I-hydrodatic underwater weighing, noma ukuhlolwa kwe-hydrostatic, iyindlela yokunquma ukubunjwa komzimba ( amafutha omzimba osindayo). Ilinganisa umthamo womzimba womuntu wonke usebenzisa i-Archimedes 'Principle of displacement. I-hydrodatic underwater weighing ibhekwe njengezinga legolide lokuhlolwa komzimba. Kodwa izindlela ezintsha, eziyinkimbinkimbi kakhulu zingenza ngaphansi kwamanzi anesisindo esingasebenzi esikhathini esizayo esiseduze.
Izimiso
Ukulinganisa kwamanzi kuncike kwi-Archimedes Principle echaza ukuthi amandla aphikisayo entweni engaphansi komhlaba ayilingana nesisindo somswakama oshiywa yinto. Ungasebenzisa lesi simiso ukucacisa amaphesenti omuntu womzimba womzimba ngoba ubukhulu bamanoni amaningi nobukhulu obungenamafutha buhlala njalo. Izicubu ezinomzimba ezinjenge-bone nomsizi, zinamandla kunamanzi, futhi izicubu ezinamafutha azincane kakhulu kunamanzi. Ngokuyinhloko, izimpukane zemisipha namafutha ahambayo. Ngakho-ke, umuntu onamafutha amaningi omzimba uyoba ngaphansi kwamanzi angaphansi kwamanzi futhi abe nokukhathazeka okuningi. Omunye onesisindo esiningi uzolinganisa ngaphezulu kwamanzi.
Indlela
Ukwenza ngaphansi kwamanzi anesisindo, umuntu ulinganiselwa kuqala ezweni elomile. Okulandelayo, lo muntu uzongena emanzini amaningi. Ngesikhathi ehlezi ngesilinganiso esikhethekile, wehliswa ngaphansi kwamanzi futhi wacela ukuxosha wonke umoya emaphashini akhe futhi ahlale engenamandla ngenkathi isisindo samanzi siqhathaniswa.
Le nqubo iphindwe kathathu futhi isilinganiso.
Ukubalwa okhethekile kuyasetshenziselwa ukunquma isisindo esinomzimba nesisindo somzimba bese kunquma amaphesenti omuntu omzimba womzimba. Ngokomthamo, amafutha anesisindo esingaphansi kwesisindo, futhi amakhilogremu angu-pounds, amafutha, nesisindo ngamunye unesisindo esiningi futhi asusa inani elithile lamanzi.
Ukunemba
Le ndlela yokuhlaziywa komzimba kubhekwe njengendlela enembile futhi isetshenziselwa ukwahlulela ukuthi ezinye izindlela zilungile yini. Ngokuvamile kuyahambisana futhi ngakho ingasetshenziswa ukukala inqubekela phambili. Kodwa-ke, umuntu ophethe ukuhlolwa kudingeka aqonde izimiso futhi enze izibalo ngendlela efanele.
Umthombo wephutha ekuvivinyweni kuyisidingo sokuthola wonke amaphaphu wombuzo uma ulinganisa ngaphansi kwamanzi, njengoba noma yikuphi okusele emoyeni kuzokwenza ukuba bathulule futhi baphonse imiphumela. Lesi sizathu esisodwa sokuthi kuthathwa izinsimbi ezintathu ezingaphansi kwamanzi ukuze ziqiniseke ukuthi ziyafana.
Lapho Uthola Ukuhlolwa Kwemvelo Emanzi Ngaphansi Kwamanzi
Amanyuvesi amaningi anikeza ukuhlolwa kwesisindo se-hydrostatic nezinkampani eziningana zinikeza ukuhlolwa komphakathi. Abanye, njenge-Body Fat Test inikeza insiza yokuhlolwa komzimba yomswakama we-hydrostatic. Ukuntuleka kokufinyelela okulula kwalokhu kuhlola kwenza kungaphansi kokuhle okumele kusetshenziswe, ikakhulukazi njengoba isilinganiso se-impedance ye-bioelectric manje sesatholakala kabanzi.
Amanye Amafomu Wokuhlola Amafutha Emzimbeni
Isisindo se-Hydrostatic kubhekwa njengilungile, kodwa kunamanye ubuchwepheshe obusungulwa ukuthi bungase bubeke esikhundleni. Enye i-Pod Pod, esebenzisa umoya wokufuduka kwamanzi kakhulu njengoba i-hydrostatic isisindo isebenzisa umoya wokuhamba endaweni.
Enye i-X-ray absorptiometry yamandla amabili (i-DEXA), eyenza ukucuketfwa kwamaminerali kanye nokulinganisa amafutha nomzimba.
Ama-impedance amafutha omzimba we-impedance amafutha ayatholakala kakhulu ekusetshenzisweni kwekhaya nasezikoleni zezempilo. Basebenzisa amandla amandla kagesi aphansi. Noma kunjalo, banembile kakhulu futhi bancike ezinhlobonhlobo eziningana. Ukusebenzisa abaqashi bamanoni nokwenza izilinganiso eziningana nakho kuyatholakala futhi kulula ukukwenza.