What happened to the joy of recreational sport (‘I spent a week crying. Why do so many fitness fans end up needing surgery?, 3 August)? PBs, how many laps, lengths, miles? Malcolm RiversIsleworth, LondonYour daily Country Diary column is always informative, but I encourage readers to join the game it offers. I cover up the name of its author before reading the column and then guess whether it was written by a man or a woman.