A new study out of the University of IL at Chicago found that white men who exercised at least 7 and a half hours a week were 86 percent more likely to experience a buildup of plaque in the arteries.
Study co-creator Dr Jamal Rana, a cardiologist at Kaiser Permanente in Oakland stated: "Abnormal amounts of activity after some time may cause weight on the corridors prompting higher CAC".
The participants were divided into three groups- those who exercised less, those who met the U.S. department of health's recommended guidelines for physical activity, and those who exceeded those guidelines.
Researchers at the University of IL at Chicago looked at the exercise habits of 3,175 participants for a 25 year-long period and found that white men who exercised a lot were more likely to build up plaque in their arteries which can lead to severe cardiac problems.
In any case they found that at the best level of activity, there was no additional hazard for dark men, however a 86 percent expanded hazard for white men.
Deepika Laddu, assistant professor of physical therapy, said: "We expected to see that higher levels of physical activity over time would be associated with lower levels of CAC".
According to the researchers, the current advised standard is at least 2 hours and 30 minutes a week of moderate exercise or 1 hour and 15 minutes of strenuous aerobic workouts for adults. CAC served as the warning sign to doctors in determining the heart condition of patients.
Liberty Global PLC (LBTYA) Short Interest Update
Pivotal Research maintained Liberty Global plc - Class A Ordinary Shares (NASDAQ: LBTYA ) rating on Friday, January 15. Capital World Investors decreased Liberty Global Plc Cl A (LBTYA) stake by 94.05% reported in 2017Q2 SEC filing.
"At the end of the day, exercise is medicine, and I really don't want people who read this paper to think this is distracting away from that message", Ludu said.
"The results of the present study showing a relationship between higher doses of PA and CAC development suggest yet another possible mechanistic explanation for the existence of an upper limit for CV benefit", Laddu and co-authors wrote.
There's such a thing as too much exercise, a new study suggests - at least for middle-aged white men.
But after breaking the numbers down further, the authors determined that only high-exercising white men faced a greater risk for developing plaque build-up then their low-exercising peers.
Instead, Laddu and her colleagues found that participants in trajectory group three, or those who exercised the most, were 27 percent more likely than those in trajectory group one to develop CAC by middle age.
"But again, we can't say physical activity is causing plaque build-up", Laddu reiterated. For one, she noted that very few of the high exercisers were black, making it hard to draw definitive conclusions.
There's more information on exercise and heart health at American Heart Association.