Description

Roger Koo's KSD bag workouts at age 71 years onwards. Spent 42 years in martial arts. 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