I accelerated up to 52 km / h on my bike, so running over 65 km / h is very difficult even for 45 km / h, it will already be a fantastic result. understandable
The intelligentsia is shit! take and practice here is the answer to your question about the maximum speed of a person. How champions run, this is the maximum speed of a person!
If you throw a person onto a black hole, then in theory he should reach the speed of light. Well, or something like that. You formulate the questions there more precisely. :)
Up to 60-65 kilometers per hour, but this is only in theory, but in practice, a person can probably no more than 50-55 kilometers per hour, and then for a very short time.
If we take into account a professional runner who accelerated to the maximum at a short distance, it is 44 km / h.
This speed was developed not even in theory, but in practice (at competitions), but it cannot be maintained for a long time, and no one has yet managed to develop even greater speed. And it will probably not be possible, unless you "supplement" your body, but this will already be cyborgization.
In theory - up to 65 km / h. This conclusion was made by scientists from Dallas, USA. The border of 65 km / h, which they established, is due to physiological reasons, that is, the very structure of the human musculoskeletal system. Faster is no longer possible. At the same time, the real maximum speed of a person is 44.72 km / h (Usain Bolt's record at 100 meters). There is room for development :)