The ideal amount of physical activity to improve quality of life and symptoms in lung cancer patients: A systematic review.

e23158 Background: The symptoms which burden lung cancer patients contribute to a vicious cycle of physical inactivity as the disease progresses. Some studies have shown that exercise is feasible and safe for this population, and it improves their symptoms and quality of life. However, the current recommendations are non-specific, and little is known about the optimal amount and type of exercise in this scenario. Here we aimed to identify a specific recommendation of physical activity that could work more efficiently, benefiting lung cancer patients, in terms of diminishing their symptom burden and improving quality of life. Methods: A systematic review was undertaken through structured searches on PubMed, Medline, Embase, Scopus, Web of Science and SciELO. The search protocol was registered on the Prospero platform. Rayyan QCRI was used for data extraction and determining eligible studies after a blind screening of titles and abstracts by the three authors. The Physiotherapy Evidence Database (PEDro) scale was used for quality assessment of each eligible trial in regards of risk of bias. Trials which had clear eligibility criteria and a summary score equal or superior than 6 were considered to have low risk of bias, and accepted for full text review. Results: From September/1998 to January/2019, a total amount of 1998 studies were returned from the aforementioned databases, and 17 studies were established to be eligible for quality assessment. All the 17 quality-assessed studies were randomized clinical trials. However, two of them did not clearly report the eligibility criteria and were immediately excluded. Five other studies were considered to have high risk of bias. Therefore, we considered only 10 trials to be fully reviewed, including 843 patients. Only 3 trials found significant improvement in the quality of life after their interventions, and included 243 patients. Two studies associated aerobic exercise and resistance training from 10 to 20 weeks post surgery, while the other studied intervention was Tai Chi for 10 days after each chemotherapy cycle. Conclusions: Evidence from this review suggests that exercise may improve quality of life of lung cancer patients. However, we could not identify an ideal amount nor type of physical activity given the limited available data and the heterogeneity of methods. Further studies are warranted.