The Cosmed K4 Telemetry System as an Accurate Device for Oxygen Uptake Measurements during Exercise
The purpose of this study was to test the accuracy of oxygen uptake (VO2) measurements using the Cosmed K4 portable telemetry system. This system of higher technology than the original Cosmed K2 device, contains a CO2 electrode allowing measurements alternatively by either the Cosmed K4 system (K4)...
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| Veröffentlicht in: | International journal of sports medicine 1997-08, Vol.28 (6), p.449-453 |
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| creator | Hausswirth, C. Bigard, A. X. Le Chevalier, J. M. |
| description | The purpose of this study was to test the accuracy of oxygen uptake (VO2) measurements using the Cosmed K4 portable telemetry system. This system of higher technology than the original Cosmed K2 device, contains a CO2 electrode allowing measurements alternatively by either the Cosmed K4 system (K4) or the CPX Medical Graphics (CPX) during a maximum oxygen uptake (VO2max) ergocycle test, at rest and during several submaximal exercises (25, 50 and 75% of maximal work rate) in seven subjects. Heart rate values were comparable for exercise at the same work stage during gas collection using the two systems, indicating that the physiological stresses were similar. The VO2 values did not significantly differ at rest (4.40+/-0.83 vs 4.16+/-0.58ml x min(-1) x kg[-1]), at 25% Wmax (20.97+/-1.31 vs 21.32+/-2.54 ml x min(-1) x kg[-1]), at 50% Wmax (33.32+/-3.92 vs 33.50+/-3.51 ml x min(-1) x kg[-1]), at 75% Wmax (47.01+/-7.51 vs 47.49+/-7.11 ml x min(-1) kg[-1]) and at maximal intensities (62.07+/-8.48 vs 62.84+/-11.31 ml x min(-1) kg[-1]) using K4 and CPX devices, respectively. The results of this study indicated that the K4 system was accurate for all oxygen uptake measurements from rest to maximum exercise levels. |
| doi_str_mv | 10.1055/s-2007-972662 |
| format | Article |
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The VO2 values did not significantly differ at rest (4.40+/-0.83 vs 4.16+/-0.58ml x min(-1) x kg[-1]), at 25% Wmax (20.97+/-1.31 vs 21.32+/-2.54 ml x min(-1) x kg[-1]), at 50% Wmax (33.32+/-3.92 vs 33.50+/-3.51 ml x min(-1) x kg[-1]), at 75% Wmax (47.01+/-7.51 vs 47.49+/-7.11 ml x min(-1) kg[-1]) and at maximal intensities (62.07+/-8.48 vs 62.84+/-11.31 ml x min(-1) kg[-1]) using K4 and CPX devices, respectively. The results of this study indicated that the K4 system was accurate for all oxygen uptake measurements from rest to maximum exercise levels.</description><identifier>ISSN: 0172-4622</identifier><identifier>EISSN: 1439-3964</identifier><identifier>DOI: 10.1055/s-2007-972662</identifier><identifier>PMID: 9351691</identifier><identifier>CODEN: IJSMDA</identifier><language>eng</language><publisher>Stuttgart: Thieme</publisher><subject>Adult ; Biological and medical sciences ; Blood gas. Hemoglobin. Myoglobin. Hemotissulary gas exchange. 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X.</creatorcontrib><creatorcontrib>Le Chevalier, J. M.