Exercise is oftentimes cited every bit the best preventive medicine, but how much is likewise much for the hearts of middle-aged athletes?
Sports cardiologist Dr. Benjamin Levine led a study, forthwith published inwards JAMA Cardiology, to expose the answer. Dr. Levine is a Professor of Internal Medicine too Director of the Institute for Exercise too Environmental Medicine, a collaboration betwixt UT Southwestern Medical Center too Texas Health Presbyterian Hospital Dallas.
What is coronary calcium scanning too why is it important?
Coronary calcium scanning is an imaging examination that helps physicians variety out patients without cardiac symptoms every bit low, intermediate, or high opportunity for view attack. It represents how much calcium (and hence cholesterol deposits) has accumulated inwards the blood vessels that provide the heart. The scan tin attain the sack aid physicians decide the bespeak for medication, lifestyle modification, too other risk-reducing measures.
"The inquiry has never been whether practice is skillful for you, but whether extreme practice is bad for you. For the yesteryear decade or so, there's been increasing describe organisation that high-volume, high-intensity practice could hurt the heart. We works life that high volumes of practice are safe, fifty-fifty when coronary calcium levels are high," Dr. Levine said.
High-volume, high-intensity practice was defined inwards this study every bit at to the lowest degree 5 to vi hours per calendar week at a footstep of 10 minutes per mile. The average sum of high-intensity practice inwards this grouping was 8 hours per week.
Coronary calcium is a footprint of atherosclerosis, a illness inwards which plaque builds upwardly inwards the arteries too gives rising to view laid on too stroke. When coronary calcium is detected inwards the heart, the clogging procedure inside the blood vessels has begun. The bulk of high-intensity athletes had depression levels of coronary calcium, though their odds of having higher levels were xi percentage greater than men who exercised less. Most importantly, the researchers works life that higher calcium scores did non enhance the high-intensity athletes' opportunity for cardiovascular or all-cause mortality.
Dr. Levine studied information from the Cooper Center Longitudinal Study. Influenza A virus subtype H5N1 full of 21,758 to a greater extent than oftentimes than non well for y'all men ages xl to eighty too without cardiovascular illness were followed for mortality betwixt 1998 too 2013. The athletes, a bulk of them inwards centre age, reported their physical action levels too underwent coronary calcium scanning. Most were predominantly runners, but to a greater extent than or less were cyclists, swimmers, or rowers. Influenza A virus subtype H5N1 subgroup of athletes trained inwards 3 of these sports.
Women were non included inwards the study every bit their mortality rates are lower than for men.
Despite the findings that extreme practice does non enhance view illness risk, Dr. Levine advises against using the protective number of practice to excuse pathetic lifestyle habits. "You cannot overcome a lifetime of bad behaviors - smoking, high cholesterol, hypertension - merely from doing high levels of physical activity, too so don't purpose that every bit a magical cure," said Dr. Levine, who holds the Distinguished Professorship inwards Exercise Sciences at UT Southwestern.
He also recommends caution when starting a novel preparation program. "If y'all desire to develop for a marathon, y'all receive got to receive got a long-range conception to gear upwardly up piece of cake earlier y'all accomplish those volumes too intensity of exercise."
"The known benefits of regular physical action inwards the full general population include decreased mortality, view disease, diabetes, too many other medical weather condition which reminds us how of import it is participate inwards regular physical action every bit recommended yesteryear the 2018 Physical Activity Guidelines," said Dr. Laura DeFina, Chief Scientific Officer of The Cooper Institute too co-author of the study. "The electrical current study shows no increased opportunity of mortality inwards high-volume exercisers who receive got coronary artery calcium. Certainly, these high-volume exercisers should review their cardiovascular illness opportunity alongside their main aid doc or cardiologists too the study results provide helpful clinical guidance."
"The around of import take-home message for the exercising populace is that high volumes of practice are safe. The benefits of practice far outweigh the youngster opportunity of having a footling to a greater extent than coronary calcium," Dr. Levine said.