Read the comfort zone first.
My wife and I just finished watching The Pharmacist on Netflix, which I highly recommend. It got me thinking about addiction. With comfort in mind, what is the difference between drug use and exercise?
If our comfort is a subjective experience, which we know it is, what does exercise do to it? Essentially exercise is pain. To exercise with any sort of effort causes pain. So if you compare the time you are exercising to the time you are not exercising, the time you are not exercising is more pleasurable.
In the same way, if you are on opiates, your experience is changed. Compared to your high, everything is more painful off drugs. So the baseline human experience when compared to drug impairment is pain.
So you see, these two devices could work in reverse ways. One induces pain to make the rest of the day more pleasurable. And the other induces pleasure to make the rest of the day more painful.
So what will you induce, pleasure or pain?