New York – For the first time, researchers have established how much exercise women should be able to do for their age and found that their capacity is slightly lower than men’s.
It also declines a bit faster than men’s as they grow older.
Women whose exercise capacity was less than 85 percent of what it should be were twice as likely to die within eight years, the researchers found.
Until now, the only guidelines available were based on men, and it wasn’t certain whether they applied to women as well. But as more women are being included in medical research, gender differences in some diseases and other health issues are emerging.
The researchers found that to be true for fitness levels. They used the results of 5,721 exercise stress tests on women over 35 to figure out what should be considered normal for them compared with the established fitness levels for men.
“Women’s fitness levels seem to be lower regardless of her age than for men,” said Dr. Martha Gulati, a Chicago cardiologist who led the study.
While fitness declines with age for everyone, the research showed the difference between men and women becomes more pronounced with age, she said. Women lose about 1 percent of their exercise capacity per year, their study found.
“Given that we live longer, it just emphasizes the importance of fitness for women,” said Gulati.
Their findings are reported in today’s New England Journal of Medicine.
Treadmill stress tests are routinely used to diagnose heart disease, often after someone complains of symptoms such as chest pains or shortness of breath. The heart’s activity is monitored while the person walks on the treadmill.
Exercise capacity was estimated in metabolic equivalents, or METs,, based on the speed and grade of the treadmill. One MET is the amount of energy or oxygen used to sit quietly for a minute.
