I-Dumbbell luhlobo lwezixhobo ezincedisayo zokuphakamisa ubunzima kunye nokuzilolonga, ezisetyenziselwa ukwakha uqeqesho lokuqina kwemisipha. Ngenxa yokuba akukho sandi xa uqhelisela, kuthiwa yi-dumbbell.
Iidumbbells zizixhobo ezilula ezisetyenziselwa ukomeleza izihlunu. Izinto zayo eziphambili ziyintsimbi, ezinye zinerabha.
Isetyenziselwa ukuqeqeshwa kokuqina kwemisipha, ukuqeqeshwa kwentshukumo ye-muscle compound. Kwizigulane ezinamandla aphantsi kwemisipha ebangelwa ukukhubazeka kwentshukumo, intlungu kunye nokungasebenzi kwexesha elide, ubambe ii-dumbbells kwaye usebenzise ubunzima bee-dumbbells ukuze usebenzise ngokusebenzayo ngokuchasene nokuchasana nokuqeqesha amandla emisipha.
Iidumbbells ziqeqesha isihlunu esinye; Ukuba ubunzima bunyukile, ulungelelwaniso lwemisipha emininzi luyafuneka, kwaye lunokusetyenziswa njengolunye uhlobo loqeqesho lwentshukumo edityaniswe nezihlunu.
Uncedo lokuphakamisa iintsimbi kunye nemithambo yomzimba. Kukho iintlobo ezimbini zobunzima obumiselweyo kunye nobunzima obuhlengahlengiswayo. ① Iidumbbells zobunzima obuzinzileyo. Phosa ngentsimbi yehagu, intonga yentsimbi embindini, iziphelo zombini zebhola engqukuva eqinileyo, kuba akukho sandi ngexesha lokuziqhelanisa, ebizwa ngokuba yidumbbell. Ubunzima beedumbbells ezikhanyayo yi-6, 8, 12, kunye ne-16 yeeponti (1 iponti = 0.4536 kg). Ubunzima beedumbbells ezinzima ziyi-10, 15, 20, 25, 30 kg, njl njl. ② Iidumbbells ezilungisekayo. Ngokufana ne-barbell encitshisiweyo, kwibar yentsimbi emfutshane kuzo zombini iziphelo zobunzima bephepha lentsimbi elijikelezileyo, malunga ne-40 ~ 45 cm ubude, ukuphakamisa okanye ukuqina komzimba kunokunyusa okanye ukunciphisa ubunzima. Rhoqo ukwenza imithambo ye-dumbbell, inokomeleza ukomelela kwezihlunu zamalungu ahlukeneyo omzimba.
Kuyaziwa ukuba uhlalutyo lokuguquguquka kwamandla e-centrifugal kufuneka lwenziwe xa uvavanyo lwe-astronaut ngokomzimba lwenziwa. Amandla e-Centrifugal anokwenza into yokuqala enobunzima obuncinci ifumane amandla amaninzi e-kinetic ngaphezu kwesiqhelo ngomzuzwana, kwaye iqhubeke nokuvelisa inertia, ngoko ke amandla ombutho we-centrifugal akanakujongelwa phantsi. Ushishino lwezixhobo zokufaneleka luye lwazama ukufumana iindlela zokusebenzisa olu hlobo lwamandla e-kinetic ngokukhawuleza kuyilo lwemveliso. Phantsi kwalo mkhwa, i-dumbbell yamandla e-kinetic esanda kuphuhliswa yazalwa. Iqhekeza imvakalelo enzima yeedumbbells zemveli kwaye yenza umthambo onzima ukhululeke ngakumbi. Idibanisa iimpawu ezisebenzayo zebhola yesandla kunye ne-dumbbells ukubonelela ngoqeqesho oluphambili lwemisipha kunye nesiphumo somzimba wonke.
Ixesha lokuposa: Aug-05-2022