FITI/Gymnasium & Physical fitness/H??ng d?n t?p health and fitness center/Các bài t?p thon b?ng cho nh?ng ng??i m?i b?t ??uYour browser isn’t supported anymore. Update it to get the ideal YouTube experience and our hottest features. Learn more– Hít th? sâu b?ng b?ng và th? ra t? t? b?ng m?i, l?p l?i 15-twenty nh?p r?i th? nh? nhàng bình