While it's important that everyone aim for 30 minutes of heart-rate raising exercise a day, that doesn't mean you should be working up a sweat and working yourself into exhaustion in order to get in a good workout. Low-impact workouts--like a brisk walk or gardening--are good exercise models to live by. That run you take every morning? Not so much. It can actually do some serious harm.
How so? Well, first of all, according to a study published in Fertility and Sterility, rigorous exercise can have a negative impact on fertility for normal-weight women. Healthy-weight women who performed vigorous workouts, like fast cycling, running, and aerobics, were more likely to experience delays in their ability to conceive. Continue on for other ways your workout could be harmful.