Cov leeg mob Eccentric yog ib qhov ntev ntawm cov leeg thaum cog lus. Nws yog ib qho kev quab yuam lossis yog hauv qhov fab ntxeev ntawm qhov kev ua uas cuam tshuam cov leeg. Yog tias koj muaj caj npab benteps curl thiab ncaj koj txhais caj npab los ntawm curl txoj hauj lwm, lub zog yog eccentric. Thaum koj curl koj sab caj npab, txoj kev txav yog concentric, uas txhais tau hais tias lub sij hawm luv luv nyob hauv contraction ntawm lub hom phiaj ntawm cov nqaij, qhov no cov pob txha.
Kuj Paub Raws li: Kev kawm tsis zoo, kev ua haujlwm tsis zoo. Cov leeg ua rau lub zog txav ntawm lub zog los ntawm kev nyob ntev thaum nyob hauv tsheb. Lub zog no yog tso tawm los ntawm kev ywj pheej thiab tshav kub, raising lub cev kub.
Eccentric nqaij contraction yog thawj coj hu ua excentric (los ntawm Erling Asmussen rau xyoo 1953), txhais tau tias tawm ntawm qhov chaw ntawm cov leeg. Qhov no hloov mus ua eccentric.
Piv txwv ntawm Eccentric Contractions nyob rau hauv Exercise
- Txos ib nyhav thaum lub caij curl
- Downward txoj kev sib tw khawm
- Downward tsab ntawv tsa suab ntawm lub laub tawm
- Txo lub cev thaum lub sij hawm ib nyuag los yog yob
- Txo lub cev thaum rub tu
Vim li cas thiaj ua Eccentric phaus kev kawm?
Qee qhov kev cob qhia cov nyom qhia hais tias kev qhia txog kev ua haujlwm ntawm eccentric tuaj yeem pab tsim kom muaj zog loj thiab muaj zog ntawm kev sib tw los ntawm kev sib thooj sib nrauj-eccentric taw. Kev pom zoo rau qhov no yog tias qhov kev sib koom tes ntawm eccentric yog muaj zog dua concentric contraction, uas tso cai rau koj nkag mus rau qhov hnyav hnyav zog.
Yuav kom ua tiav qhov no, koj yuav tsum tau ntiav ib tug neeg pab los yog neeg xauj los pab nrog qhov concentric ib sab ntawm lub tshuab nqa, thiab tom qab ntawd koj ua qhov chaw eccentric ib leeg.
Thaum lub sij hawm siv eccentric contraction siv zog tsawg dua thiab yuav tsum tau noj haus tsawg dua li ntawm qhov kev sib cog lus, kev siv eccentric ntau ntxiv yuav txhawb zog so zog.
Cov kws tshawb nrhiav tau pom 9% ntawm kev noj cov tshuaj metabolism hauv peb hnub tom qab ua haujlwm thoob plaws lub cev ua haujlwm. Qhov no yuav yog vim cov nqaij mob coj los ntawm kev ua haujlwm zoo li no.
Kev xyaum Eccentric feem ntau siv kho thiab kho lub cev. Rehabilitation tom qab sab hauv cov pob khaus lig (ACL) puas siv eccentric qoj ib ce. Eccentric ce muaj peev xwm pom zoo rau cov neeg laus los tsim kom muaj zog thaum uas tsis yog ntsig txog lub plawv thiab lub ntsws. Eccentric strengthening yuav siv tau los ntawm kev cia siab txo txoj kev pheej hmoo ntawm cov pob txha thiab cov tawv nqaij nyuj.
Eccentric Tseem Ceeb Kev Kawm
Hauv qhov kev hloov ntawm kev kawm ua haujlwm, lub ntsiab ntawm qhov kev ua tiav yog ua tiav nrog kev ua haujlwm ib-thib ob, xws li nqa ib qhov hnyav hauv ib lub biceps curl rau ib pliag. Tom qab ntawd, qhov kev tshem tawm tawm tau ntev li peb rau tsib vib nas this los muab ntau tshaj qhov tseem ceeb rau txoj kev tawm mus los. Piv txwv, maj mam txo cov biceps curl li peb mus rau tsib feeb.
Ncua Teeb Nqaij Nqaij Hlav nrog Eccentric Exercise
Mob nqaij ntshiv tom qab qhov kev ua hauj lwm yuav nce nrog ntau dua ntawm kev ua hauj lwm eccentric. Kev tshawb nrhiav tseem ua rau qhov no ua rau. Eccentric ce yuav ncab thiab lim tau cov neeg ua haujlwm, ua rau cov ntaub ntawv tsis muaj ntaub ntawv cog lus thiab tsis muaj kev cuam tshuam cov ntaub so ntswg thiab tso tawm cov calcium ions hauv kev nruj nrab.
Cov kws tshawb fawb thiab cov kws qoj ib ce tsis nco qab txog qhov tshwm sim rov qab ua dua: kev ua yeeb yam eccentric yuav ua rau qeeb nqaij pib mob qeeb , tab sis ho rov qab ua dua qhov qoj ib lim piam tom qab ua rau mob tsawg dua.
Qhov chaw:
Hackney, KJ, Lus Askiv, HJ., & Gretebeck, RJ. "So lub zog siv zog thiab qeeb-pib mob nqaij mob tom qab tag nrho lub cev ua haujlwm kev cob qhia nrog ib qho chaw eccentric." Cov Ntawv Tshaj Tawm Ntawm Lub Zog thiab Kev Ntsuam Xyuas Kev Tshawb Fawb, Xyoo 2008; 22 (5), 1602-1609.
Herzog, W., Leonard TR, Joumaa V, Mehta A. "Mysteries ntawm cov nqaij contraction." Phau Ntawv Teev Lus Siv Biomechanics, 2008 FEB 24, 1-13.
Hortobágyi, T., Hill JP, Houmard JA, Fraser DD, Lambert NJ, Ua Ixayees RG .. "Cov lus teb rau cov leeg mus ntev thiab luv hauv tib neeg." Phau Ntawv Teev Tsab Ntawv Tso Tawm, 1996 Mar; 80 (3), 765-72.
Pettitt, R..W., Symons DJ, Eisenman PA, Taylor JE, Dawb AT. "Cov kab mob rov ua eccentric ntev ntawm cov leeg ntev ntev qhia txog cov nqaij nyuab siab dua." Cov Ntawv Tshaj Tawm Ntawm Lub Zog thiab Kev Ntsuam Xyuas Kev Tshawb Fawb, 2005 Nov; 19 (4), 918-24.