I imagine that hunters that could carry large heavy loads of meat that they killed back to the cave/tribe would have been positively selected for since a least

I imagine that hunters that could carry large heavy loads of meat that they killed back to the cave/tribe would have been positively selected for since a least the invention of the spear. Spears are older than the human species at around a million years ago. Plenty of time to evolve very strong hominids.