Of the existing ones, this is the only model with step-by-step adjustable length, as well as a change in the tensile force of the expander.
Its advantages:
- changing length and tensile force (maximum 4 times), (elastic in one addition gives a load of 4 kg.);
- suitable for working out both small muscle groups (biceps, triceps, trapezoid, deltoids), and large (latitudinal backs, pectoral, quadriceps);
- comfortable handles with a soft coating;
- reliability and simplicity of a self-locking lock mechanism for adjusting the length and tensile strength of the expander;
- the ability to independently change the length change step (by adding additional nodes on the expander bundles).