I do the things I do because I want them, not because I need them. I’m lazy that way. So to answer your question ... When life throws me a curveball, I make it a dream and a goal to get back into whatever I missed out on. I keep myself immersed in my activity even though I am not actively participating. I will even go as far as to schedule in time for planning what I am going to do when I get back in the flow. I have done this before and it really works.
As an example, I used to build musclecars. I don’t right now due to a lack of time and space. That will change sometime in the not too distant future. When I can, I am going to build up an early ‘90s Corvette. I know everything that will go into it from the powertrain right down to the colors of the trim. Even now I am deafened by the engine’s rumble, blinded by the mile deep paint and can smell the leather interior. It is a dream and a goal. It will happen. Maybe not tomorrow, but very soon.
Perhaps, one’s desire to stay moving and fit through an injury or other inconvenience could become the next goal. Write it down and plan for it. Stay active even if only mentally. Call it “Virtual Momentum”. Become passionate about it and getting back in the saddle will not only be easier, but gratifying as well. Remember your reasons for doing it in the first place.
This also works if you lose your passion, but are still able to be active. Immerse yourself in it. Rediscover the reasons why you want it. You know what lights your fire. Seduce yourself with it.
Works for me.