It doesn't look particularly comfy... being suspended though there must something in it, many years ago I did a charity event where we got disabled and less physically able people into trees it was quite a challenge but what amazed me is the comments of how they enjoyed it and their pains melted away once in the trees...
Myself have suffered from all kinds of muscular skeletal disorders yet it all melts away once in the canopy...
Although I never hang around long enough for suspension trauma to kick in.
Anyway digressing now.