| Body metric (suggestion for display name on app) | API/SDK variable name (partial) and/or formula | Included in Prism’s Example App? | User-friendly description | Precision examples | Units |
|---|---|---|---|---|---|
| Body Fat % | bodyfat_percentage and defaults to the tina_fit method | Yes | The percentage of your body that is fat. One of the top predictors of long-term health, lifespan, metabolism and athletic performance. Improve your body fat percentage by losing fat, building muscle or both. | 23.7 | % |
| Lean Mass % | lean_mass_percetage = 100 - bodyfat_percentage | ||||
| Yes | Your non-fat or muscle percentage (also including water, bone, etc.). | 76.3 | % | ||
| Weight | weight_as_kg | Weight as inputted by the user. | 167 | kg | |
| Fat Mass | fat_mass = bodyfat_percentage x weight_as_kg | Yes | Decreasing fat mass is associated with improved health, lifespan and athletic performance. However, it is not as strong of an indicator as body fat % because body fat % incorporates both fat and lean mass. | 39.6 | lbs |
| Lean Mass | lean_mass = lean_mass_percentage x weight_as_kg | Yes | Your non-fat or muscle mass (also including water, bone, etc.). More lean mass is associated with better health, lifespan, metabolism and athletic performance. | 127.4 | lbs |
| Waist-To-Hip % | waistToHipRatio = waist_fit / hips_fit | Yes | The waist-to-hip ratio (WHR) is a measure used to assess fat distribution around your waist, hips, and buttocks and assess if it’s putting your health at risk. |
Health Risk* Women Men Low 0.80 or lower 0.95 or lower Moderate 0.81-0.85 0.96-1.0 High 0.86 or higher 1.0 or higher Sources: WHO Circumference and Waist-Hip Ratio, Geneva, 2008 | 0.97 | n/a | | Neck | Neck_fit | Yes | Circumference measurement of the neck. | 16.1 | in | | Shoulders | Shoulder_fit | Yes | Circumference measurement of the shoulders at their widest location. | 43.2 | in | | Upper Chest | Upper_chest_fit | Yes | Circumference measurement of the upper chest at its widest location. | 44.2 | in | | Chest | Chest_fit | Yes | Circumference measurement of the chest close to the sternum. | 42.4 | in | | Waist | Waist_fit | Yes | Circumference measurement of the high waist just above the belly button. | 38.6 | in | | Low Waist | Stomach_fit | No | Circumference measurement of the waist at its widest location, typically at around or below the belly button. | 39.8 | in | | Hips | Hips_fit | Yes | Circumference measurement of the hips that goes around the buttocks, typically on the top of the hip bone. | 39.3 | in | | Left Bicep | Mid_arm_left_fit | Yes | Circumference measurement of the left biceps muscle at its widest location, typically mid-arm. | 13.8 | in | | Right Bicep | Mid_arm_right_fit | Yes | Circumference measurement of the right biceps muscle at its widest location, typically mid-arm. | 13.7 | in | | Left Thigh | Thigh_left_fit | Yes | Circumference measurement of the left thigh at its widest location, typically mid-thigh. | 18.1 | in | | Right Thigh | Thigh_right_fit | Yes | Circumference measurement of the right thigh at its widest location, typically mid-thigh. | 17.8 | in | | Lower Left Thigh | Lower_thigh_left_fit | No | Circumference measurement of the left lower thigh, typically just above the knee. | 18.1 | in | | Lower Right Thigh | Lower_thigh_right_fit | No | Circumference measurement of the right lower thigh, typically just above the knee. | 17.8 | in | | Left Calf | Calf_left_fit | Yes | Circumference measurement of the left lower leg, typically around the calf muscles at their widest location. | 16.4 | in | | Right Calf | Calf_right_fit | Yes | Circumference measurement of the right lower leg, typically around the calf muscles at their widest location. | 16.3 | in |