5/29/2023 0 Comments Cosmed k5 price![]() Compared to Vyntus, at moderate intensity the K5 in B×B mode underestimated VO 2, VCO 2, and energy expenditure by 6.6, 6.9, and 6.6%, respectively. At rest and 60 W, there was good agreement between Vyntus and K5 (breath-by-breath, B×B) in VO 2, VCO 2, RER, and energy expenditure, while in Mix mode the K5 overestimated VO 2 by 13.4 and 5.8%, respectively. Vyntus measured the stoichiometric RQ of butane combustion with high accuracy (error <1.6%) and precision (CV <0.5%), at VO 2 values between 0.788 and 6.395 L/min. For the reliability study, 14 subjects were measured two times during prolonged walks (13 km, at 5 km/h), with the K5 set in mixing chamber (Mix) mode. For validation, measurements were consecutively performed tests with both devices at rest and during submaximal exercise (bicycling) at low (60 W) and moderate intensities (130–160 W) in 16 volunteers. ![]() ![]() The main aims of this study were to determine the accuracy of the portable metabolic cart K5 by comparison with a stationary metabolic cart (Vyntus CPX), to check on the validity of Vyntus CPX using a butane combustion test, and to assess the reliability of K5 during prolonged walks in the field.
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