Grug take rock lift many times everyday to protect tribe <|endoftext|> Every human was easily 2/3/4/5 during grug age (there used to be less difference in strength between men and women). When we hit agricultural age our diet went to shit but most men could probably still do 1/2/3/4 up until 1950s because of manual labor. Now we have access to as good diet as grug humans but physical activity level for most is so low they develop very little muscle mass. <|endoftext|> 