Gymnastic machine for weightlifting , comprising: - a load-bearing frame , - two opposite first lateral guides , extending in a first vertical direction (X1), - two first slides each slidingly constrained on a corresponding first lateral guide , - two opposite second lateral guides , extending in a second direction (X2) transversal to said first vertical direction (X1), and each defined on board of one of said first slides , - two second slides each slidingly constrained on a corresponding second lateral guide , - a lifting bar , each of the ends of said lifting bar being constrained to a corresponding second slide , - motorised transmission means configured to apply on said first slides either an opposing force to an upward thrust force, or a downward traction force, characterized in that said motorised transmission means comprise two electric motors each of which is configured to actuate a corresponding longitudinally developed flexible element , each longitudinally developed flexible element being connected at a first end to the lower part of a first slide of the two first slides, and at the second opposite end being connected to the upper part of the same first slide , said motorised transmission means comprising, for each longitudinally developed flexible element : - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element coming from the said electric motor towards the said lower part of the said first slide , - at least one upper pulley configured and positioned to deflect the said longitudinally developed flexible element towards an upper part of the said first slide . - a load-bearing frame , - two opposite first lateral guides , extending in a first vertical direction (X1), - two first slides each slidingly constrained on a corresponding first lateral guide , - two opposite second lateral guides , extending in a second direction (X2) transversal to said first vertical direction (X1), and each defined on board of one of said first slides , - two second slides each slidingly constrained on a corresponding second lateral guide , - a lifting bar , each of the ends of said lifting bar being constrained to a corresponding second slide , - motorised transmission means configured to apply on said first slides either an opposing force to an upward thrust force, or a downward traction force, characterized in that said motorised transmission means comprise two electric motors each of which is configured to actuate a corresponding longitudinally developed flexible element , each longitudinally developed flexible element being connected at a first end to the lower part of a first slide of the two first slides, and at the second opposite end being connected to the upper part of the same first slide , said motorised transmission means comprising, for each longitudinally developed flexible element : - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element coming from the said electric motor towards the said lower part of the said first slide , - at least one upper pulley configured and positioned to deflect the said longitudinally developed flexible element towards an upper part of the said first slide . - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element coming from the said electric motor towards the said lower part of the said first slide , - at least one upper pulley configured and positioned to deflect the said longitudinally developed flexible element towards an upper part of the said first slide . <EOS>