Training for strength and flexibility is a must. You must use it to support your techniques. Techniques alone are no good if you don't support them with strength and flexibility.
Bruce LeeI hope martial artists are more interested in the root of martial arts and not the different decorative branches, flowers or leaves. It is futile to argue as to which leaf, which design of branches, or which attractive flower you like; when you understand the root, you understand all its blossoming.
Bruce Lee