The aim of this paper was to point out the advantages and disadvantages of CrossFit training. During the last ten years, CrossFit training has become popular among recreational exercisers around the world as a group exercise program. The combination of short duration training with elements of gymnastics, athletics, weight lifting, Olympic lifting and other kinesiology activities is highly intensive and diverse way of training. CrossFit works on the development of the following physical abilities: cardiovascular and respiratory endurance, general endurance, strength, flexibility, power, speed, agility, balance, coordination and precision. So far, there have been no longitudinal studies that statistically prove the advantages and disadvantages of this type of training, but there is a small number of research that have prvoen positive effect on cardiovascular endurance and greater consumption of calories in a short period of time. In contrast, there are also a shoulder, knee and lumbar back injury displayed. Among other disadvantages, there is a fact of becoming an instructor in two days, gaining a certificate of the first level trainer which means one can conduct trainings after only a two-day eduction, and not acquiring technical performance of individual elements.