Effects of concurrent exercise training on muscle dysfunction and systemic oxidative stress in older people with COPD.
Julian AlcazarJose Losa-ReynaCarlos Rodriguez-LopezRoberto Navarro-CruzAna Alfaro-AchaIgnacio AraFrancisco J García-GarcíaLuis M AlegreAmelia Guadalupe-GrauPublished in: Scandinavian journal of medicine & science in sports (2019)
Oxidative stress is associated with disease severity and limb muscle dysfunction in COPD. Our main goal was to assess the effects of exercise training on systemic oxidative stress and limb muscle dysfunction in older people with COPD. Twenty-nine outpatients with COPD (66-90 years) were randomly assigned to a 12-week exercise training (ET; high-intensity interval training (HIIT) plus power training) or a control (CT; usual care) group. We evaluated mid-thigh muscle cross-sectional area (CSA; computed tomography); vastus lateralis (VL) muscle thickness, pennation angle, and fascicle length (ultrasonography); peak VO2 uptake (VO2peak ) and work rate (Wpeak ) (incremental cardiopulmonary exercise test); rate of force development (RFD); maximal muscle power (Pmax ; force-velocity testing); systemic oxidative stress (plasma protein carbonylation); and physical performance and quality of life. ET subjects experienced changes in mid-thigh muscle CSA (+4%), VL muscle thickness (+11%) and pennation angle (+19%), VO2peak (+14%), Wpeak (+37%), RFD (+32% to 65%), Pmax (+38% to 51%), sit-to-stand time (-24%), and self-reported health status (+20%) (all P < 0.05). No changes were noted in the CT group (P > 0.05). Protein carbonylation decreased among ET subjects (-27%; P < 0.05), but not in the CT group (P > 0.05). Changes in protein carbonylation were associated with changes in muscle size and pennation angle (r = -0.44 to -0.57), exercise capacity (r = -0.46), muscle strength (r = -0.45), and sit-to-stand performance (r = 0.60) (all P < 0.05). The combination of HIIT and power training improved systemic oxidative stress and limb muscle dysfunction in older people with COPD. Changes in oxidative stress were associated with exercise-induced structural and functional adaptations.
Keyphrases
- oxidative stress
- skeletal muscle
- computed tomography
- chronic obstructive pulmonary disease
- ischemia reperfusion injury
- dna damage
- high intensity
- lung function
- contrast enhanced
- magnetic resonance imaging
- cross sectional
- physical activity
- induced apoptosis
- palliative care
- healthcare
- randomized controlled trial
- magnetic resonance
- resistance training
- blood pressure
- mental health
- positron emission tomography
- dual energy
- cystic fibrosis
- body composition
- clinical trial
- chronic pain
- endoplasmic reticulum stress
- pain management
- study protocol
- amino acid
- heat shock
- radiation therapy
- middle aged
- placebo controlled