Bounceback

Our bodies are made up of a series of systems all of which are dependant on each other. Our digestive system won't be optimal if our endocrine system is under par and vice versa.
Same with our respiratory system. If our breathing is fast and shallow, our digestion is sluggish. And so on and so on.
The Vagus nerve is king pin of the parasympathetic nervous system - our rest and digest system. Our breath impacts this nerve and in turn the release of hormones required for the myriad of functions in our bodies. The release of GLP-1 is stimulated by the Vagus nerve, blood sugar levels are impacted in turn.
Breathe slow, relax and be mindful at meal times. Increased cortisol levels from chronic stress will impair GLP-1 release.
Our emotional state at mealtimes is as important as what we consume in living a healthy life.

"One conscious breath in and out is meditation" Ticht Nhat Hanh...

You don't have a sleep problem, you have a state problem. Most of us are trying to fall asleep with a body that is still on high alert. We have full, fast days and then expect our systems to suddenly soften as soon as our head hits the pillow. But the body doesn't work like that. Breath is the transition it needs as a signal that it is safe to let go. 'tsleep