To check body fat accuracy, we compared the results with those obtained from a DXA (Dual-Energy X-ray Absorptiometry) scan, a machine that accurately determines body fat composition. DXA scans were undertaken at the University of Otago, Wellington, Centre for Translational Physiology.

Readings were taken from six men and six women. The men, aged from 24 to 52 years, had DXA body fat scores of 21 to 34.9 percent. The women, aged from 24 to 65 years, had DXA body fat scores of 25.2 to 38 percent.

To assess weight accuracy, a technician used calibrated 20kg and 100kg weights. Weight sensitivity measures how sensitive the scales are by adding 100g weights.

We didn’t give models an ease of use score. Although some scales are cumbersome to set up for multiple users, once they’re up and running the models are easy to use. There’s two parts to ease of use: setting the scale up for the first time and then using it to get a reading.