Brisk walking linked to lower risk of heart rhythm problems, study finds

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Walking at a brisker pace could lower the risk of a wide range of heart rhythm problems, according to a study.The peer-reviewed research, published in BMJ Heart, analysed data from 420,925 participants of the UK Biobank who had provided data on their walking speed.Of these, 81,956 gave more detailed data on the amount of time they spent walking at different paces.According to the study, a slow pace was defined as less than 3mph; steady/average pace as 3–4mph; and a brisk pace as more than 4mph.Just over 6.

5% of participants had a slow walking pace, 53% had an average walking pace and 41% had a brisk walking pace.Tracking these individuals for an average of 13 years showed that 36,574 participants (9%) developed some form of heart rhythm abnormality.After accounting for background demographic and lifestyle factors, an average or brisk walking pace was associated with, respectively, a 35% and 43% lower risk of all heart rhythm abnormalities compared with a slow walking pace.These higher walking speeds were also associated with lower risks of atrial fibrillation and other cardiac arrhythmias.While the amount of time spent walking at a slow pace was not associated with the risk of developing heart rhythm abnormalities, more time spent walking at an average or brisk pace was associated with a 27% lower risk.

Overall, around 36% of the association between walking pace and all heart rhythm abnormalities was influenced by metabolic and inflammatory factors.Demographic and lifestyle factors accounted for by the study included that participants reporting a faster walking pace were more likely to be men and tended to live in less deprived areas and have healthier lifestyles.Atrial fibrillation is a condition where the heart’s upper chambers beat irregularly and too fast, while ventricular arrhythmias occur when an abnormal heart rhythm starts in the lower chambers.Heart rhythm problems can increase the risk of stroke, heart failure and cardiac arrest if left untreated.They can occur when there is a problem with the electrical system that makes the heart beat.

The researchers noted that the study was observational, meaning that no firm conclusions could be drawn on whether walking at a brisk pace was a direct cause of a lower risk of heart rhythm abnormalities,The study was also limited by the fact the participants were self reported and did not reflect a broad spectrum of ages and ethnic backgrounds,The average age was 55, 55% were women and 97% were white,The researchers, led by Prof Jill Pell of the University of Glasgow, said: “This study is the first to explore the pathways underpinning the association between walking pace and arrhythmias, and to provide evidence that metabolic and inflammatory factors may have a role: walking faster decreased the risk of obesity and inflammation, which, in turn, reduced the risk of arrhythmia,“This finding is biologically plausible because cumulative epidemiological studies have shown that walking pace is inversely associated with metabolic factors, such as obesity, HbA1c [fasting glucose], diabetes, and [high blood pressure] which, in turn, are associated with the risk of arrhythmias.

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