Good video, I've wondered if 6 packs/strong abs were very useful other than the aesthetics. It's an odd muscle, biceps/shoulders/chest can be used to lift or push weight but the core is just "there" and I don't think we should lift weights with our stomach... If crunches and situps are inefficient, I naturally want to know more efficient ways of doing it!

I guess the wire analogy was meant to convey that if we bend our core a lot and it's not very strong then there's 'power leakage' and there's inefficient energy transfer through the body, I hadn't thought about it that way before