Hellow guys, Welcome to my website, and you are watching 잘못된 계단 운동은 무릎 부상을 가져 올 수 있어요. 올바르게 계단을 오르내리는 운동 자세를 알려드립니다. │ 클래스e │ 뇌벨업. and this vIdeo is uploaded by EBSCulture (EBS 교양) at 2023-05-27T17:00:01-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.