Hellow guys, Welcome to my website, and you are watching 생존을 위한 '근육테크'의 시대. 60대가 되면 매년 15%씩 감소하는 근육. 근육의 감소는 건강을 위협하는 원인이 된다! (KBS_ 20180516). and this vIdeo is uploaded by KBS 생로병사의 비밀 at 2021-05-11T02:00:18-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.