Show simple item record

dc.contributor.authorLeo, Jeffrey A
dc.contributor.authorSabapathy, Surendran
dc.contributor.authorSimmonds, Michael J
dc.contributor.authorCross, Troy J
dc.description.abstractPurpose: It is unclear whether the respiratory compensation point (RCP) may be used as a valid surrogate for critical power (CP). Accordingly, we sought to determine the measurement agreement between the CP and the RCP obtained during incremental cycling of varying ramp slopes. Methods: Eleven recreationally active men completed three separate ramp-incremental cycling protocols, where the work rate increment was slow (SR, 15 W·min−1), medium (MR, 30 W·min−1), or fast (FR, 45 W·min−1). The RCP was obtained using the ventilatory equivalent for CO2 output method. The CP was determined via Morton's model for ramp-incremental exercise. The assumption that the RCP and the CP occur at equivalent external work rates was assessed by one-way repeated-measures ANOVA and by evaluating the concordance correlation coefficient (CCC) and typical error (root-mean-square error [RMSE]) for each ramp protocol, separately. Results: The external work rate corresponding to the RCP increased with increases in the ramp-incremental slope (P < 0.05). The RCP values in MR (268 ± 37 W) and FR (292 ± 41 W), but not SR (243 ± 35 W), were different (P < 0.05) from CP (247 ± 43 W). The degree to which the relationship between the CP and the RCP approximated the line of identity was relatively poor for SR (CCC = 0.73 and RMSE = 28 W), MR (CCC = 0.63 and RMSE = 36 W), and FR (CCC = 0.42 and RMSE = 55 W). Conclusions: Our data confirm that the external work rate associated with the RCP is labile and that these power outputs display poor measurement agreement with the CP. Taken together, these findings indicate that the RCP does not provide an accurate estimation of CP.
dc.publisherLippincott Williams & Wilkins
dc.relation.ispartofjournalMedicine and Science in Sports and Exercise
dc.subject.fieldofresearchHuman Movement and Sports Science not elsewhere classified
dc.subject.fieldofresearchHuman Movement and Sports Sciences
dc.subject.fieldofresearchMedical Physiology
dc.subject.fieldofresearchPublic Health and Health Services
dc.titleThe Respiratory Compensation Point is Not a Valid Surrogate for Critical Power
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Health, School of Allied Health Sciences
gro.hasfulltextNo Full Text
gro.griffith.authorSabapathy, Surendran
gro.griffith.authorSimmonds, Michael J.
gro.griffith.authorCross, Troy J.
gro.griffith.authorLeo, Jeffrey

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record