Strength training is usually carried out on: simulators with built-in weights, machines for working with free weights (barbells, dumbbells). In simulators with built-in weights as the weights are flat cargo Held in the package locks, and moving up and down on the guide runners, in some models, as goods can be used pancakes in different weights. These simulators are designed in such a way as to automatically adjust to the changing force of contraction of the muscles through the use of cams or lever mechanisms. Therefore, they may purposefully selected muscle group to work out without involving work the surrounding muscles. Trainers can be calculated only for study of a single muscle group (usually they are combined in the fitness rooms) or involve multiple units to work out major muscle groups, ie Universal, which often are used for training at home.
Free weights allow to load not only the selected muscle group, but also other muscles that help you perform an exercise (muscles, synergists). This allows weights to increase the weight used for all major muscle groups, thereby encouraging the rapid growth of muscle fibers. Working with weights helps to improve coordination, as need to monitor preservation of balance and the position of the projectile. Several years ago a new type of strength training equipment, where the base load uses body weight during the course. This multi-purpose simulators, which can simultaneously develop strength, endurance and flexibility. In these simulators the load level can be changed by adjusting the angle of the bench, and increase the load can be achieved through the use of additional weight disks. When choosing a trainer for strength training should pay attention to the reliability of the design (the maximum weight that can withstand the design), the weight of the cargo stack and the amount available for exercise. Choosing a trainer to work with free weights, take a look at the width between the uprights, adjustable height legs, adjustable incline bench, the presence of additional devices.