Also, you will probably need a goal. Aimlessly training just to stay 'fit' doesn't generate that much motivation. For example, my goal is to get bigger (build

Also, you will probably need a goal. Aimlessly training just to stay 'fit' doesn't generate that much motivation. For example, my goal is to get bigger (build up more muscles & get stronger) - and I can monitor my progress - which generates motivation ("oh today I was able to do this exercise with more weight then the last time!")