Cheetah goes barefoot from day 0. Chimps and gorillas do physical exercise from day 0. Resistance exercise can make your bones at least 50% more dense and, giv

Cheetah goes barefoot from day 0. Chimps and gorillas do physical exercise from day 0. Resistance exercise can make your bones at least 50% more dense and, given that single hip can withstand one metric ton of load, makes your bones more than adequate. If you go barefoot from day 0, you'd learn proper run technique from day 0. Or, if you have massive body like me, you have to learn proper run technique to just run. And you, just like me, will do that in one day. Having our posture to be very different from other animals, we have to have different muscle groups trained (thick meat). For example, the more upright position of animal, the more thick gluteus maximus is - for horse it is very small, for chimp it can be seen as just small and it is very thick for humans. So, as upright walking humans, we have to have different legs from all other animals. And different running technique.