Hydraulic strength machines
Hydraulic
— loading systems based on the use of closed cylinders filled with a special liquid; the actual load in such systems is created due to the resistance that occurs when the piston moves in such a cylinder. This provides a number of advantages compared to units using weight-and-lock systems or free weight. Firstly, hydraulics allows you to create a more uniform load; moreover, directed strictly along the piston. Secondly, resistance arises when moving in both directions — thus, the hydraulic simulator provides training for two muscles of the opposite purpose at once (the so-called antagonist muscles). Third, hydraulic cylinders are small and light, especially when compared to traditional weights.Among other things, machines with such load systems are widely used in express training gyms, where people do not so much for professional body shaping, but for pleasure and relaxation. The main disadvantages of hydraulics are a rather high price and difficulty in repair.
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