Keeping the "unbendable arms"
somehow keeping the "unbendable arms" is a tough task for me ... last nite during practice, my sensei told me to relax (my shoulders were kinda tense), so I relaxed but then when I was performing kata my arms were too "loose", i.e. they would compress like springs when I walked forwards ...
"you should 'lock' ur joints so your arms are like a pair of spear .." said my sensei.
now that puts a huge question mark above my head ... how can one keeps "unbendable arms" while being relaxed? are there any exercises that I can develope the "unbendable arms" ?
and my sensei talks about "extending" our arms ... my understanding of"extending" means using deltoid and triceps as a power source ... am I in the right track or totally off the mark?