Too Much Exercise or Too Little = CVD Risks
Two new studies published this week lend credence to the idea that when it comes to exercise, there apparently can be too much of a good thing.
In the first study, led by Dr Nikola Drca (Karolinska University Hospital, Stockholm, Sweden) and published online May 14, 2014 in Heart, investigators report that men who exercised for more than five hours per week when they were 30 years old had a significantly higher risk of developing atrial fibrillation later in life compared with men who exercised less.
The report also showed that older adults who walked or rode their bicycle for about an hour per day had a significantly lower risk of atrial fibrillation compared with older adults who almost never participated in such recreational physical activity.
In the second study, led by Dr Ute Mons (German Cancer Research Center, Heidelberg, Germany) and also published in Heart, the researchers studied the association of self-reported physical activity in 1038 subjects with stable coronary heart disease and confirmed previous findings of an increased risk of adverse events among inactive patients. However, they also found that those who participated in daily “strenuous” physical activity had an increased risk of dying from cardiovascular causes.
“Our data indicated a reverse J-shaped association of physical activity, especially with cardiovascular mortality,” write Mons and colleagues. “Both inactive and daily-active patients had increased hazards of mortality compared with the reference group of patients who were active two to four times per week, but with the hazards being highest in the inactive-patient group.”
Sources
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