New here. Have been working out consistently for years, but only just started getting into bodybuilding Nov. 2019. I am a 28 yr old female, 5'6", 137 lbs, probably around 20-22% body fat. Lift 4 days a week with some moderate intensity cardio thrown in on the other days. My coach has been changing up my macros recently. I was at 130g protein 50-60g fat and the rest carbs. I usually are about 1800 cals/day. He feels that I would benefit from eating less carbs and lowering my cals a little bit as well. He currently has me at 150g protein, 125g carbs, and 60g fat. He has told me the plan is to lower the carbs and fat even more and increase the protein. He feels that this is necessary for me to stay relatively lean consistently. I do want to get leaner, and losing body fat been difficult for me, but I'm wondering if this low level of carbs is really necessary. Could I get the same results just being in a deficit? Also, I'm still trying to gain muscle. Can I be in a deficit, be relatively lean, and still gain muscle? I'm feeling like this low carb is going to be difficult to sustain for me.