A consideration of intrinsic strength
Hey, This is a bit of a martial arts kind of post so if you're into that kinda thing welcome aboard. Anyway, about intrinsic strength, and, by proxy, power. Consider that power actually never DOES come from tensing muscles, at least when hitting. I don't think it ever did. Where power comes from is a mixture of movement and the mass behind the movement. So inherently tensing the muscles doesn't generate more power. Inherently, learning to move the body mass as one whole piece so that all the mass in your body is behind it, and the ability to move is where this power comes from. And what do you know. Body alignments, things like the knee heel and toe, hips and shoulders, hands and feet, etc. are points that connect this whole body. Having those be alive while moving and not segmented will keep the body whole full in one piece and behind every movement it seems. Generating more power. They may seem like "merely body" but genuinely having this occur as an experience is extremely powerful, and not just little "points" and "things to remember" but actually powerful experiences. I think the ability to really BE in this body, so to speak, is the real key that makes a difference here. Surprisingly, there is a lot that is dead or unalive and not "moving from" in our minds and bodies. We might not even fully realize the depth we are lacking if it's all we've ever known. I think the tension, or "frozen pieces," things we don't want to feel or acknowledge is what stops us from feeling this body more deeply. Letting go. We have to fully be willing to let go and drop these attitudes to really feel and liven the body, and then when we can feel and really BE from the body, then it seems more natural that we begin to feel and become conscious of these postural issues and breaks in our bodily integrity. Then we can learn to move and learn and be from this more whole body sense. Anyway, have fun!