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2013 | 14 | 1 | 82-86

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Effects of Body Movement on the Reliability of a Portable Gas Analysis System


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Purpose. The purpose of this investigation was to determine the effect of body movement on the ability of a portable telemetric gas analysis device, the Cosmed K4b2, to produce a reliable measure of walking oxygen consumption (VO2). Methods. Thirteen adults were asked to report to a laboratory for three test sessions. During Session 1, participants were familiarized with the data collection procedures and completed a 15-min treadmill accommodation. In Sessions 2 and 3, each participant completed four 5-min treadmill walking trials at 1.8 m · sec-1 under different experimental conditions while VO2 was collected using the portable system. The four conditions were used to manipulate the portable metabolic system to mimic different types of movement. Results. Data analysis revealed no significant differences (p = 0.070) amongst VO2 values across all four experimental conditions during Sessions 2 and 3. Between-day coefficients of variation for the mean VO2 values of the four conditions ranged from 2.7% to 3.8%, with the highest level of variation occurring whilst the unit was strapped to the participant’s chest. Conclusions. Viewed collectively, the Cosmed K4b2 may produce reliable measures of VO2 in adult participants during treadmill walking who exhibit little vertical oscillation. However, future research is necessary to determine if the K4b2 is a valid instrument for collecting VO2 data if excessive body movement in the vertical direction can affect the data collection instrumentation.











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1 - 03 - 2013
24 - 04 - 2013


  • 113 Pucillo Gymnasium, Department of Wellness and Sport Sciences, Millersville University, Millersville, PA 17551, USA


  • 1. Brehm M.-A., Harlaar J., Groepenhof H., Validation of the portable VmaxST system for oxygen-uptake measurement. Gait Posture, 2004, 20 (1), 67-73, doi: 10.1016/S0966-6362(03)00097-3.[Crossref]
  • 2. Eisenmann J.C., Brisko N., Shadrick D., Welsh S., Comparative analysis of the Cosmed Quark b2 and the K4b2 gas analysis systems during submaximal exercise. J SportsMed Phys Fitness, 2003, 43 (2), 150-155.
  • 3. Lucia A., Fleck S.J., Gotshall R.W., Kearney J.T., Validity and reliability of the Cosmed K2 instrument. Int J SportsMed, 1993, 14 (7), 380-386, doi: 10.1055/s-2007-1021196.[Crossref]
  • 4. Maiolo C., Melchiorri G., Iacopino L., Masala S., De Lorenzo A., Physical activity energy expenditure measured using a portable telemetric device in comparison with a mass spectrometer. Br J Sports Med, 2003, 37 (5), 445-447, doi:10.1136/bjsm.37.5.445.[Crossref][PubMed]
  • 5. Hausswirth C., Bigard A.X., Le Chevalier J.M., The Cosmed K4 telemetry system as an accurate device for oxygen uptake measurements during exercise. Int J SportsMed, 1997, 18 (6), 449-453, doi: 10.1055/s-2007-972662.[Crossref]
  • 6. McLaughlin J.E., King G.A., Howley E.T., Bassett Jr D.R., Ainsworth B.E., Validation of the Cosmed K4b2 portable metabolic system. Int J Sports Med, 2001, 22 (4), 280-284, doi: 10.1055/s-2001-13816.[WoS][Crossref]
  • 7. Duffield R., Dawson B., Pinnington H.C., Wong P., Accuracy and reliability of a Cosmed K4b2 portable gas analysis system. J Sci Med Sport, 2004, 7 (1), 11-22, doi: 10.1016/ S1440-2440(04)80039-2[Crossref][PubMed]
  • 8. Corry I.S., Duffy C.M., Cosgrave A.P, Graham H.K., Measurement of oxygen consumption in disabled children by the Cosmed K2 portable telemetry system. Dev MedChild Neurol, 1996, 38 (7), 585-593, doi: 10.1111/j.1469-8749.1996.tb12123.x.[Crossref]
  • 9. Bowen T.R., Lennon N., Castagno P., Miller F., Richards J., Variability of energy-consumption measures in children with cerebral palsy. J Pediatr Orthop, 1998, 18 (6), 738-742.[Crossref]
  • 10. Keefer D.J., Tseh W., Caputo J.L., Apperson K., McGreal S., Morgan D.W., Within- and between-day stability of treadmill walking VO2 in children with hemiplegic cerebral palsy: Stability of walking VO2 in children with CP. GaitPosture, 2005, 21 (1), 80-84, doi: 10.1016/j.gaitpost.2004.01.004.[Crossref]
  • 11. Bar-Or O., Pediatric Sports Medicine for the Practitioner: From Physiologic Principles to Clinical Applications. Springer, New York 1983, 376.
  • 12. Harris D.J., Atkinson G., International Journal of Sports Medicine - Ethical Standards in Sport and Exercise Science Research. Int J Sports Med, 2009, 30 (10), 701-702, doi: 10.1055/s-0029-1237378[Crossref]
  • 13. Hicks J.L., Schwartz M.H., Arnold A.S., Delp S.L., Crouched postures reduce the capacity of muscles to extend the hip and knee during the single limb stance phase of gait. J Biomech, 2008, 41 (5), 960-967, doi: 10.1016/j.jbiomech.2008.01.002.[WoS][Crossref]
  • 14. Sutherland D.H., Davids J.R., Common gait abnormalities of the knee in cerebral palsy. Clin Orthop Relat Res, 1992, 288, 139-147.
  • 15. Williams K.R., Cavanagh P.R., Relationship between distance running mechanics, running economy, and performance. J Appl Phys, 1987, 63 (3), 1236-1245.
  • 16. Bennett B.C., Abel M.F., Wolovick A., Franklin T., Allaire P.E., Kerrigan D.C., Center of mass movement and energy transfer during walking in children with cerebral palsy. Arch Phys Med Rehabil, 2005, 86 (11), 2189-2194, doi: 10.1016/j.apmr.2005.05.012.[Crossref]
  • 17. Dierick F., Lefebvre C., van den Hecke A., Detrembleur C., Development of displacement of centre of mass during independent walking in children. Dev Med Child Neurol, 2004, 46 (8), 533-539, doi: 10.1111/j.1469-8749.2004. tb01011.x.[Crossref]
  • 18. Keefer D.J., Morgan D.W., Caputo J.L., Tseh W., Effect of a heel-loaded auditory feedback system on walking economy and gait speed in children with cerebral palsy: a preliminary study. Proceedings of the American Academy for Cerebral Palsy and Developmental Medicine, September 1999, Washington, DC.

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