Mokokotlo oa Mpa o ikoetlisa mesifa ea mpa ea hao e bohareng. Tšoara li-handle le ho crunch ka ho hula litsoele tsa hao ho ea mangoleng a hao. Mesifa e ka lehlakoreng la mpa ea hao e ka sebetsoa haeba setulo se sothehile. Mechine ea crunch hangata e sebelisa khanyetso e eketsehileng ka mokhoa oa li-stacks tse khethiloeng tsa boima kapa ho kenya lipoleiti, 'me hangata e etsoa bakeng sa li-reps tse itekanetseng ho isa ho tse phahameng, joalo ka li-reps tse 8-12 ka sete kapa ho feta, e le karolo ea karolo e shebaneng le ab ea boikoetliso.