Instead of investing a lot of money in accessories like baby swings or bouncy infant seats, purchase one or two types of baby carriers that can do double duty: keep your baby amused and soothed and help you get back into shape. Exercise is also a great way to get out of the house and is invigorating for both you and the baby.
There are many different types of baby carriers. Many mothers like slings, the unstructured carriers that hang loosely in front with the baby cradled inside. There are also front pack carriers in which the baby sits vertically in a cloth seat within a carrier that is attached to your body.
As the baby gets older, many mothers like to use a backpack or stroller to walk the baby. Many strollers are specially designed for jogging, or have heavy tread on the tires. Be on the lookout for mother/baby exercise classes, baby swim classes, and yoga or dance classes that welcome new mothers.