Final answer:
During pregnancy, moderate-intensity aerobic activity is recommended, which includes exercises like walking, swimming, and cycling for about an hour per day while avoiding high-intensity activities.
Step-by-step explanation:
Recommendations for exercise during pregnancy include moderate-intensity aerobic activity. This form of exercise is described as an activity during which you can talk, but not sing. It is beneficial for the health of the mother and the development of the fetus when performed safely. The 2018 Physical Activity Guidelines suggest that moderate exercise programs, which could involve about 1 hour per day, can offer substantial health benefits. These activities include walking, swimming, and cycling, which fall into the category of aerobic exercises, reliant on oxygen for energy. Importantly, pregnant women should avoid intense weightlifting and high-impact sports due to the potential risks these activities pose.