Comparison Of Withings Bodycardio To Gold Standard Measurements Of Pulse-Wave Velocity And Body Compositon

General Wellness Products (GWP) are widely used by consumers, human physiology scientists, and healthcare practitioners. However, current research on GWP accuracy is limited and often reports large inaccuracies. Purpose: The purpose of this study was to assess the Withings BodyCardio for accuracy in the measurement of body composition and arterial health when compared against gold standard laboratory measurements. Methods: Healthy, young males (N=10) and females (N=10) were assessed for measures of body composition and pulse-wave velocity (PWV) in a randomized order utilizing air displacement plethysmography (BodPod), applanation tonometry (SphygmoCor), and the Withings BodyCardio. Measures of body composition and PWV were compared with criterion measures using the Bland-Altman analysis and mean absolute percent error (MAPE). Results: Data is reported as Bias (95% Confidence Interval). The BodyCardio overestimated PWV by 0.68 m/s (-0.16, 1.51) and fat mass by 2.91 kg (-2.91, 8.73). BodyCardio PWV and fat mass estimations had a MAPE of 9.7% and 25.8%, respectively. The BodyCardio underestimated body mass and fat-free mass by 0.11 kg (-0.41, 0.18) and 2.87 kg (-9.04, 3.30), respectively. BodyCardio body mass and fat-free mass estimations had a MAPE of 0.15% and 5.6%, respectively. Discussion: The Withings BodyCardio should be used cautiously for measures of fat mass and fat-free mass, although it provides accurate measures of body mass and PWV

Withings Body Cardio Versus Gold Standards of Pulse-Wave Velocity and Body Composition

Home blood pressure monitors are widely used by consumers yet cardiovascular health may be better defined by pulse-wave velocity (PWV). So far, the Withings Body Cardio scale is the only consumer device that has been designed to measure PWV and body composition, including fat mass (FM) and fat-free mass (FFM), in the home setting. While one study has demonstrated that this device meets the acceptable accuracy standards of the ARTERY Society, no study has accounted for the gravitational effect of standing on a scale on aortic-leg PWV. Purpose: The purpose of this study was to assess the accuracy of PWV and body composition as determined by the Body Cardio scale. Methods: Measurements of PWV and body composition in healthy, young males and females (n = 20) using the Body Cardio device were compared to PWV assessed by applanation tonometry (SphygmoCor) and body composition analysis determined by air displacement plethysmography (Bod Pod). Bland–Altman analysis and mean absolute percent error (MAPE) were used to assess accuracy. Results: Data are reported as the mean bias (95% confidence interval). The Body Cardio overestimated PWV by 0.68 m/s (−0.16, 1.51) and FM by 2.91 kg (−2.91, 8.73). Body Cardio PWV and FM estimations had a MAPE of 9.7% and 25.8%, respectively. The Body Cardio underestimated body mass (BM) and FFM by 0.11 kg (−0.41, 0.18) and 2.87 kg (−9.04, 3.30), respectively. Body Cardio BM and FFM estimations had a MAPE of 0.15% and 5.6%, respectively. Conclusions: The Body Cardio scale provides accurate measures of BM and PWV; however, it should be used cautiously for measures of FM and FFM

Second-order competences and Schumpeterian rents

The commentaries to our focal article were both interesting and stimulating. As we generally agreed with the major points raised in the commentaries, we use this response to frame an on-going tension point or challenge regarding team definitions, highlight a few unifying themes that weave through our initial article and the commentaries, and discuss the transition from research to informed practice. The past few decades have been exciting times for team researchers and practitioners, and the time is ripe for new energies and approaches. © 2012 Society for Industrial and Organizational Psychology