Eccentric vs Concentric
Eccentric thiab Concentric yog ob lo lus uas feem ntau tsis meej pem ntawm lawv lub ntsiab lus thiab cov ntsiab lus. Ob lo lus muaj feem xyuam rau cov leeg nqaij. Lawv yog ob hom isotonic contraction. Thaum cov nqaij ntshiv kom txav ib qho load ces cov leeg mus concentric contraction.
A bicep curl yog ib qho piv txwv zoo tshaj plaws ntawm kev cog lus concentric. Thaum tuav ib qho hnyav dhau lawm, tus txiv neej yuav tsum khoov nws lub luj tshib yog li, ua rau qhov hu ua concentric contraction. Hauv lwm lo lus, concentric contraction yog txhua yam ntawm cov leeg nqaij. Lub forearm tau rub nrog qhov hnyav nyob rau hauv rooj plaub ntawm concentric contraction.
Lub biceps brach yuav txo nws txoj kev txav mus los thaum lub sij hawm ntawm concentric contraction. Kev siv cov leeg tsis zoo ua rau lwm hom isotonic contraction hu ua eccentric contraction. Hauv luv luv, nws tuaj yeem hais tau tias ob qho tib si concentric thiab eccentric hom leeg nqaij contraction yog sim thiab xyaum los ntawm tus lifter thaum lub sij hawm nws workouts ntawm lub gym thaum lub sij hawm tsim lub cev ce.
Li no, ob nqe lus no cuam tshuam nrog lub cev lub cev thiab nqa qhov hnyav. Yog hais tias cov leeg lengthens nyob rau hauv contraction nws npaum li cas rau eccentric contraction. Yog li ntawd, eccentric contraction yog raws nraim qhov opposite ntawm concentric contraction. Yog tias qhov hnyav dhau los tuav, tus neeg nqa lub cev xav tias nws pib poob qis. Qhov no ua rau eccentric contraction.
Nws yog ib qho tseem ceeb kom nco ntsoov tias brachialis thiab biceps pib cog lus sim tuav qhov hnyav ntxiv. Ntawm qhov tod tes, txawm hais tias cov biceps sim tuav qhov hnyav ntxiv, lawv tsis tuaj yeem tsim lub zog ntxiv los tuav qhov hnyav ntev, thiab yog li, lawv muab txoj hauv kev ua rau eccentric contraction. Cov no yog qhov sib txawv ntawm ob lo lus uas cuam tshuam nrog lub cev lub cev thiab kev nqa lub cev, uas yog, eccentric thiab concentric.
