Raws li qee tus neeg ua si lub cev, qhov no yog lub tshuab zoo tshaj plaws rau kev nce cov leeg nqaij. Tib lub sijhawm, lub simulator no nto moo rau nws txoj kev nyab xeeb. Thaum lub sijhawm cob qhia, tus neeg ncaws pob yuav muaj peev xwm kho lub barbell ntawm txhua qhov siab nrog me ntsis tig tes. Cov leeg nqaij twg tuaj yeem ua haujlwm tawm thiab nce ntxiv ntawm cov simulators no? Cov khoom siv cob qhia lub zog yog qhov xav tau los txhim kho kev nplij siab ntawm cov leeg thiab ua rau lawv cov leeg nqaij loj hlob. Lawv tuaj yeem thaiv, ntawm cov hnyav dawb lossis nyob rau hauv lawv tus kheej qhov hnyav.
Cov tshuab hnyav pub dawb zoo tshaj plaws nyob rau ntawm thaj chaw ciam teb ze ntawm cov txee rau khaws cov dumbbells, cov hnyav thiab cov disks. Txhawm rau teeb tsa qhov hnyav xav tau, cov neeg siv khoom ntawm lub tsev yuav tsis tas yuav mus deb rau qhov hnyav.
Tsis deb ntawm cov khoom hnyav dawb kuj muaj cov tshuab tawm dag zog uas muaj lawv qhov hnyav. Cov neeg ncaws pob nyiam siv cov khoom hnyav (discs thiab dumbbells) thaum ua hyper extensions lossis abs.