Trial reportPloS one2019
Accuracy of the Cosmed K5 portable calorimeter.
Trial report in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
32 citing papers in PubMed.
- Effectiveness of a Remote Physical Activity Intervention in Individuals with Alzheimer's Disease and their Caregivers: Results from a Randomized Trial.Medicine and science in sports and exercise · 2026Trial
- The metabolic effects of habitual leg shaking: A randomized crossover trial.Journal of diabetes · 2024Trial
- Lactate accumulation rate is associated with lactate turnpoints in cyclists and triathletes: a comparison of vLapeak and vLamaxEuropean journal of applied physiology · 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
- The energetic cost of human standing balance and gait initiation over a range of natural postures.PLoS computational biology · 2026Article
- Exercise-Induced modulation of molecular-enriched functional connectivity in Parkinson's disease.Journal of Parkinson's disease · 2026Article
- Resting Oxygen Consumption Estimates in Scleroderma Can Lead to Underestimation of Cardiac Output.Pulmonary circulation · 2026Article
- Training modality-specific differences in body composition, resting metabolic rate, diet, and gut microbial signatures in elite endurance and strength athletes.Frontiers in nutrition · 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
- Technological and Biological Reliability, and Validity of Five Different CPET Systems During Simulated and Human Exercise.Scandinavian journal of medicine & science in sports · 2026Article
- Rotationplasty performed in adults versus minors: a comparative study of long-term quality of life, functional and biomechanical outcomes.Journal of bone oncology · 2025Article
- Prosthetic rehabilitation for bilateral transfemoral amputees using microprocessor-controlled knees with a novel training program: A study of two cases.The Journal of international medical research · 2025Article
- The adaptation of the GameSquad exergaming intervention for young adults with Down syndrome: A pilot feasibility study.Disability and health journal · 2025Article
- Vision-based multimodal energy expenditure estimation for aerobic exercise in adults.Frontiers in physiology · 2025Article
- ENERGY expenditure of COmmuting to school (ENERGYCO): protocol for a cluster randomized controlled trial.Frontiers in public health · 2025Article
- Comparison of two portable metabolic systems for measuring energy expenditure at rest and during exercise in untrained women.Frontiers in physiology · 2025Article
- Energy expenditure and enjoyment of instructor-led exercise videos for children ages 7-13.PloS one · 2025Article
- Sum of Skinfold-Corrected Girths Correlates with Resting Energy Expenditure: Development of the NRGNutrients · 2024Article
- Human-exoskeleton interaction portrait.Journal of neuroengineering and rehabilitation · 2024Article
- A CNN Model for Physical Activity Recognition and Energy Expenditure Estimation from an Eyeglass-Mounted Wearable Sensor.Sensors (Basel, Switzerland) · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe purpose of this study was to assess the accuracy of the Cosmed K5 portable metabolic system dynamic mixing chamber (MC) and breath-by-breath (BxB) modes against the criterion Douglas bag (DB) method.
methodsFifteen participants (mean age±SD, 30.6±7.4 yrs) had their metabolic variables measured at rest and during cycling at 50, 100, 150, 200, and 250W. During each stage, participants were connected to the first respiratory gas collection method (randomized) for the first four minutes to reach steady state, followed by 3-min (or 5-min for DB) collection periods for the resting condition, and 2-min collection periods for all cycling intensities. Collection periods for the second and third methods were preceded by a washout of 1-3 min. Repeated measures ANOVAs were used to compare metabolic variables measured by each method, for seated rest and each cycling work rate.
resultsFor ventilation (VE) and oxygen uptake (VO2), the K5 MC and BxB modes were within 2.1 l/min (VE) and 0.08 l/min (VO2) of the DB (p≥0.05). Compared to DB values, carbon dioxide production (VCO2) was significantly underestimated by the K5 BxB mode at work rates ≥150W by 0.12-0.31 l/min (p<0.05). K5 MC and BxB respiratory exchange ratio values were significantly lower than DB at cycling work rates ≥100W by 0.03-0.08 (p<0.05).
conclusionCompared to the DB method, the K5 MC and BxB modes are acceptable for measuring VE and VO2 across a wide range of cycling intensities. Both K5 modes provided comparable values to each other.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.