I usually try to pass guard but today thought today I 'd try starting from the bottom a few times while rolling. Every time they'd just grab my legs and move them out of the way and come around. I am unsure what the legs are actually doing. Am I actually meant to apply any pressure against my opponent with them ? I was under the impression I shouldn't be using strength at all during bjj and only technique. However I keep getting smashed. I find it hard to stop someone moving my legs out of the way without using any strength. The same with grips, I never grip tight and use strength to hold an opponent rather just relax and don't use any strength, again I just get smashed. How can I stop the opponent moving my guard without using any strength ?