EQUIPMENT FOR ISOTONIC TRAINING
One of the benefits of using isotonic machines is first and foremost the greater security of use. In fact, it is almost impossible, during training with one of these machines, to damage the body as the weight is not suspended but fixed and therefore can not hit or fall on those who use it.
Another advantage is the type of exercises that, being mainly monoarticular, give greater muscular isolation.
Learning times are much shorter. In fact, with constrained movements, the end result will always be the same regardless of the applied force and direction given to the tool.
They are therefore perfect for the beginner who does not have good coordinating abilities yet, and movements can be easily assimilated. The disadvantages in the use of isotonic machines, however, relate to movements that are stereotypical, that is, movement is that and can not be altered, as well as the execution speed that is reduced and at an ever-increasing rate.
The major disadvantage, however, is the lack of coordinated engagement due to the constrained movements and the engagement of very simple gestures that mainly concern a single articulation (single-art exercises).
Being primarily mono-articular exercises, they stimulate a lower hormonal response. In some machinery where pulleys are present, the eccentric work is lower, while in the cams the tension and the muscular velocity are constant.
In most isotonic machines (but not all), it is not possible to verify either the amount of force or the velocity of movement that differs between the right and left parts of the body. In addition, these tools need external adjustment that sometimes (especially in excessively high or low subjects) does not respect the articular levers of the subject, leading to physiologically incorrect postures and therefore forced trajectories.
It is good to use them when you are totally inexperienced or when you need to train only a precise part of your body.