Physicians' Academy for Cardiovascular Education

Dose-response association between physical activity, BMI and risk of heart failure

Relationship Between Physical Activity, Body Mass Index, and Risk of Heart Failure

Pandey A, LaMonte M, Klein L, et al. - J Am Coll Cardiol 2017;69:1129–42

Background

Large randomised studies assessing various therapies have failed to improve clinical outcomes among patients with HFpEF, which makes the primary prevention of this condition very important [1,2]. Leisure-time physical inactivity (LTPA) and obesity are important risk factors for the development of HF [3,4]. However, the contribution of different doses of LTPA and levels of BMI to different HF subtypes is unclear, and the optimal goals for HFpEF prevention are not known.

In this study, the dose–response relationship between LTPA levels, BMI, and risk of HFpEF and HFrEF was assessed, by using individual-level pooled data from 3 prospective cohort studies (WHI [Women’s Health Initiative], MESA [Multi-Ethnic Study of Atherosclerosis], and CHS [Cardiovascular Health Study]), including 51 451 participants.

Main results

Conclusion

In a pooled analysis from 3 prospective cohort studies, a dose–response association between LTPA, BMI, and risk of HF was observed, particularly in HFpEF patients. These findings suggest that adequate LTPA and appropriate BMI control are important for the prevention of HFpEF.

Editorial comment

In his editorial article [5], Shah summarises the strengths and limitations of the study by Pandey at all. The strengths include the large sample size and number of events, the used meta-analysis methodology and physical activity categories, and the exclusion of patients who developed HF within two years of study start-up. The limitations include the lack of a causal explanation for the findings, the fact that physical activity intensity was self-reported and missing confounders. The author ends: ‘In conclusion, Pandey et al. have provided strong evidence that lack of physical activity is associated with incident HFpEF. Given the critical need to focus on primary prevention to control HFpEF at the population level, the mounting evidence of the harms of a sedentary lifestyle on the heart and extracardiac organs involved in HFpEF, and the fact that physical inactivity is a modifiable risk factor with a low-cost treatment, the time is ripe for considering patient centered HFpEF prevention programs (“huff-puff health clubs”) as a strategy to curb the HFpEF epidemic.’

References

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Find this article online at J Am Coll Cardiol