I think the confusion here is about ketosis and fat burning. If you are in ketosis then you are burning fat incompletely and producing ketones. If your not in ketosis that does not mean that you are not burning fat. It's all the same fat... just used completely in the Krebs cycle (fat burning/ATP/energy producing pathway) or not. Your workout will have no effect on this. It will just speed up whichever fat burning process you are in.

Your question is difficult to answer without me knowing what you know about the causes of ketosis and fat metabolism. But anyway, as far as fat burning... it's all the same fat and the same process, workout or not. The workout will just make it happen at a faster rate because you need the energy at that time.

I hope this helps...?