Physical activity and cardiovascular risk factors: effect of advice from an exercise specialist in Australian general practice

Objective: To determine whether provision of individualised physical activi ty advice by an exercise specialist in general practice is effective in mod ifying physical activity and cardiovascular risk factors in older adults. Design: Randomised controlled trial of individualised physical activity adv ice, reinforced at three and six months (intervention) versus no advice (co ntrol). Setting: Two general practices in Adelaide, South Australia, 1996. Participants: 299 adults aged 60 years or more who were healthy, sedentary and living in the community. Main outcome measures: Changes to physical activity (frequency and duration of walking and vigorous exercise), selected cardiovascular risk factors (b lood pressure, body weight, serum lipid levels) and quality of life over 12 months. Results: Self-reported physical activity increased over the 12 months in bo th groups (P < 0.001). The increase was greater for the intervention than t he control group for all measures except time spent walking (P < 0.05). Mor e intervention than control participants increased their intention to exerc ise (P < 0.001). Serum levels of total and low-density lipoprotein choleste rol and triglycerides fell significantly over the 12 months to a similar ex tent in the two groups. No other significant changes in cardiovascular risk factors were seen. Quality-of-life scores decreased over the 12 months. Th e decrease was significantly greater among intervention than control women, but not men, for emotional well-being (P = 0.02), physical well-being (P = 0.04) and social functioning (P = 0.04). Discussion: Provision of general practice-based physical activity advice re inforced three-monthly produced a sustained increase in self-reported physi cal activity. However, there were no associated changes in clinical measure s of cardiovascular risk factors and minimal changes in quality-of-life mea sures.