Weight, body fat and lean mass

The measures

• Weight is what any scale gives you.
• Body fat is the share of your weight that's fat, as a percentage.
• Lean body mass is everything else: muscle, bone, organs and water.
• BMI is weight divided by height squared. It says nothing about fat versus muscle.

Smart scales estimate body fat and lean mass by passing a tiny current through your feet. The estimate moves with how much water you hold, so day-to-day numbers jump about.

Weighing well

• Same time each day, ideally in the morning after the bathroom and before eating or drinking.
• Barefoot, with dry feet, on a hard floor.
• Look at the weekly trend, not a single day.

In Soma

Weight, body fat, lean mass and BMI are in Longevity > Body. Lean mass sits at the top, since keeping muscle matters as you age. Weigh yourself in Track if you don't have a smart scale. Smart scales and blood pressure cuffs shows how to connect one.