Becoming a mom changes everything—including your body. Between feeding, rocking, carrying, lifting a car seat, loading a stroller, and spending hours bent over changing tables or cribs, motherhood is surprisingly physical. And if you’re a new mom, you’ve probably already felt it: the sore back, tired shoulders, aching wrists, weak core, and constant fatigue that can come from the repetitive demands of caring for a baby. As a Doctor of Physical Therapy and mom to a 7-month-old, I’ve...