Comment by amanaplanacanal
3 days ago
When I was younger I used to visit a local zendo, and I think the meditation sessions were 40 minutes. It's definitely an experience. Very easy to fall asleep without external distractions. The idea was to just learn to concentrate on bodily sensations, skin, breathing, sound.
I have tried sensory deprivation tanks a few times and always fall asleep within 5 min, like clockwork.