Lisalaura, if you're training intensely then you can handle the extra carbs from the bars (most likely) - just be aware they are there. The labels are misleading; if glycerine or sugar alcohols are listed then you know your carb count is higher than they claim.

Your lack of results with the strips is probably a function of the water and the lifting - I don't register on those strips every time either and I am still losing fat and still have the odd bout with keto breath

Nat