I think we can. We have archeological records showing us what even the fittest people looked like and what clothes they wore. Modern equipment is so much better

I think we can. We have archeological records showing us what even the fittest people looked like and what clothes they wore. Modern equipment is so much better than what ancient people had access to, it’s just not even close. Better nutrition means people can get bigger/stronger more easily. Easier access to training equipment amplifies this. The access to information we have means even more people can train more optimally than people in the past possibly could. The sheer volume of people gives us statistical probability that genetic freaks will appear more frequently. All of these gives us more confidence that current records are “true” records.