The Crunch ndi masewera olimbitsa thupi a m'mimba omwe amayang'ana minofu yapakati, makamaka rectus abdominis, kuthandiza kusintha kaimidwe, mphamvu, ndi mphamvu za thupi lonse. Ndioyenera kwa anthu pamilingo yonse yolimbitsa thupi, kuyambira oyamba kumene mpaka othamanga apamwamba, chifukwa champhamvu yake yosinthika. Anthu angafune kuchita masewera olimbitsa thupi chifukwa amathandizira kuti azitha kuchita masewera olimbitsa thupi, amathandizira masewera olimbitsa thupi, komanso amathandizira zochitika zatsiku ndi tsiku.
Inde, oyamba kumene angathe kuchita masewera olimbitsa thupi a Crunch. Ndi masewera olimbitsa thupi omwe amakhudza minofu ya m'mimba, makamaka rectus abdominis. Komabe, ndikofunikira kuphunzira njira yoyenera kuti mupewe kuvulala ndikukulitsa zotsatira. Oyamba kumene ayenera kuyamba pang'onopang'ono, ndi chiwerengero chochepa chobwerezabwereza, ndipo pang'onopang'ono awonjezere pamene mphamvu zawo ndi chipiriro zikukula. Ngati mukumva kusapeza bwino kapena kuwawa, ndikofunikira kusiya kuchita masewera olimbitsa thupi ndikuwonana ndi akatswiri olimbitsa thupi kapena dokotala.