Quote (BeastOf_TheEast @ Apr 9 2013 04:48pm)
when losing weight, how do u tell if its water or fat? its hard for me to tell, my weight always fluctuates and i think its because of water weight. also, when in a deficit, when does ur body actually use muscle for fuel? how much of a deficit usually causes muscle loss?
Body fat calipers. Measure body fat every 2 weeks and it will reveal the truth.
However, you can't lose JUST water. You will lost both water AND fat.
When in a deficit, your body does not use muscle as fuel....I'm not sure where you heard that, but it's bogus.
Muscle loss comes from extreme deficits and/or fasting with intense muscular activity with not enough protein/amino acids to repair the torn muscle fibers.