Presuming future technology where we could control the nervous system mechanically, could a person be made to workout (e.g. weightlift) while asleep and awake fully rested? Obviously, using the same technology, you would disable the brain’s ability to sense that they were moving and making a ruccus and so on, so that sleep could be maintained.
Bumping before it goes off the first page…
I would suspect that the two things (exercise and sleep) are mutually exclusive. If sleep is the time when your body repairs itself (as I understand it, in my non-scientific way) and exercise is an activity that creates damage needing repair (again, I don’t have a scientific understanding of how this works, but the conventional wisdom is that muscles fibers are torn during exercise and rebuilt stronger during periods of rest), I don’t see how one could occur simultaneous with the other. If you workout during sleep, how would you be rested once it’s over?
As to your second question, aren’t you talking about sleepwalking, in which people do sleep during periods of physical activity? I believe that is possible, but, again, I don’t think it would leave you rested and refreshed.
Highly unlikely. In normal sleep, voluntary motion is disabled. When that mechanism fails, you get sleepwalking behavior, which tends to be a bit less focused than exercise requires. Stimulating a sleeping person to the point where they do exercise would likely wake them up.
Via increased blood flow or adrenaline or such?