2008 meta-nanlysis in volving chronically ill adults. This finding echoes those of earlier meta-analyses of physical activity interventions in older adults. It’s possible that patients misinterpret recommendations for low-intensity physical aclieving that they represent no meaningful change from their current physical activity, or that they experience grenter real or perceived benefit from more intense physical ac-tivity. A study of older adults with knee osteoarthritis found that adherence was greater (84%)among those participating in a high-intensity, progressive strength training program than among those participating in a nutrition education program (65%).similarly, an in-tensive,water-based exercise program increased phys-ical activity among adults with rheumatoid arthritis.