Genetically, evolution takes tens of thousands of years, not hundreds.
Unless you secretly introduce it into the human population with minor changes here and there, ergo violating the Genetic Engineering bands.
Obviously the traits can't be enhanced TOO MUCH, or people will suspect something, but gradual change, just enough to be measurable, but not enough for society to notice it.
Over the span of a few hundred years, people's average standard for Speed, Reflex, Strength, Endurance will go up on a societal wide scale.
So let's give a example of enhanced human.
Let's take a supremely fit and trained martial artist / actress like Gina Carano.
Here in the 21st century she is considerably above your average human female in physical stats.
But many male atheletes of today are considerably stronger, faster, etc.
But imagine in the 24th/25th/26th century, same body, same training, similar size muscle mass and body shape, but she can have the strength of "In his Prime John Cena", reflex speeds of "In his Prime Jackie Chan", and the running speed of "In his Prime Usain Bolt".
Those would be HUGE physical stat boosts compared to where she is now.
Of course you still have to exercise and physically train to get to that point, but the upper limit is now higher because of genetic engineering.
What you can accomplish is greater than a 21st century stock human being.