Effectiveness of a Long-term Home-Based Exercise Training Program in Patients With COPD After Pulmonary Rehabilitation: A Multicenter Randomized Controlled Trial.

BACKGROUND: Most patients with COPD do not maintain exercise training after pulmonary rehabilitation (PR). RESEARCH QUESTION: Does a 12-month home-based, minimal-equipment strength training program after PR have an effect on dyspnea, exercise capacity, and patient-reported outcomes in patients with COPD? STUDY DESIGN AND METHODS: In a parallel-arm multicenter study across four Swiss PR clinics, patients with COPD were allocated randomly (1:1 ratio) into an intervention group (IG; home-based strength training program) or control group (CG; usual care). The primary outcome was change in Chronic Respiratory Questionnaire (CRQ) dyspnea scale score from baseline to 12 months. Secondary outcomes were change in exercise capacity (1-min sit-to-stand-test [1MSTST], 6-min walk test [6MWT]), health-related quality of life, exacerbations, and symptoms. We assessed the IG's experience by interviews at study end. Main analyses were based on the intention-to-treat approach, and adjusted linear regression models were used. RESULTS: One hundred twenty-three patients with COPD (IG, n = 61; CG, n = 62) were randomized, 61 of whom were women and whose mean ± SD age was 66.8 ± 8.1 years and mean ± SD FEV1 was 39.3 ± 15.3% predicted. One hundred four participants completed 12 months of follow-up (IG, n= 53; CG, n= 51). Of the 53 IG participants, 37 participants (70%) conducted the training until study end. We found no difference in change in CRQ dyspnea scale score over 12 months (adjusted mean difference, 0.28; 95% CI, -0.23 to 0.80; P = .27). We found moderate evidence for a difference in 1MSTST repetitions favoring the IG (adjusted mean difference, 2.6; 95% CI, 0.22-5.03; P = .033), but no evidence for an effect in other outcomes. Seventy-nine percent of the IG reported positive effects that they attributed to the training. INTERPRETATION: The home exercise program had no effect on dyspnea, but improved 1MSTST performance and patient-perceived fitness. The supported program was well accepted by patients with COPD and may facilitate continued exercise training at home. TRIAL REGISTRY: ClinicalTrials.gov; No.: NCT03461887; URL: www. CLINICALTRIALS: gov.

Evaluation of the Implementation of a Home-Based Exercise Training Program for People With COPD: A Mixed-Methods Study.

Introduction: Recently, we developed a home-based, minimal-equipment exercise training program HOMEX for people with chronic obstructive pulmonary disease (COPD) and tested its effectiveness over 1 year in a randomized controlled trial. The aims of the current study were to evaluate the implementation of HOMEX from the perspectives of all involved persons and to optimize the program to ensure its long-term sustainability. Methods: In this mixed-methods study, we used qualitative and quantitative approaches to evaluate the implementation of the intervention on the level of patients with COPD and coaches who provided the intervention and relevant stakeholders. To assess the implementation outcomes dose, reach, fidelity, and adherence, we summarized information recorded in the notes of the coaches and the diaries of patients, complemented with results from qualitative assessments. To assess acceptability and appropriateness, we conducted surveys with patients and coaches, and semistructured interviews with selected patients, coaches, and stakeholders. Results: The coaches delivered the three home visits with one exception according to the protocol (fidelity). Of the 53 intervention group participants, 37 (70%) conducted HOMEX training until the end of the study and 43 (79%) trained for at least 10 months. The exercise behaviors of the participants could be separated into the phases "Starting the training and stabilizing into regular training routine" and "Managing training disruptions" (adherence). Overall, patients, coaches, and stakeholders conveyed a very high "acceptability" of HOMEX, noting the home-based aspect as a particular strength and interaction with other patients as future need. All involved groups perceived the strength-training exercises as appropriate, efficient for people with COPD, and relevant to maintain improvements after pulmonary rehabilitation. The most important facilitators of the patients for long-term motivation were self-perceived improvement in strength, supervision by a coach, and integration of the training in daily routine. Based on these insights, we redesigned and reworded the exercise cards, introduced three new exercises, and refined the training book. Discussion: The results of this study provided insights of the involved persons in the frame of the HOMEX intervention implementation with a particular focus on the long-term training behavior of the participants and their perception and experience with the exercise program. These findings enabled us to optimize the training material and adapt the structure of the program for sustainable further use in clinical and other settings.