I am coming to terms with the fact that I am my mind and my body is mine...like a way to convey my thoughts in the physical world. Typically being outside is distracting. I also eat less when I am active.
Not sure which mechanisms as acting in which way. There is heightened awareness,fat burning, muscle response...just my opinion.
With long term fasting is alittle different. There are studies that talk about increased autophagy(recycling damaged cells). There are also articles that talk about what it does for rebooting your immune system and digestive systems. It encourages your body to start burning keytones, so burning fat for fuel.
I am not sure I am the person the explain the science...but I can be the handsome beard that experiences it haba.