Does your site explain how to calculate ones own sleep cycle? I couldn't find it, and it's a simple trick I learned from a teacher many years ago. Just choose

Does your site explain how to calculate ones own sleep cycle? I couldn't find it, and it's a simple trick I learned from a teacher many years ago. Just choose an evening where you wait until you're feeling sleepy but don't go to bed, start a timer, stay up and after 20 minutes or so you'll start becoming less sleepy. It might help to do something like watching a video program or playing a game. After a while you'll start getting sleepy again, hit the timer. That's a rough estimate of your cycle. Because everyone is different.