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Originally Posted by Bitman
OK, I spent a few seconds playing with this. Walking was mildly interesting, though my head doesn't tilt back far enough, and it hurts my wrists.
Galloping shows promise, but would need much more practice, and a decent amount of arm strength. And lots of stamina. Sucks being a computer nerd. Might be an interesting trick to learn, though.
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Yes, there are a couple "bipedalism" issues here. since we are evolved primarily for upright walking, the eyes are situated accordingly. in four legged animals the eyes are positioned where the top of our head would be. So most people do struggle with the head pulling back, which not only hurts the neck, but also robs strength of the arms and thrust from the legs. So to really feel it work better one needs to think of sending the top of the head forward as if you could see through the top of the head.
and since you havn't been doing this your whole life, your wrist bones aren't developed for that kind of weight or flexion. apes of course walk on knuckles, which you can see is preferable for the wrist angle, but again, one would have to develop a different kind of bone structure to support the weight there.
I am aware of a young girl of about 12 in my city who apparently has been running on all fours her whole life. She can and does walk upright when socially appropriate, she is not retarded or inbred. but for her own fun and preference, she just loves running on all four--she is apparently quite fast at it.