Sorry you have such tiring and unpleasant experience concerning your health, I'm happy you are getting more better compared to years back. Like you have said steemit itself is actually exercise in disguise because you will have to stay awake for many an anxious hours staring at the screen though could not be compare to physical training anyway for those who are able body.

To come up with the motivation to get back in shape?

Getting heal first as soon as possible would make this feeling fade away gradually, spending more time trying to get over your sorrows by engaging in activities that take your time more, just like steemit. Life is vanity, vanity upon vanity, we are not always completed when it comes to our needs in life, I'm surely one will be lacking in one area or the others.