CrossFit remixes a long lineup of functional push, pull, and hurl movements that incorporate yoga, boot camp, cross fitness, and more. Kettlebells are an integral part of the routines, as they provide unmatched natural fitness via fluid, powerful, and nearly injury-proof techniques. Though the intensity is high, both men and women of all ages and fitness experience are welcome. The CrossFit program is designed for universal scalability for fitness buffs of all makes and models. Many CrossFitters find the discipline addictive because of the fast, demonstrable results achieved through hard work and external motivation. Side effects of CrossFit training may include: shearing apart newly tight-fitting clothing by simply breathing, and flying into the stratosphere with one push-up.