Ndi treadmill pansi pa madzi ( water treadmill ) mankhwala olimbitsa thupi, nthawi yayitali yolimbitsa thupi imaphatikizidwa ndi kukana kwamadzi. Izi zimapangitsa kuti mtima wamtima ukhale wopirira, zomwe zimathandizira kuti wodwalayo akhale wolimba mtima. Atha kugwiritsidwa ntchito m'zipatala, m'malo azachipatala, m'mahotela, m'nyumba, ndi m'ndege zapadera.