45 years old and taking Taekwondo with my 22 yr old daughter. We love the sport and love competing in events, been at it since Feb and we both have our Orange belt and I have over 8 trophies from competitions. I have the power and she has the finesse. 5 board break with knife hand, no problem, 3 board turning side kick no problem. Anyway my flexibility on my spinning hook kicks can reach over 6 feet and I'm 5 11. However my roundhouse kicks can barely reach hip level? I stretch every day for 15-20 minutes but when I actually perform the kick my hip pops and its painful? Any advice?