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Roger Koo's Bag Workouts age 71 onwards.

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Roger Koo's KSD bag workouts at age 71 years onwards. Spent 42 years in martial arts. Please note, I have conditioned myself over the years to begin my bag workouts without any type of warm-ups, the use of wrist wrap or gloves in order to condition my knuckles and muscles to deliver high-impact actions. Founder of KSD - Koo Self Defense 1992 in Cartersville, GA 30120, USA 🇺🇸. Retired from Koo Self Defense on January 31, 2011 to focus on my other passion - I.T : Computer Repair, Web Design & SEO. Retired from Computer Business on my 71st birthday, December 31, 2024. Kurt Zettlemoyer, KSD Black Belt who sums up what Koo Self Defense is all about and includes sample videos of drills. https://zettlemoyerksd.tripod.com/index.html Roger Koo's martial arts history in Tae Kwon Do UKTA/ITF, Choi Kwang Do and Koo Self Defense is on web archive. https://web.archive.org/web/20120224223307/http://ksdi.net/masterkoo.html Roger Koo on cover of martial arts magazines: UK Fighters' Monthly February 1978 UKTA Demo in Hyde Park for Queen Elizabeth Silver Jubilee USA Tae Kwon Do Times March 1990 Cover Story UK Martial Arts Illustrated March 1990 Cover Story USA Tae Kwon Times May 1992 with Master James Lim https://www.ma-mags.com/srchmag.php?SrchFor=roger+koo&SrchHow=all&Search=Search From July 23, 2025, Roger Koo's workouts videos is on YouTube. https://www.youtube.com/@RogerKoo2025

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