program provided improvements in walking distance and the BODE index compared with usual care. These improvements lasted for 2-years; after that, there no longer was a beneficial effect.
My Comments: This study is notable because it has the longest follow-up period of any published randomized trial of maintenance pulmonary rehabilitation. The findings support the benefits of continued exercise following completion of a pulmonary rehabilitation program.
One limitation of the study is that it primarily involved men so that it cannot be assumed that women would experience the same benefits. However, women may be more compliant than men and are likely to live longer.
I recommend participation in pulmonary rehabilitation to all of my patients with COPD and strongly encourage maintenance after completing our 12-week program.