</creatorcontrib><title>The Cosmed K4 Telemetry System as an Accurate Device for Oxygen Uptake Measurements during Exercise</title><title>International journal of sports medicine</title><addtitle>Int J Sports Med</addtitle><description>The purpose of this study was to test the accuracy of oxygen uptake (VO2) measurements using the Cosmed K4 portable telemetry system. This system of higher technology than the original Cosmed K2 device, contains a CO2 electrode allowing measurements alternatively by either the Cosmed K4 system (K4) or the CPX Medical Graphics (CPX) during a maximum oxygen uptake (VO2max) ergocycle test, at rest and during several submaximal exercises (25, 50 and 75% of maximal work rate) in seven subjects. Heart rate values were comparable for exercise at the same work stage during gas collection using the two systems, indicating that the physiological stresses were similar. The VO2 values did not significantly differ at rest (4.40+/-0.83 vs 4.16+/-0.58ml x min(-1) x kg[-1]), at 25% Wmax (20.97+/-1.31 vs 21.32+/-2.54 ml x min(-1) x kg[-1]), at 50% Wmax (33.32+/-3.92 vs 33.50+/-3.51 ml x min(-1) x kg[-1]), at 75% Wmax (47.01+/-7.51 vs 47.49+/-7.11 ml x min(-1) kg[-1]) and at maximal intensities (62.07+/-8.48 vs 62.84+/-11.31 ml x min(-1) kg[-1]) using K4 and CPX devices, respectively. The results of this study indicated that the K4 system was accurate for all oxygen uptake measurements from rest to maximum exercise levels.</description><subject>Adult</subject><subject>Biological and medical sciences</subject><subject>Blood gas. Hemoglobin. Myoglobin. Hemotissulary gas exchange. Acid-base balance</subject><subject>Equipment Design</subject><subject>Exercise - physiology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Heart Rate</subject><subject>Humanities and Social Sciences</subject><subject>Humans</subject><subject>Male</subject><subject>Materials Testing</subject><subject>Oxygen Consumption</subject><subject>Pulmonary Gas Exchange</subject><subject>Reproducibility of Results</subject><subject>Respiratory Mechanics</subject><subject>Space life sciences</subject><subject>Sport</subject><subject>Sport physiology</subject><subject>Telemetry</subject><subject>Training and Testing</subject><subject>Vertebrates: respiratory system</subject><issn>0172-4622</issn><issn>1439-3964</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkUtvEzEURi0EKqGwZInkBUJCYsCv8WMZhUIRQV2Qrq0b504zZR6pPVM1_x6PJsoOsbLke_zZPh8hbzn7zFlZfkmFYMwUzgitxTOy4Eq6QjqtnpMF40YUSgvxkrxK6Z4xrhyXF-TCyZJrxxckbPZIV31qcUd_KrrBBlsc4pH-PqYBWwqJQkeXIYwRBqRf8bEOSKs-0pun4x129PYwwB-kvxDSGPPZbkh0N8a6u6NXTxhDnfA1eVFBk_DNab0kt9-uNqvrYn3z_cdquS6CKu1QBKstZwG0lsoJCYFXIHdO53VbMQmsVHLLMf9zF6xwwbhtabWREhlA0JW8JB_n3D00_hDrFuLR91D76-XaT3tZh-WmNI88sx9m9hD7hxHT4Ns6BWwa6LAfkzdOmuzV_Rfk1uqyNBNYzGCIfUoRq_MTOPNTUz75qSk_N5X5d6fgcZvtn-lTNXn-_jSHFKCpInRZ5hkTNoepKebTjA37Ouv39_0Yu2z5H7f-Bc6kpww</recordid><startdate>19970801</startdate><enddate>19970801</enddate><creator>Hausswirth, C.</creator><creator>Bigard, A. 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| ispartof | International journal of sports medicine, 1997-08, Vol.28 (6), p.449-453 |
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| language | eng |
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| source | MEDLINE; Thieme Connect Journals |
| subjects | Adult Biological and medical sciences Blood gas. Hemoglobin. Myoglobin. Hemotissulary gas exchange. Acid-base balance Equipment Design Exercise - physiology Fundamental and applied biological sciences. Psychology Heart Rate Humanities and Social Sciences Humans Male Materials Testing Oxygen Consumption Pulmonary Gas Exchange Reproducibility of Results Respiratory Mechanics Space life sciences Sport Sport physiology Telemetry Training and Testing Vertebrates: respiratory system |
| title | The Cosmed K4 Telemetry System as an Accurate Device for Oxygen Uptake Measurements during Exercise |
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