Evaluation of Different Methods to Measure Muscle Mass and Strength in a Population With Class II/III Obesity

The US muscle measurement will be performed with the handheld portable Philips Lumify Sonography connected to a Samsung tablet. The measurement will take approximately 5-10 minutes. A seven-point measurement has to be performed based on the seven-site Jackson Pollock Generalized Prediction Equations for circumference and skinfold thickness measurements.6,7

The brand of the DXA scanner is the Hologic Discovery A, which has a weight limit of 204 kilograms. During the DXA scan, patients will be exposed to radiation, which is approximately 0.2 micro Sievert (µSv) for measuring body composition. For comparison: the average amount of background radiation per hour is approximately 0.23 µSv. The DXA body composition scan will be performed according to standard protocol by a specialized technician.