If It Fits Your Macros, or IIFYM as the “fitness crowd” calls it is relatively new as a meme, formerly known as “flexible dieting” but the dietary principles have actually been around for quite some time in the fitness
IIFYM, or flexible dieting, is a method of dieting that revolves around meeting daily macro
nutritional intake targets, and not on what you eat to get there.
It’s essentially a form of calorie counting (a gram of protein and carbohydrate both contain about 4 calories, and a gram of fat contains about 9).
Tracking Your Macros