The main outcome of this study is that a 12-week community-based physical exercise program may significantly improve some cardiovascular risk factors and health-related quality of life (HRQoL) measures, including systolic BP, HLD-C, triglyceride-HDL-C ratio, physical capacity, physical function and general health scores.
Combined training protocols with aerobic and resistance training are recommended as non-pharmacological treatments to prevent hypertension and seem to be the most suitable for elders, deconditioned individuals and hypertensives (Herrod et al., 2018). Physical exercise can improve significantly cardiorespiratory fitness and some cardiometabolic biomarkers in adults without cardiovascular disease. Moreover, exercise improves cardiovascular risk factors such as hypertension, dyslipidemia and type II diabetes (Volpe et al., 2018). For instance, exercise lowers blood pressure, LDL-C, triglycerides, improves glucose-insulin homeostasis and raises HDL-C (Seron, Lanas, Pardo Hernandez, & Bonfill Cosp, 2014). In our study, systolic BP was significantly decreased. Higher triglyceride:HDL-C ratio and lower HDL-C are correlated with the risk of cardiovascular disease (Farrell et al., 2017). Several studies have found that physical exercise may play an important role in the maintenance of HDL-C concentrations in older people (Ihalainen et al., 2019). A 1% decrease in HDL-C has been associated with a 2–3% increase in cardiovascular disease risk (Expert Panel on Detection, Evaluation, and Treatment of High Blood Cholesterol in Adults, 2001). Based on our findings, it would appear plausible to suggest that participation in a physical exercise program of at least 12 weeks would be appropriate for decreasing cardiovascular disease risk as suggested by decreased systolic BP, triglyceride:HDL-C ratio and increase of HDL-C. Since the effects on triglyceride:HDL-C ratio and HDL-C occurred without concurrent changes in weight or diet, this may indicate that the physical exercise program alone can modify lipoprotein profile in older people.
The other cardiovascular risk factors investigated, including triglycerides, BMI, waist circumference were not influenced by the exercise program suggesting that a training period longer than 12 weeks is necessary to observe improvements in these measures 23. This is in line with evidence category A indicating that three or more months of moderate-intensity exercise elicits cardiovascular adaptations in healthy older adults 10. Also, combined therapeutic or preventive strategy involving dietary, lifestyle modifications and pharmaceutical should be considered.
Sedentary behaviors are independently associated with physical, functional, mental and cognitive health among older adults in retirement communities (Wilson et al., 2019). Our physical training program led to an improvement of physical capacity, physical function and general health. Our program provides further support for the efficacy of a combined physical activity program on health-related quality of life measures in elderly women. Specifically, the physical and general health domains were significantly improved with our program. These physical domains appear to be strong and independent predictors of long term cardiovascular events (Bousquet et al., 2019). Moreover, health-related quality of life measures are associated with the investigated obesity-related cardiovascular risk factors including body mass index and waist circumference (Hyun et al., 2019). Health-related quality of life measures may be considered as cardiovascular risk factors, besides the Framingham five modifiable major risk factors – smoking, hypertension, diabetes, high cholesterol, and obesity – and two non-modifiable risk factors – age and sex (Ose et al., 2013).
An essential component for the implementation with success of our physical exercise intervention program was understanding the factors influencing the participants’ physical activity behavior. Six such factors that influence physical activity behavior are identified by Franco et al.: social influences, physical limitations, competing priorities, access difficulties, personal benefits of physical activity, and motivation and beliefs (Franco et al., 2015). The GrOup-based physical Activity for oLder adults (GOAL) trial of Beauchamp et al. suggests that community exercise programs should attempt to engage in age-targeting but not necessarily gender-targeting among older adults (Beauchamp et al., 2018). Our physical exercise community program aimed at resolving these factors.
In summary, we conclude that a 3-month physical exercise intervention program was effective in decreasing cardiovascular risk and improving health-related quality of life measures in older people of two communities in Brazil.