OK...........just my personal opinion here.

DS16 absolutely mad about sports.

DD18 is the complete opposite. Has always hated sport, it holds no interest for her. I certainly tried to encourage her when she was younger to participate in extracurricular sport but it was always met with a very audible gasp and a firm "no way am I going to play _________". She was more than happy with the amount of sport and PE she received at school and that was that.

Personally I didn't see the big deal if she didn't want to play sport and as far as I am concerned it's not the be all and end all. She had enough exercise without organised sport, she rode her bike, went to the park, kicked a soccer ball with her brother, went to the pool day after day in summer and on it goes. She didn't need sport to teach her how to be a team player, how to socialise or how to be a gracious winner or loser. Her interests lay elsewhere so I encouraged her to pursue those instead. Eventually, when she was old enough, she went out and got a part time job and then came home and told me. As far as I can ascertain no sport has had no ill effects at all and she presents as a very confident, independent and well rounded young lady.