Not necessarily,as it all depends in which adaptive state you are in to start with,and where you end up after stim. As any other stimulus,it may well help to keep you in a favorable adaptive state,or throw you way off it. As for each set of stimuli it is totally dependent on how it is incorporated in a training program.
I would not pick your back status as an indicator of such,as the improvement you are getting is solely due the momentarily increased feedback your brain is getting,and hence its response.The very same can be applied to your 200’s as well,although in that case a minimal neurological “gain” may contribute to your seemingly altered perception.