Fitness is a workout with a progressive increase in workload that fully corresponds to the principle that underlies the modern exercise-training program. It includes the constant increase in cargo which boosts strength of muscles and their mass. This type of exercise successfully shapes the body, strengthens bones and ligaments and cartilage, and increases the thickness and density of capillaries in muscle. It also has a beneficial effect on general health status and physical ability, helps you reduce stress and tension of everyday life, reduce or control body weight, and helps you become more disciplined and motivated.