Female professional looking for mid week room

I am a professional who will be starting a new job in North Oxford in mid June. I currently live in Watford with my husband. I am looking for a room to rent mid week to cut down on my commuting time. My main interests are keeping fit including weight training, cycling, swimming (pool and open water) and tennis. I also enjoy cooking and reading. I am not particularly bothered what gender I live but people with similar interests would be nice. Happy with pets.