No carbs or an intake of 20 grams of carbs per day made my tummy flat without exercise and I was 47 at the time.

53 and post menopausal. Was always skinny until peri-menopause hit. In addition to general weight gain, also go the menopausal belly. Cardio and diet only helped so much. For the last 5 months I have been doing consistent weight training (just for reference, going through Caroline Girvan's different series) and have not only toned up and gained muscle all over, but has really reduced the lower belly and I have visible stomach muscles. I still have to try to eat a healthy diet and cut back on snacking (my weakness). I initially started weight lifted to increase bone density and will stay with it for that reason, but loving the side benefits.

^OP again

After reading the comments, I realize I should have framed this to ask “how do I get a firm stomach?”

My body has already become more toned and I have gained muscle and lost weight going to OTF. I am naturally very muscular and have no trouble gaining muscle quickly. I can tell the program has its limitations but I think I’ll be able to continue to get fit using this method, but I do think I need to be hyper-focused on diet. I’ve been doing the standard eating “healthy” and portion control and I think I need to be more focused on food groups and just restrict calories, honestly. I think I have to eat a lot less, and I already only eat around 1200-1300 calories a day.

Being a woman is so fun! Haha.