So I was in class and the instructor commented that flexibility is very important for jiu jitsu, and theres guys that will kill you with it, and you should try to improve it. Makes sense I thought. Then I thought about it in relation to strength. Strength and flexibilty are both physical attributes that can be increased through working on them. Why then is flexibility seen in a positiive light, while strength is looked down on in grappling? You always hear about guys like BJ Penn and their amazing flexibility to stuff takedowns and how its so great, and he's got awesome grappling. But as soon as Matt Hughes or Sean Sherk out power someone there technique is poor and its seen in a negative light. How is it wrong to power out of an armbar. Yet its seen as a positive if you use your freaky flexibility to regain gaurd when the guy has almost passed, and would've passed save for you being able to bend your knee to your chest and get a foot in. So why is using flexibility good? and using strength bad?