Bo and Rae Kit are more than just husband and wife—they're also co-owners of CrossFit Fontana. The duo opened their gym after the CrossFit method—which rolls out a different strength-training and cardio-fueled Workout of the Day each day—put them on the fast-track to the fitness goals. Now they share that method with others through a packed schedule chock full of classes for all ages and fitness levels. Though the workouts vary, they consistently contain functional moves such as squats, burpees, and lunges as well as weight-lifting routines and calisthenics. The result is a full-body workout that works every muscle and every muscle's muscle.