Our test is carried out using a DEXA scan, the gold standard for body fat composition. We employed MeasureUp to take the scans of our 15 CHOICE volunteers (eight males and seven females). It measures a whole swathe of body composition details, ranging from body fat to bone density. We then measure each trialist on each of the body fat scales and compare the results.
Our tester records how accurately the scales measure weight, using calibrated 20kg and 100kg weights. If the scale measures the exact weight it gets 100%. If it's out by 0.1kg - 90%, out by 0.2kg - 80%, out by 0.3kg - 70%, out by 0.4kg - 60%, out by 0.5kg - 50%, out by 0.6kg - 40%, out by 1kg or more - 30%.
We assess how easy it is to set up the scale with user data. We also assess how easy it is to read the display and how long the measurement stays displayed as well as subsequent use (measuring body fat and weight) and foot placement/stability.
Does the scale show daily calories required to maintain your basal metabolic rate (BMR)? BMR is the energy required by the body at complete rest to maintain basic functions. If the scale displays AMR (active metabolic rate) this is the energy required by the body in its active state.