title: Validity and reliability of cardiorespiratory measurements recorded by the LifeShirt during exercise tests.
abstract: The LifeShirt is a novel ambulatory monitoring system that records cardiorespiratory measurements outside the laboratory. Validity and reliability of cardiorespiratory measurements recorded by the LifeShirt were assessed and two methods of calibrating the LifeShirt were compared. Participants performed an incremental treadmill test and a constant work rate test (65% peak oxygen uptake) on four occasions (>48 h apart) and wore the LifeShirt, COSMED system and Polar Sport Tester simultaneously. The LifeShirt was calibrated using two methods: comparison to a spirometer; and 800 ml fixed-volume bag. Ventilation, respiratory rate, expiratory time and heart rate recorded by the LifeShirt were compared to measurements recorded by laboratory equipment. Sixteen adults participated (6M:10 F); mean (SD) age 23.1 (2.9) years. Agreement between the LifeShirt and laboratory equipment was acceptable. Agreement for ventilation was improved by calibrating the LifeShirt using a spirometer. Reliability was similar for the LifeShirt and the laboratory equipment. This study suggests that the LifeShirt provides a valid and reliable method of ambulatory monitoring.
authors.affiliation: Health and Rehabilitation Sciences Research Institute, University of Ulster, Jordanstown, BT37 0QB, UK. kent-l@email.ulster.ac.uk
authors.forename: Lisa
authors.initials: L
authors.lastname: Kent
authors.forename: Brenda
authors.initials: B
authors.lastname: O'Neill
authors.forename: Gareth
authors.initials: G
authors.lastname: Davison
authors.forename: Alan
authors.initials: A
authors.lastname: Nevill
authors.forename: J Stuart
authors.initials: JS
authors.lastname: Elborn
authors.forename: Judy M
authors.initials: JM
authors.lastname: Bradley
mesh_terms: D000293:Adolescent; D000328:Adult; D002138:Calibration; D015444:Exercise / Q000502:physiology*; D045853:Exhalation / Q000502:physiology; D006334:Heart Function Tests / Q000295:instrumentation*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D010992:Plethysmography, Impedance; D012123:Pulmonary Ventilation / Q000502:physiology; D012129:Respiratory Function Tests / Q000295:instrumentation*; D055815:Young Adult