MariposasMacros (Macronutrients)
Macronutrients, almost always shortened to macros, are the three categories of nutrients that supply calories: protein, carbohydrates, and fat. Protein and carbs each deliver 4 calories per gram, while fat delivers 9 calories per gram. In a training context, tracking macros goes a step further than simply counting total calories because the ratio of each macro shapes how your body uses the food you eat. High protein intake supports muscle repair after hard sessions; carbohydrates replenish glycogen that fuels repeated efforts; dietary fat supports hormone production and helps absorb fat-soluble vitamins. The part many people miss is that the right macro split is not universal. A powerlifter eating for strength will likely run a very different protein-to-carb ratio than a marathoner fueling long aerobic miles, and both of those differ from someone in a fat-loss phase who is trying to preserve muscle while keeping total calories down.
Example
A strength trainee weighing 180 pounds tracks their daily food and finds they are hitting 2,400 calories but only 110 grams of protein. After adjusting their meals to push protein closer to 175 grams while keeping total calories the same, they pull carbs and fat down slightly to compensate. Within several weeks they notice better muscle retention during the cut, which is exactly the outcome that calorie tracking alone would not have predicted.