The family that works out together, stays together! Over the weekend, Carrie Underwood shared a cute snap on Instagram that shows her hitting the gym with her 2-year-old son Isaiah. "My boys make workouts fun," the 34-year-old captioned the snap, which shows her dressed in all-black exercise attire while doing a squat alongside Isaiah. She added the hashtag "#StayThePath." Underwood's husband Mike Fisher's got good reason to be hitting the gym these days, as the onetime NHL star recently announced that he's coming out of retirement to play again with the Nashville Predators.