Humans have always found ways to magnify their strength.
Once upon a time, it was through teamwork.
Later it was through use of tools – particularly mechanical advantage. where you could amplify the strength of one person to do the job of an entire team.
Even later it was through specialization, where people who could use tools well were employed to use those tools, while others could do other things.
Even later it was through computers, where we could amplify our mental capabilities to do menial tasks in a trivial amount of time.
So the real answer is whether there is a limit to how we can amplify ourselves. I don’t think there is a limit to that.