Hellow guys, Welcome to my website, and you are watching 일자목 거북목인 당신을 위한 스트레칭! 따라만하세요~ 목이 시원해지는 영상 with 서울대 정선근 교수. and this vIdeo is uploaded by YTN 사이언스 at 2019-12-18T22:18:22-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.