This form of exercise called Powerlifting squat. It is a different kind of sport as well. Powerlifting work like other forms of heavy resistance training, strengthen your skeleton and reduces your risk of injury in other sports and activities.
While the rules for the powerlifts remain specific, the general benefits of powerlifting go far beyond conventional lifting. It is a very intense form of exercise and burns a great many calories. Many of the activities in powerlifting improve other abilities, including speed and vertical jump.
So, it is a really good form of exercise which helps in strengthening the muscles of your legs, back and upper body. It is a good fitness regime for the boxers but always begins your exercise with a warm-up routine.