What are the elements of a good exercise routine in pregnancy?

Low impact and fun: Aim to maintain fitness, not set records. Go for 30-45 minutes with a target hr or 140-150. Walking, on an incline treadmill or in a hilly area, provides an excellent workout, and is easy on the joints. Avoid getting overheated and stay hydrated; this may mean going indoors, especially here in texas! consider signing up for a water aerobics class or swimming. Prenatal yoga also a good choice.

OB specific..: This depends on a variety of factors (pregnancy stage, your age, coexisting conditions, general health, philosophy of your ob). Developing a relationship with her/him to track your progress together is advisable. This is a 3-way partnership, after all..Mother, baby, ob. Really.