Igama elithi "isikhungo sabantu sokudonsela phansi" sinethonya kuzo zonke izinto ezihlobene nokuhleleka, kufaka phakathi izinkinga ezifana ne-swayback kanye nokuhlelwa kwezinhlelo zokuzivocavoca nokunye okuningi.
Isikhungo somuntu sokuvuthwa yizindawo ezijwayelekile endaweni isikhala sesithathu, somuntu omningi.
Ungacabanga ngobuningi njengoba ukumelana nomzimba wakho ukunyakaza - ngamanye amazwi, inqwaba yayo.
Ngakolunye uhlangothi, isisindo somzimba womzimba wakho sisebenza ngaphansi kwethonya lokuvuthwa.
Ngamanye amazwi, inqwaba ibutho le-inertia njengoba lisebenza ngesisindo sakho. (Esikhathini esingaphandle, usuke ungenasisindo, kodwa ubukhulu bakho buhlala bufanayo. Lokhu kungenxa yokuthi esikhaleni sangaphandle amandla okuvunguza, okwenza i-inertia, ayenzi emzimbeni wakho.)
Uma ume, isikhungo sokuvuthwa kwemvelo ngokuvamile sitholakala phambi kwe-sacrum bone yakho, cishe ngezinga lesibili le-sacral.
Isikhungo Sokuvuthwa Okuchazwe Ngesibonelo
Enye indlela yokubheka lokhu ukuthi isikhungo sokuvuthwa komzimba (iphuzu) yisisindo lapho ubukhulu bomzimba bulinganisela khona. Leli phuzu lishintsha kuye ngesimo somuntu (izingalo phezulu / phansi, ukuncika, njll). Abadansi ababukayo, abaqeqeshi bama-gymnast kanye nabahamba ngezintambo eziqinile bahlinzeka ngezibonelo zendlela umzimba womuntu ongazivumelanisa ngayo nezinguquko phakathi nendawo yokuvuthwa ukuze kugcinwe ibhalansi, futhi nokuthi umuntu angakwazi kanjani ukunqoba ngokuphumelelayo imiphumela yokudonsela phansi kanye ne-inertia emzimbeni.
Ngokuvamile, isikhungo sokuvuthwa komzimba sikhona phambi kwe-sacrum bone yakho, cishe ngezinga lesibili le-sacral. (I-sacrum yenziwe ngamathambo amahlanu ahlanganiswe ndawonye.) Ngakho lapho ukhona emhlabeni jikelele isisindo sakho noma isisindo sakho, kucatshangwa ukuba kugxile kule ndawo phambi kwe- sacrum yakho. Ukudonsa phansi kwamandla adonsela phansi (umugqa wokuvuthwa kwemvelo) kudlulela kuleli phuzu, futhi.
Ukuze uqonde umehluko phakathi kwesayensi nokusetshenziswa komqondo lo mqondo, ake siqhathanise nomzimba womuntu ku-baseball ngomzuzu. Kusukela endaweni eqondile, i-baseball inesisindo esilinganayo futhi ijwayele yonke indawo, akunjalo? Ngakho, nganoma yikuphi ukuhamba kwebhola, leli phuzu lesisekelo lihamba ngqo nalo. Kulula.
Kodwa uma sicabangela isikhungo sedonsela phansi emzimbeni womuntu, izinto ziba nzima nakakhulu. Njengoba ngishilo ngaphambili ngoba umzimba unezingxenyana ezihambayo (izingalo, imilenze, ikhanda, izindawo ezihlukahlukene ze-trunk), njalo uma wenza, kahle, noma yini, ukuma kwefomu lakho lonke liguqukile. Futhi uma uthwala into efana ne-suitcase noma isikhwama sokudla noma uma ugqoka isikhwama , lokhu kunesisindo kwezinye izindawo, kodwa hhayi abanye, ukushintsha isikhungo sokuvuthwa kakhudlwana njengoba kwenza.
Ngakho-ke, singasho ukuthi isikhungo samandla adonsela phansi siyinto eguqukayo njalo emzimbeni omelela ukuthi isisindo (mass) somzimba wakho wonke silinganiselwe ngaso sonke isikhathi. Leli phuzu lingakwazi futhi lishintshe ngokusekelwe kulokho okuthwalayo nokuthi uyithwala kanjani, kanye nesimo osithathayo nokuhamba kwakho okwenzayo.
Ngithatha lokhu ngalokhu: Ngesimo esihle kakhulu ngithanda ukucabanga ngesikhungo sokuvuthwa njengendawo ongayisebenzisa ngayo umzimba wakho wonke njengeyunithi eyodwa, ngenkathi uqondisa ngomusa ukunyakaza kwama-appendages ngenkathi uhamba.