Work at your own pace. Do not try to compete with the instructor or other class members. Do not exceed the instructor's intensity. However, feel free to tone down on the days your energy is low. It is important to replace fluids.
Pregnant women have a tendency to dehydrate more rapidly.
Drink fluids before, during, and after your workout. If taking a class, make sure you can see the instructor and follow instructor regarding alignment and positions. Heart rate recommendations during pregnancy are 140 beats per minute. If you are unsure show to count your heart rate, ask an instructor. Ask your instructor to explain this test to you.