CrossFit is an extremely efficient and effective way to get into world-class shape. CrossFit started at a maverick gym in Santa Cruz, and quickly spread to Olympic and professional athletes, police and military special operations units, champion martial artists, and (like most of us here at CrossFit NYC) everyday people looking for a serious kick in the butt. CrossFit workouts are functional, varied and intense. They also scale to any ability level—our members range from elite athletes to eighty-something grandmothers—so whatever shape you're starting from, you'll be able to jump right i...