Youve probably heard about body mass index (BMI) but what about the fat-free mass index (FFMI)? This tool factors in more than your weight, and takes into account muscle mass and fat mass as well....

Youve probably heard about body mass index (BMI) but what about the fat-free mass index (FFMI)? This tool factors in more than your weight, and takes into account muscle mass and fat mass as well....

Original article and pictures take https://naturalphysiques.com site