I'm not sure what you might mean by a "normal human".
I used to be a back-of-the-front-of-the-pack triathlete, with a previous history as an ultramarathon and touring cyclist. In my best shape (probably aged around 46), I was training on a flat loop course with some younger very strong but not professional cyclists where we would generally pull the group at 28mph for about between 20-60 seconds at a time.
I appreciate that there's a distance between that sort of thing and an "average person", but it's not a whole lot larger than the distance between the people who were in the group and, say, professional tour cyclists.
I used to be a back-of-the-front-of-the-pack triathlete, with a previous history as an ultramarathon and touring cyclist. In my best shape (probably aged around 46), I was training on a flat loop course with some younger very strong but not professional cyclists where we would generally pull the group at 28mph for about between 20-60 seconds at a time.
I appreciate that there's a distance between that sort of thing and an "average person", but it's not a whole lot larger than the distance between the people who were in the group and, say, professional tour cyclists.