Arm separation strength equipment

Dilution of hands

— arm extension exercise with weights. A kind of opposite to the butterfly (see the relevant paragraph): similar in execution technique (for this, the same set of stops can even be used, switched to different modes), but the main effort is directed in the opposite direction. However, the technique for performing hand dilutions in different simulators can be different: sitting with straight arms, with bent arms, or lying down. In these options, the target muscle groups will also differ. So, doing the exercise while sitting helps primarily strengthen the back of the deltoid muscles, as well as the development of the rhomboid and trapezius muscles; and work lying down loads mainly the pectoralis major muscle. Nevertheless, dilution of the hands is anyway referred to as isolating exercises — that is, aimed at individual muscles.

Note that this exercise (primarily lying down) can also be performed with free weights, however, the simulator gives a more uniform load, with less likelihood of injury.