The trainers at CrossFit 100 came to the intense style of exercise through different channels. The founder changed her career path from fashion designer to fitness. One instructor found CrossFit after years of plugging away at a boring gym routine, and another fought crippling back pain with CrossFit. Together, they lead students of all fitness levels through intense, scalable workout programs that make use of full-body, functional fitness techniques using equipment such as sandbags and ropes. And, since the routine is constantly varied, participants avoid plateaus while constantly building strength, endurance, speed, and agility.