It's funny but I have been doing OMAD diet for around 4 weeks now.
Needed to shed some belly fat and have lost quite abit of excess weight around the belly.
In regards to muscle loss, I don't seem to has lost much. Have been eating one high protein meal a day, and maybe one little snack.
Been lifting consistently throughout, heavier weights.
Also cardio wise, no intense running, just walk in the treadmill.
I may need to slightly increase my calories now, as I want to gain some more muscle mass considering I have lost the belly.
However my concern is, the belly will come back soon as I up the calories.
I don't think I can sustain one meal a day long term, the heavier I lift, the more my body is starving for calories.
I think I need to be realistic, at age 47 it's highly unlikely I can sustain a flat stomach at all times lol