It's probably just an issue with athleticism. Balance and flexibility also increase greatly with strength training. I have been strength training 3x/week for 8

It's probably just an issue with athleticism. Balance and flexibility also increase greatly with strength training. I have been strength training 3x/week for 8 years now. Before that I don't think I could have done this, heck I don't think I could have squatted 95lbs. These days I can hold a squat like that nearly permanently, plus lots of other things you wouldn't expect from strength training like it's much easier for me to fall and than prevent myself from hitting the ground by re-balancing myself if I skip on ice or something like that. Build might mess up the physics a bit, but I'd guess 99.99% of humans in good physical condition can do this.