The word YET can add an extra thought to your sentence. It can be used more or less the same way that BUT is.
For example......... I normally only play tennis as a sport and yet I'm attracted to golf and plan to try it soon.
Vera's 'yet' doesn't really work, although I understand what you are trying to say.
May I comment of the use of athletic in line 3,
The man has an athletic build OR he is athletically built. It is a tiny point but your English is of such a high standard that you are down to perfecting the details.
Well done.
My other languages are Afrikaans (fairly competent) yes it is an offshoot from Dutch, and Zulu which I enjoy speaking to our local people in Kwa Zulu Natal. They encourage me and make me brave though I know I am not fluent.
Keep on writing, you are doing so well.