Want to feel more content less grumpy and get a good night's sleep? Swimming could be the answer says a new study. The study conducted by members of British Gas SwimBritain a series of fun team swimming relays that take place across Britain every September found that taking a regular dip at your local pool can make you feel happier as well as healthier with participants reporting an increase of 35 percent in positivity during a four week study. (Read: 7 simple tips for a good night's sleep) The results have also shown that the low impact sport is a