Sitima yapamtunda ndi yofunika kwambiri pamayendedwe a njanji, yokhala ndi mawonekedwe ndi maubwino osiyanasiyana. Choyamba, njanjiyi imapangidwa ndi chitsulo champhamvu kwambiri, chomwe chimakhala ndi mphamvu zabwino kwambiri zonyamula katundu ndipo zimatha kupirira ntchito ndi zotsatira za sitima zolemera. Kachiwiri, pamwamba pake amathandizidwa mwapadera kuti awonetse kukana kwabwino, komwe kumatha kukana kukangana pakati pa gudumu ndi njanji ndikukulitsa moyo wautumiki. Kuonjezera apo, njanjiyo imakhala ndi kukhazikika kwazithunzithunzi bwino pansi pa kusintha kwa kutentha ndi zochitika zachilengedwe, kuchepetsa chiopsezo cha kuwonongeka ndi kuwonongeka.