*gasp* Robotics? bad for your health? I refuse to accept that as an answer.
As others have already said in this thread, it's not Robotics in and of itself that is bad for your health, but how you respond to robotics that can be unhealthy. If you choose to let robotics problems cause you worry 24/7, if you decide to live build season in the workshop, surviving only on junkfood and maybe 15 min sleep a night, then sure, your health will go down.
but if you instead choose to think about the stuff your robot does well, actually go outside once in a while and have healthier food, and get a few hours of sleep a night, then your health shouldn't decline (well, at least not from your involvement with robotics).