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Effects of a theory-based exercise intervention on physical activity levels and health-related outcomes in older people with chronic diseases

Geriatr Gerontol Int. 2022 Dec 27. doi: 10.1111/ggi.14520. Online ahead of print.

ABSTRACT

BACKGROUND: The benefits of physical activity are well-documented, and the prevalence of physical inactivity is high in older patients with chronic diseases. This study aimed to investigate the impact of an aerobic exercise intervention based on the capacity, opportunity, motivation-behavior (COM-B) model on physical activity and health-related outcomes in this population.

METHODS: Thirty-five participants were randomly assigned to the intervention group (IG) for an exercise intervention based on the COM-B model, and 33 were assigned to the control group (CG) for usual care. Physical activity levels, daily steps and bone mineral density T-value, body mass index, waist-hip ratio, subendocardial myocardial viability rate, central arterial pressure, growth index, brachial-ankle pulse wave velocity, ankle-arm index were measured at baseline, during the 12-week intervention, and after the 12-week follow-up.

RESULTS: Compared with the CG and pre-intervention, total physical activity in the IG increased significantly (P < 0.05); however, after the 12-week follow-up, total physical activity decreased. At the same time, the average daily steps of the elderly in both groups increased. Compared with the CG, at the 12-week follow-up, the bone mineral density T-value in the IG was significantly improved (P < 0.05). Compared with the pre-intervention values, during the 12-week intervention, bone mineral density T-value, body mass index, waist-hip ratio, subendocardial myocardial viability rate and central arterial pressure were significantly improved (P < 0.05); after the 12-week follow-up, brachial-ankle pulse wave velocity and ankle-arm index were significantly improved (P < 0.05). No statistically significant changes in the growth index were detected, independent of the group and time.

CONCLUSION: Theory-based exercise interventions can change the physical inactivity behavior of older people with chronic diseases, effectively promoting physical activity and improves bone mineral density T-value, controls body weight, and reduces cardiovascular risk and physiological indicators related to atherosclerosis. Geriatr Gerontol Int 2022; ••: ••-••.

PMID:36573456 | DOI:10.1111/ggi.14520

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