The effects of exercise training in a weight loss lifestyle intervention on asthma control, quality of life and psychosocial symptoms in adult obese asthmatics: protocol of a randomized controlled trial

• Published in: BMC pulmonary medicine Vol. 15; no. 1; p. 124
• Main Authors: Freitas, Patricia D, Ferreira, Palmira G, da Silva, Analuci, Trecco, Sonia, Stelmach, Rafael, Cukier, Alberto, Carvalho-Pinto, Regina, Salge, João Marcos, Fernandes, Frederico L A, Mancini, Marcio C, Martins, Milton A, Carvalho, Celso R F
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 21-10-2015; BioMed Central
• Subjects: Accelerometry; Analysis; Anxiety - psychology; Asthma; Asthma - complications; Asthma - physiopathology; Asthma - psychology; Asthmatics; Behavior Therapy; Body Composition; Breath Tests; Care and treatment; Depression - psychology; Exercise Test; Exercise Therapy - methods; Exercise Tolerance; Health aspects; Humans; Motor Activity; Muscle Strength; Nitric Oxide - analysis; Obesity - complications; Obesity - psychology; Obesity - therapy; Patient outcomes; Physiological aspects; Prevention; Psychological aspects; Pulmonology; Quality of Life - psychology; Resistance Training - methods; Severity of Illness Index; Sleep disorders; Sleep Wake Disorders; Spirometry; Study Protocol; Treatment Outcome; Weight Reduction Programs - methods
• ISSN: 1471-2466; 1471-2466
• DOI: 10.1186/s12890-015-0111-2

Asthma and obesity are public health problems with increasing prevalence worldwide. Clinical and epidemiologic studies have demonstrated that obese asthmatics have worse clinical control and health related quality of life (HRQL) despite an optimized medical treatment. Bariatric surgery is successful to weight-loss and improves asthma control; however, the benefits of nonsurgical interventions remain unknown.
This is a randomized controlled trial with 2-arms parallel. Fifty-five moderate or severe asthmatics with grade II obesity (BMI ≥ 35 kg/m(2)) under optimized medication will be randomly assigned into either weight-loss program + sham (WL + S group) or weight-loss program + exercise (WL + E group). The weight loss program will be the same for both groups including nutrition and psychological therapies (every 15 days, total of 6 sessions, 60 min each). Exercise program will include aerobic and resistance muscle training while sham treatment will include a breathing and stretching program (both programs twice a week, 3 months, 60 min each session). The primary outcome variable will be asthma clinical control. Secondary outcomes include HRQL, levels of depression and anxiety, lung function, daily life physical activity, body composition, maximal aerobic capacity, strength muscle and sleep disorders. Potential mechanism (changes in lung mechanical and airway/systemic inflammation) will also be examined to explain the benefits in both groups.
This study will bring a significant contribution to the literature evaluating the effects of exercise conditioning in a weight loss intervention in obese asthmatics as well as will evaluate possible involved mechanisms.
NCT02188940.