This them introduces a whole new concept to Windows 10. There is no denying that in the past, we had a love affair with themes that were purely aesthetic. The introduction of more functional themes such as the Fitness Girl Theme is sure to set you on the right mood for the day. This Windows 10 theme comes in various images depending on the position taken by the fitness girl. Whatever you choose, you can look up to it as a constant reminder of the need to keep fit and stay healthy.