I-Back Extension inika uqeqesho lokumelana nenkululeko yokushukuma ukuze yonyuse amandla angaphakathi, ibhalansi, uzinzo kunye nokulungelelaniswa. Yenzelwe indawo encinci kunye nokuphakama okuphantsi ukuze ilingane nasiphi na isixhobo sokuqina komzimba, kulula ukuyisebenzisa. Ngee-weight stacks ezibonelela ngamandla amaninzi okuphakamisa kwisakhelo. Ifanelekile kwizibonelelo ezincinci okanye kwiindawo. Ngee-weight stacks kunye nesakhelo esifanelekileyo, kunye nezinye izixhobo, inikezela ngeentshukumo ezihambelanayo ukuya kwiqela lemisipha elimiselweyo. Inebhodi enceda abaqeqeshi bomzimba ekulungiseleleni kwaye inika iingcebiso zemithambo eyahlukeneyo. Ifanelekile kwizibonelelo ezixineneyo okanye ezingenabantu.