Certain exercises tend to burn more amino acids when done while on a caloric deficit or low-carb diet.
Whoa! Which exercises?
Anything high intensity, typically. This is assuming a fairly heavy caloric deficit or very restricted carbs, though.
This is a new idea to me. Could you explain more, including how this was determined?
I've read this multiple places...
What do you believe the energy source is in high intensity exercise if glycogen/glucose is not readily available?
Anything beyond the lactic threshold won't use fat for energy, AFAIK.
This is the reason, even though it's kind brosciency, that bodybuilders tend to go low intensity on cardio the closer they get to competition - because as you get leaner and/or cut calorie/carb intake, oxidation of amino acids becomes more prevalent in general.
Doing something high intensity is going to increase gluconeogenesis when carbs aren't available...
Maybe I've misunderstood? You are the doctor, after all ^_^
OH - and I should clarify, I meant high intensity cardio - not weight training.
High intensity weight training is REQUIRED to maintain muscle (by intensity, I mean % of 1RM)