Still struggling to get going. Gonna try and do a minimum of 5km a day just to get the hang of it again.
I found these two videos interesting. They both answer the same question. Where does the fat go?
A shorter jokey one
https://youtu.be/C8ialLlcdcw
A longer more scientific one
https://youtu.be/vuIlsN32WaE
The secret is to breath guys.