When a scientist is ahead of his times it is often through misunderstanding of current rather than intuition of future truth. In science there is never any error so gross that it won't one day from some perspective appear prophetic.
I think it's probably best to work out in the morning to get it out of the way. My ultimate top tip is to drag yourself even if you have to roll yourself out of your bed and in to a sit-up - it's really not that bad once you start.
