Bill “superfoot” Wallace retired in the early eighties as undefeated world champion in the middle weight of full contact kickboxing: his combat strategy was always based on fantastic kicking techniques that often caught by surprise his opponents and knock them out. Wallace was not just good and superfast in kicking but he could shoot double of triple kicks with a single leg, using these techniques in the same way most boxers faint punching techniques.
Apart from his obviously amazing experience as a martial artist Wallace has a master in Sport Science that further qualifies him to advise people about stretching for flexibility. He was a true precursor of innovative stretching excercises and applications like the one decribed in the video below.
It shows here how to improve flexibility for side kicks (and it equally applies to round and hook ones): good news is that we at CARISMA regularly do a very similar (simplified) version during our classes, so it’s good to learn the extra movements we can add.