ArticlePloS one2018
Validity, reliability and minimum detectable change of COSMED K5 portable gas exchange system in breath-by-breath mode.
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.
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Who cites it
58 citing papers in PubMed.
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- The metabolic effects of habitual leg shaking: A randomized crossover trial.Journal of diabetes · 2024Trial
- Investigating effects of FFP2 wearing during physical activity on gas exchange, metabolism and affective state using a randomized controlled trial.Scientific reports · 2024Trial
- Effects of inspiratory muscle training on respiratory muscle strength, respiratory function and functional capacity in adolescents with idiopathic scoliosis : A randomized, controlled trial.Wiener klinische Wochenschrift · 2023Trial
- Accuracy of the Cosmed K5 portable calorimeter.PloS one · 2019Trial
- Locomotion-specific metabolic demands in 30-s anaerobic efforts.Journal of exercise science and fitness · 2026Article
- Effect of repetition tempo on cardiovascular and metabolic stress when training to muscle failure during lower body exercise.European journal of applied physiology · 2026Article
- Determination of cut-off points for the Move4 accelerometer and assessment of energy expenditure in children and adolescents aged 6-16 years using manual wheelchairs: a validation and calibration study.Journal of neuroengineering and rehabilitation · 2026Article
- The energetic cost of human standing balance and gait initiation over a range of natural postures.PLoS computational biology · 2026Article
- Validity and reliability of the K5 wearable metabolic system during high-intensity treadmill testing in healthy, young adults.Proceedings (Baylor University. Medical Center) · 2026Article
- Overnight wakefulness impairs next-day postprandial glucose in young women independent of sex hormones.The Journal of clinical endocrinology and metabolism · 2026Article
- In-Field Validity and Inter-Unit Variability of Metabolic Carts During Simulated Exercise.Scandinavian journal of medicine & science in sports · 2026Article
- Method-dependent differences in VO₂ peak determination and their implications for percentage-based exercise prescription in elite rowers.BMC sports science, medicine & rehabilitation · 2026Article
- Portable hip exoskeleton improves walking economy for stroke survivors.Nature communications · 2026Article
- Exercise intensity influences variability and test-retest reliability of pulmonary gas-exchange measurements during constant work-rate cycling.Frontiers in sports and active living · 2026Article
- Article
- Technological and Biological Reliability, and Validity of Five Different CPET Systems During Simulated and Human Exercise.Scandinavian journal of medicine & science in sports · 2026Article
- Pilot evaluation of a dance-based physical activity program for adults with Down syndrome.Translational journal of the American College of Sports Medicine · 2026Article
- Assessing the Validity and Reliability of the PNOE¯ for Measuring Cardiometabolic Outcomes During Walking Exercise.Journal of functional morphology and kinesiology · 2025Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThis study aimed to examine the validity, reliability and minimum detectable change (MDC) of the Cosmed K5 in breath by breath (BxB) mode, against VacuMed metabolic simulator. Intra and inter-units reliability was also assessed.
methodsFourteen metabolic rates (from 0.9 to 4 L.min-1) were reproduced by a VacuMed system and pulmonary ventilation (VE), oxygen consumption (VO2) and carbon dioxide production (VCO2) were measured by two different K5 units. Validity was assessed by ordinary least products (OLP) regression analysis, Bland-Altman plots, intraclass correlation coefficients (ICC), mean percentage differences, technical errors (TE) and MDC for VE, VO2, and VCO2. Intra- and inter-K5 reliability was evaluated by absolute percentage differences between measurements (MAPE), ICCs, TE, and MDC.
resultsValidity analysis from OLP regression data and Bland- Altman plots indicated high agreement between K5 and simulator. ICC values were excellent for all variables (>0.99). Mean percentage differences in VE (-0.50%, p = 0.11), VO2 (-0.04%, p = 0.80), and VCO2 (-1.03%, p = 0.09) showed no significant bias. The technical error (TE) ranged from 0.73% to 1.34% (VE and VCO2 respectively). MDC were lower than 4% (VE = 2.0%, VO2 = 3.8%, VCO2 = 3.7%). The intra and inter K5 reliability assessment reveled excellent ICCs (>0.99), MAPE <2% (no significant differences between trials), TE < or around 1%, MDC <or around 3%.
conclusionsK5 in BxB mode is a valid and reliable system for metabolic measurements. This is the first study assessing the MDC accounting only for technical variability reporting intra- and inter-units MDCs <3.3%.
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