Re:How do I keep my abs in shape without sit-ups?
The problem in pregnancy is that you shouldn’t lie down on your back when you exercise because it pinches off the circulation to the uterus. This problem doesn’t usually occur until the middle of the second trimester. You can use abdominal machines at the club that tense your abdominal muscles without having you lie down. Early in the first and second trimesters, however, should be fine to do sit ups.
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