I have seen people carrying heavy load on their head especially in 3rd world countries, does carrying on head any benefit or harm, which muscle get strengthen in doing it?
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$\begingroup$ Not really an answer, but an interesting related article: slate.com/articles/news_and_politics/explainer/2010/08/… $\endgroup$– rotaredomNov 23, 2017 at 14:49
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