Perhaps poster, Brenton can . He has done a lot of research.
I hear complaints from clients, who come to me from out of town, that they can’t convince their Electrologist to do longer than an hour or two. That is too bad, but you have to keep in mind that it can be uncomfortable to sit and do microsurgery on hair follicles for hour upon hour.
I do marathon sessions routinely, but I set a timer. Every 90 minutes to two hours, the client and I take a break to move and do other business before we commence on the next two hour block.
If the practitioner doesn’t have a great ergonomic set up, marathon sessions will just “kill” you!
Mike Bono does marathons, but he picks and chooses what he is interested in doing, depending on how much time he has.
So you have Brenton and Mike to ask, two great resources, indeed.
One question, are any areas appropriate for laser reduction?