| Body metric (suggestion for display name on app) | API/SDK variable name (partial) and/or formula | User-friendly description | Precision examples | Units | |
|---|---|---|---|---|---|
| Body Fat % | bodyfat_percentage and defaults to the tina_fit method | 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 | ||||
| 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 | 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 | 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 | |
| Visceral Fat %* | vat_percentage | The percetange of fat stored around your internal organs. | 5.4 | % | |
| Visceral Fat Mass* | vat_mass | Your visceral fat mass in pounds. Reducing it improves overall health and longevity. Higher visceral fat is linked to increased risks of metabolic diseases, heart conditions, and inflammation. | 20.0 | lbs | |
| Basal Metabolic Rate | bmr | Basal Metabolic Rate (BMR) represents the number of calories your body requires to maintain essential physiological functions while at rest, such as breathing, blood circulation, and cell production. It accounts for approximately 60% to 75% of daily calorie expenditure. Understanding your BMR can aid in tailoring diet and activity levels for effective weight management and overall health | 1900 | kcal | |
| Body Roundness Index (BRI)* | bri | The BRI is a metric that estimates body fat and visceral adipose tissue by modeling the human body as an ellipse. It utilizes waist circumference and height measurements to provide a more accurate assessment of body fat distribution compared to traditional indices like Body Mass Index (BMI). | 5.0 | n/a | |
| BMI* | bmi | Body Mass Index (BMI) is a simple measurement that estimates body fat based on height and weight. It has been commonly used to assess whether a person is underweight, normal weight, overweight, or obese, however recent showcases that it should not be used as a metric of health when used on its own. | 20.0 | n/a | |
| Predicted BMI | bmi_predicted | This is a prediction of the BMI based on the scan of the user and not on what the user types in as height and weight. | |||
| BMI Confidence Score* | bmi_confidence | This confidence score indicates how reliable the calculated BMI is based on the user's inputted weight and height. It is determined by comparing the calculated BMI to the predicted BMI derived from the user's actual body shape in the scan. | 0.95 | n/a | |
| Waist-To-Hip ratio | waistToHipRatio = waist_fit / hips_fit | 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 | | | Waist-to-Height ratio | waistToHeightRatio = waist_fit / height | Your waist size relative to your height. A lower ratio is linked to better metabolic health and lower risk of obesity-related diseases. Keeping your waist less than half your height is a good target. | 0.49 | n/a | | | Neck | Neck_fit | Circumference measurement of the neck. | 16.1 | in | | | Shoulders | Shoulder_fit | Circumference measurement of the shoulders at their widest location. | 43.2 | in | | | Upper Chest | Upper_chest_fit | Circumference measurement of the upper chest at its widest location. | 44.2 | in | | | Chest | Chest_fit | Circumference measurement of the chest close to the sternum. | 42.4 | in | | | Waist | Waist_fit | Circumference measurement of the high waist just above the belly button. | 38.6 | in | | | Low Waist | Stomach_fit | Circumference measurement of the waist at its widest location, typically at around or below the belly button. | 39.8 | in | | | Hips | Hips_fit | Circumference measurement of the hips that goes around the buttocks, typically on the top of the hip bone. | 39.3 | in | | | Left Mid Arm | Mid_arm_left_fit | Circumference measurement of the left arm at its mid-point, between the shoulder and the elbow. | 13.8 | in | | | Right Mid Arm | Mid_arm_right_fit | Circumference measurement of the right arm at its mid-point, between the shoulder and the elbow. | 13.7 | in | | | Left Forearm | Forearm_left_fit | Circumference measurement of the left forearm at its mid-point, between the elbow and the wrist. | 11.1 | in | | | Right Forearm | Forearm_right_fit | Circumference measurement of the right forearm at its mid-point, between the elbow and the wrist. | 11.1 | in | | | Left Wrist | Wrist_left | Circumference measurement of the left wrist. | 3.1 | in | | | Right Wrist | Wrist_right | Circumference measurement of the right wrist. | 3.1 | in | | | Left Thigh | Thigh_left_fit | Circumference measurement of the left thigh at its widest location, typically mid-thigh. | 18.1 | in | | | Right Thigh | Thigh_right_fit | Circumference measurement of the right thigh at its widest location, typically mid-thigh. | 17.8 | in | | | Lower Left Thigh | Lower_thigh_left_fit | Circumference measurement of the left lower thigh, typically just above the knee. | 18.1 | in | | | Lower Right Thigh | Lower_thigh_right_fit | Circumference measurement of the right lower thigh, typically just above the knee. | 17.8 | in | | | Left Calf | Calf_left_fit | Circumference measurement of the left lower leg, typically around the calf muscles at their widest location. | 16.4 | in | | | Right Calf | Calf_right_fit | Circumference measurement of the right lower leg, typically around the calf muscles at their widest location. | 16.3 | in | |