Fit 4 Life Keep fit Classes "Fit 4 Life" gives thousands of us the opportunity to get together in a spirit of fun and friendship to exercise regularly together. Through keep fit classes, we have successfully changed the lives of so many people by introducing them to fitness through movement and dance, resulting in more energetic, healthier and happier people all round.Young or young at heart, male or female, join a Fit 4 Life class and discover how to have safe, effective exercise and make new friends.