Stair workout: 5 ce ua kom cov pob tw khov kho hauv tsev (siv ...
Txhawm rau khov kho cov pob tw hauv tsev, txawm tias tsuas yog ib theem (lossis chav hauv lub tsev me) yog qhov txaus. Ntawm no yog 5 ce ua thiab muaj pes tsawg lub sij hawm los qhia ...