I've tried it once and it just didn't feel right. It didn't feel like I'm working, it felt more like staying in bed while sick. Also, my back started hurting af

I've tried it once and it just didn't feel right. It didn't feel like I'm working, it felt more like staying in bed while sick. Also, my back started hurting after a few hours. I can't imagine someone doing it for more than a few days.