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Dinesh ^club

Many telltale adaptations that the human genus evolved for running function to stabilize the body. Running is essentially jumping from one leg to the other, making it much less stable gait than walking; ….. Although injuries like sprained ankles are problems today, they were potential death sentences on the savanna 2 million years ago. Thus ever since H. erectus we have benefited from a series of novel features, from head to toe, that help us keep from falling while running. None is more prominent than the gluteus maximus, the largest muscle in the human body. This enormous muscle is barely active during walking but toppling forward with every step. (You can test this yourself by walking and running while grasping your buttocks: feel how much more intensely the muscle clenches with every step when running.) Apes have a small gluteus maximus, and we can tell from fossil hop bones that the muscle was relatively modest in australopiths and first because enlarged in H. erectus. Big butt muscles also help these activities as much if not more than H. erectus, the muscle’s expansion probably was primarily for long-distance running. ~ Page 86

Apes typically walk less than 3 kilometers (2 miles) a day, but humans are prodigious long-distance walkers. One extreme human George Meegan, recently trudged all the way from the South America to the northernmost part of Alaska,
www.italoeuropeo.com/interviews/1241-interview-to-george-meegan-the-longest-walka-britishman-long-distance-walker averaging 13 kilometers (8 miles) per day. Although Meegan’s trek was unusual, his mean daily distance was actually within the range of how far modern hunter-gatherers walk when they forage (females average 9 kilometers [5.6 miles per day] and males average 15 kilometers [9.3 miles]) Since H. erectus adults were about the size of most modern human hunter-gatherers, needed the same number of calories and lived in similar habitats, they too, must have walked comparable distance on a daily basis in hot, open conditions and find enough food. As you might expect, this legacy of trekking is stamped in a series of adaptations throughout the human body that originated in early Homo and that helped to make the human genus even better at long-distance walking than the australopiths. ~ Page 80

11 years ago. Edited 16 months ago.

LotharW ^club

HFF Dinesh und ein schönes Wochenende!

16 months ago.

ColRam

HFF Dinesh et bon weekend ensoleillé

16 months ago.

Bergfex ^club

Unfortunately, the human skin has not kept up with the development of the gluteus maximus: www.ipernity.com/doc/bergfex/44257848
HFF and a nice weekend!

16 months ago.