RESUMEN
Physical activity reduces the risk for comorbidities, but little is known about barriers to exercise among older adults living with HIV. Three focus groups were conducted among 19 adults living with HIV, aged ≥ 50 years, who were enrolled in or recently completed a supervised exercise intervention. Sessions were recorded, transcribed, and coded first using inductive methods. All participants were male, and the majority were white, non-Hispanic; 53% were receiving disability benefits. All had suppressed HIV infection on antiretroviral therapy, with almost 20 years since HIV diagnosis. Participants noted a lack of self-efficacy, motivation, and physical limitations that contributed to a sense of "disability" as barriers to exercise prior to the intervention. Through social support and improvements in self-efficacy, participants were motivated to start and continue exercising. Perceived sense of disability may impede (or interfere with) exercise initiation and maintenance; self-efficacy and social support may facilitate exercise maintenance in older adults living with HIV.
Asunto(s)
Personas con Discapacidad/psicología , Ejercicio Físico , Infecciones por VIH/psicología , Grupos Focales , Infecciones por VIH/tratamiento farmacológico , Humanos , Masculino , Persona de Mediana Edad , Motivación , Autoeficacia , Apoyo SocialRESUMEN
OBJECTIVE: Whether older people living with HIV (PLWH) can achieve similar functional benefits with exercise as their uninfected peers and the ideal intensity of exercise needed for these benefits are not known. DESIGN: Sedentary adults (50-75 years) with or without HIV were recruited for 24 weeks of supervised endurance/resistance exercise. After 12 weeks of moderate-intensity exercise, participants were randomized to continue moderate-intensity or advance to high-intensity exercise for an additional 12 weeks. METHODS: Outcomes by serostatus and exercise intensity (moderate, high) were compared using linear and mixed effects regression models and controlled for baseline values or week 12 values. RESULTS: A total of 32 PLWH and 37 controls were enrolled; 27 PLWH (12 moderate/15 high) and 29 controls (15 moderate/14 high) completed 24 weeks. PLWH had significantly poorer physical function across nearly all baseline measures. Both groups had significant improvements in all functional measures. From 0 to 12 weeks, PLWH had significantly greater percentage improvements (mean, 95% confidence interval) than controls on VO2 max [5 (0, 10)%]; from 13 to 24 weeks, PLWH had significantly greater percentage improvements on stair climb [-5 (-10, -1)%], and the time to complete a 400-m walk [-3 (-5, -0)%]; all P less than 0.05. An interaction between exercise intensity and HIV serostatus was significant for measures of strength: PLWH randomized to high-intensity gained significantly more strength than moderate-intensity in bench and leg press [6 (0, 12)% and 10 (2, 17)% greater; both Pâ<â0.05]; controls had similar gains regardless of intensity. CONCLUSION: Both moderate-intensity and high-intensity exercise resulted in significant improvements in physical function; high-intensity exercise may impart greater strength benefits to PLWH.