Eminyakeni yamuva nje, izindawo zokugeza ngamanzi abandayo—ngezinye izikhathi ezibizwa ngokuthi ama-cold plunges noma ama-ice bath—zisuke endaweni yabadlali abaphambili zaya emikhubeni evamile yokuphila kahle. Ubufakazi besayensi obukhulayo obuvela ezifundweni zasekhaya nezamazwe ngamazwe busikisela ukuthi ukuchayeka njalo emanzini abandayo kungadlala indima ekuqiniseni ukusebenza komzimba nokuthuthukisa ukuqina komzimba.
Impendulo yomzimba iqala ngokuguqulwa kokushisa komzimba. Lapho umzimba ucwiliswa emanzini abandayo ngokuzumayo, imithambo yegazi iyancipha futhi ukujikeleza kwegazi kuqondiswa okwesikhashana ukuze kuvikelwe izitho ezibalulekile. Lapho uphuma endaweni ebandayo, kuvela ukuvuvukala kwegazi, okushukumisa ukugeleza kwegazi futhi kukhuthaze ukululama. Ucwaningo lubonisa ukuthi le nqubo ingase ivuselele ukukhiqizwa kwamangqamuzana athile omzimba, njenge-lymphocytes namaseli okubulala emvelo, abalulekile ekuvikeleni ezifweni.
Ngaphezu kwalokho, ukucwiliswa emanzini abandayo kukholakala ukuthi kuvuselela uhlelo lwezinzwa oluzimele, okwandisa amazinga e-norepinephrine—i-hormone ehlotshaniswa nokuqaphela nemiphumela yokulwa nokuvuvukala. Izifundo ezenziwe eYurophu zibonise ukuthi abantu abageza ngamanzi abandayo njalo bangase babe nokutheleleka okuncane komgudu wokuphefumula ophezulu uma kuqhathaniswa nalabo abangakwenzi. Nakuba imiphumela ihlukahluka futhi kudingeka izifundo eziningi ezinkulu, lo mkhuba ukhomba ekukhuleni okungenzeka kokuqina komzimba.
Ngombono obanzi, ukuchayeka emakhazeni kungasiza umzimba ukuthi uzivumelanise nokucindezeleka ngendlela ephumelela kakhudlwana. Ngokuphonsela inselelo uhlelo lokulawula ukushisa, abantu kancane kancane bakha ukubekezelelana, okungaholela ekuthuthukisweni kokuphathwa kokucindezeleka empilweni yansuku zonke. Lokhu kuqina okuguquguqukayo kubhekwa njengokwengeza okuwusizo ezindleleni zendabuko zokugcina impilo, njengokudla okunempilo nokuzivocavoca njalo.
Nokho, kubalulekile ukusondela ekugezeni ngamanzi abandayo ngendlela efanele. Ukucwiliswa ngokuzumayo noma isikhathi eside kungaba yingozi, ikakhulukazi kubantu abanezinkinga zenhliziyo. Ochwepheshe batusa ukuqala ngezikhathi ezimfushane—ngokuvamile ngaphansi kwemizuzu emibili—futhi kancane kancane ukwandisa ukuvezwa njengoba ukubekezelelana kukhula. Isiqondiso sochwepheshe siyanconywa kwabaqalayo.
Ekuphetheni, ukugeza ngamanzi abandayo kuyindlela ethembisayo nefinyelelekayo yokuthuthukisa ukusebenza komzimba kanye nokuqina. Ngokukhuthaza ukulawulwa kokushisa komzimba, ukusekela umsebenzi wokuzivikela komzimba, kanye nokukhuthaza ukuzivumelanisa nokucindezeleka, kunikeza isengezo esiphelele emikhubeni yesimanje yokuphila kahle. Nakuba kungesona isithasiselo sokunakekelwa kwezokwelapha noma imikhuba yokuphila enempilo, kungasebenza njengethuluzi eliwusizo ekufuneni impilo eqinile kanye nokumelana nezifo.