Originally Posted by
LouaiB
I think a better way to experiment is to up more than just 5 minutes. 5 minutes might be too small of a time, and the variables occurring could be stronger than the difference 5 minutes would cause. You should try 10 min wbtb, 1 hour wbtb, etc. To narrow it down properly.
If you already did that and found out you range on around 30 min, then I don't think you need too woody too much about 5 minutes of difference, especially that as you do more of your wbtbs, you'll start sensing when it's a proper time to get back to sleep. For example, I know my wbtbs are long (like an hour long) but I don't worry about it too much. I can feel when I'm ready, and it happens to be around 1 hour. Don't get me wrong, you should know if you need long or short wbtbs, but you don't need to be so specific. You can't anyways, night to night variables make the proper wbtb duration vary (not vary much, you'll still be in your average range most of the times). With practice you'll get a proper sense.