SURPRISED THIS WASN'T MOVED.
Empty stomach in the morning is BEST.
Post-workout is GOOD.
If you want to add BCAAs or anything for that matter...NOT prior to working out. This defeats the purpose of not having any reserves...even though digestion time is substantial and the nutrients won’t necessarily be available until later there are certain caveats to consider here especially in the wake of total ***letion. Don't worry about muscle sparing, catabolism won't set in prior to breakfast,

that's just funny!
Probably THE single most important factor to remember is the "Fat Burning Zone" as it can very easily be over or undershot. Both of these necessarily burn calories, but the former is for endurance while the latter is simply caloric. The Zone is
very specific, and if utilized properly coaxes your body to release reserves.
M.