dc.contributor.author | Saynor, ZL | |
dc.contributor.author | Barker, AR | |
dc.contributor.author | Oades, PJ | |
dc.contributor.author | Williams, CA | |
dc.date.accessioned | 2015-08-27T10:32:53Z | |
dc.date.issued | 2013-11 | |
dc.description.abstract | OBJECTIVES: Measuring aerobic fitness (V˙O2max) via a maximal cardiopulmonary exercise test is an important clinical tool in cystic fibrosis. This study sought to establish: (1) the validity of traditional criteria to verify maximal efforts during a ramp cardiopulmonary exercise test; and (2) whether V˙O2 measured during an exhaustive cardiopulmonary exercise test represents a valid V˙O2max in paediatric patients, using a subsequent exhaustive supramaximal (Smax) exercise test. DESIGN: Cross-sectional. METHODS: Fourteen patients (7-18 years; 10 males) completed an exhaustive ramp test to determine V˙O2max. Following 15-min recovery, Smax (110% ramp peak power output) was performed. RESULTS: Ramp test V˙O2peak was significantly higher than V˙O2 documented at traditional endpoint criteria, including a RER of 1.00 (0.99±0.47 L min(-1) vs. 1.83±0.78 L min(-1), p<0.001) and 1.10 (1.36±0.59 L min(-1) vs. 1.83±0.78 L min(-1), p<0.001), despite 100% of patients satisfying these two criteria. Only 23% and 75% of patients satisfied the 95% age-predicted heart rate (HR) maximum and 180 b min(-1) criteria. Whilst mean ramp and Smax V˙O2peak were not significantly different (1.83±0.78 L min(-1) vs. 1.82±0.67 L min(-1); p=0.88), at the individual level Smax elicited a 'meaningful' (>9%) increase in V˙O2peak (range 9.9-38.3%) compared with V˙O2peak from the ramp test in 3 of 14 cases (21.4%). CONCLUSIONS: Traditional criteria significantly underestimate V˙O2max in young cystic fibrosis patients. Conversely, Smax can confirm when 'true' V˙O2max is achieved. The use of Smax following cardiopulmonary exercise test represents an appropriate method to measure V˙O2max in young cystic fibrosis patients. | en_GB |
dc.description.sponsorship | NIHR Exeter Clinical Research Facility | en_GB |
dc.description.sponsorship | Royal Devon and Exeter NHS Foundation Trust Hospital | en_GB |
dc.identifier.citation | Journal of Science and Medicine in Sport, 2013, Vol. 16, pp. 539 - 544 | en_GB |
dc.identifier.doi | 10.1016/j.jsams.2013.01.010 | |
dc.identifier.uri | http://hdl.handle.net/10871/18137 | |
dc.publisher | Elsevier | en_GB |
dc.relation.url | http://www.ncbi.nlm.nih.gov/pubmed/23510652 | en_GB |
dc.rights | © 2013. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | en_GB |
dc.subject | Cystic fibrosis | en_GB |
dc.subject | Exercise test | en_GB |
dc.subject | Lungs | en_GB |
dc.subject | Paediatric physician | en_GB |
dc.subject | Physical fitness | en_GB |
dc.subject | Supramaximal verification | en_GB |
dc.subject | Adolescent | en_GB |
dc.subject | Child | en_GB |
dc.subject | Clinical Protocols | en_GB |
dc.subject | Cross-Sectional Studies | en_GB |
dc.subject | Cystic Fibrosis | en_GB |
dc.subject | Exercise Test | en_GB |
dc.subject | Female | en_GB |
dc.subject | Humans | en_GB |
dc.subject | Male | en_GB |
dc.subject | Oxygen Consumption | en_GB |
dc.title | A protocol to determine valid V˙O2max in young cystic fibrosis patients. | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2015-08-27T10:32:53Z | |
dc.identifier.issn | 1440-2440 | |
exeter.place-of-publication | Australia | |
dc.description | Clinical Trial | en_GB |
dc.description | Journal Article | en_GB |
dc.description | Research Support, Non-U.S. Gov't | en_GB |
dc.identifier.journal | Journal of Science and Medicine in Sport | en_GB |