Working out of one of central Phoenix's first CrossFit gyms, CrossFit Full Strength's certified coaches put their charges through a mixed bag of exercises that changes each day. They do everything from clean and jerks to pull-ups and tractor-tire flipping. By changing routines, they work all muscle groups and stave off boredom. All exercises have one thing in common, though—they each combine everyday motions, such as pushing and pulling. Those movements, performed at a high intensity, result in a preparedness for any physical activity.