The Truth About Exercising While Pregnant: It’s Okay to Work Hard

Sometimes it seems the only exercise options for pregnant women are easy swimming, gentle yoga, and walking carefully in a field of pillows. But if you’re not satisfied with those, you’re in luck: many activities are safer in pregnancy than bystanders and even your doctor may realize.

…There’s a tip in here for people who aren’t pregnant, too: if a pregnant woman is doing something you wouldn’t normally imagine a pregnant woman doing…chill out.

…Keeping up fitness, even if you’re slow and sluggish for the moment, helps you return next season: you’re only taking a few weeks or months off, instead of a year or more.

Source: The Truth About Exercising While Pregnant: It’s Okay to Work Hard

Oddly, iron deficiency wasn’t mentioned in the article.  Pregnancy can make you anemic because you’re increasing your blood volume by almost 50% in a short time. Anemia will make you tired and short of breath. Standard blood tests will show if you need iron supplements, but it can take a while to get back to normal levels, and exercising during that time will be difficult to impossible, depending on how anemic you are.  This may be why the fatigue hits so early in pregnancy – there are athletes who didn’t realize they were pregnant until they saw their performance declining.