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When you’re just getting started, it can feel like you need a physiology degree to understand what’s going on in your body. It’s important to track progress, but some metrics are downright useless - like BMI. I’ll teach you why you should forget about it, and 4 critical fat loss stats to focus on instead. What is BMI?   BMI (Body Mass Index) basically tells you how big or small you are for your height. (And most of the time, that information isn’t news to you.) It comes from this simple equation comparing your weight to your height.   photo credit: Wikipedia That number is then compared to a reference chart of many, many, many people, and you’re put into a category (underweight, normal, overweight, obese, etc.) photo credit: Wikipedia Why is it used?   1. It’s a quick and easy way to estimate the average person’s body fat. This is because gaining weight usually means getting fatter. Losing weight usually means losing fat (and some muscle unless you’re following an intelligently designed body recomposition program like this one). Unfortunately, it doesn’t take into account age, sex, or LITERALLY the most important factor in obesity - how much FAT you actually carry on your body. 2. It saves time and money for research scientists. Inviting 5,000 people to do anything costs time and mon-ey. So when you’re conducting large-scale research, why call everyone in individually to do an expensive body-composition analysis when you can just email them asking for their height and weight? Much easier. Besides, their individual body composition doesn’t matter. Unless the research is on a unique population like bodybuilders, BMI already does a decent job of estimating the average. If they’re they’re muscular enough to throw off the BMI scale, then they’re not the average. Their data point simply gets washed out as an irrelevant outlier. 3. The medical world doesn’t like change. That’s why...