Why Body Fat Percentage Matters
Most people rely on the scale or BMI (Body Mass Index) to track their health, but these metrics are flawed. They don't distinguish between fat mass and muscle mass. You could be technically "overweight" on a BMI scale but possess an elite, athletic body fat percentage due to high muscle mass.
Tracking your body fat percentage tells you exactly what your body is made of, making it the most reliable metric for true health and fitness progress.
How does the US Navy Method work?
The United States Navy developed a mathematical formula to estimate body fat percentage using simple circumference measurements. It requires only a soft measuring tape and is considered one of the most accurate accessible methods outside of expensive DEXA scans.
For Men: It compares the circumference of your waist to your neck, relative to your height.
For Women: It accounts for the hips as well, as women naturally carry essential fat in different distribution patterns.
How to Measure Accurately
- ✓Neck: Measure just below the larynx (Adam's apple). Keep the tape flat but not uncomfortably tight.
- ✓Waist: Measure at the navel (belly button) for men, and at the narrowest point of the abdomen for women. Exhale naturally before reading the tape.
- ✓Hips (Women only): Measure at the widest point of the hips/glutes.
Lowering Your Body Fat
To decrease body fat, you must be in a consistent caloric deficit while consuming enough protein to preserve muscle mass. This is often tedious to track manually.
Dietly automates this entire process. Instead of manually weighing food and scanning barcodes, our AI agent recognizes your meals from a photo and logs your macros instantly, ensuring you stay in the perfect fat-loss zone effortlessly.