This hardware takes again the principle of the (vertical) Leg Press, with the difference which the weight rests here on the back of the basin (the bust being ahead leaning).

If it is not recommended to use heavy loads (the back would then suffer from it), the movement carried out makes it possible to work the whole of the calves well, especially the
gastrocnemius.

A palliative with this machine consists in taking support on an unspecified support, the bust leant ahead, and to carry out extensions of the feet with a person on his back.