Inspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power.

Hdl Handle:
http://hdl.handle.net/10545/292753
Title:
Inspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power.
Authors:
Johnson, Michael A.; Sharpe, Graham R.; Brown, Peter I.
Abstract:
We examined whether inspiratory muscle training (IMT) improved cycling time-trial performance and changed the relationship between limit work (W (lim)) and limit time (T (lim)), which is described by the parameters critical power (CP) and anaerobic work capacity (AWC). Eighteen male cyclists were assigned to either a pressure-threshold IMT or sham hypoxic-training placebo (PLC) group. Prior to and following a 6 week intervention subjects completed a 25-km cycling time-trial and three constant-power tests to establish the W (lim)-T (lim) relationship. Constant-power tests were prescribed to elicit exercise intolerance within 3-10 (Ex1), 10-20 (Ex2), and 20-30 (Ex3) min. Maximal inspiratory mouth pressure increased by (mean +/- SD) 17.1 +/- 12.2% following IMT (P < 0.01) and was accompanied by a 2.66 +/- 2.51% improvement in 25-km time-trial performance (P < 0.05); there were no changes following PLC. Constant-power cycling endurance was unchanged following PLC, as was CP (pre vs. post: 249 +/- 32 vs. 250 +/- 32 W) and AWC (30.7 +/- 12.7 vs. 30.1 +/- 12.5 kJ). Following IMT Ex1 and Ex3 cycling endurance improved by 18.3 +/- 15.1 and 15.3 +/- 19.1% (P < 0.05), respectively, CP was unchanged (264 +/- 62 vs. 263 +/- 61 W), but AWC increased from 24.8 +/- 5.6 to 29.0 +/- 8.4 kJ (P < 0.05). In conclusion, these data provide novel evidence that improvements in constant-power and cycling time-trial performance following IMT in cyclists may be explained, in part, by an increase in AWC.
Affiliation:
University of Derby, Department of Sport and Exercise
Citation:
Inspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power. 2007, 101 (6):761-70 Eur. J. Appl. Physiol.
Journal:
European Journal of Applied Physiology
Issue Date:
Dec-2007
URI:
http://hdl.handle.net/10545/292753
DOI:
10.1007/s00421-007-0551-3
PubMed ID:
17874123
Type:
Article
Language:
en
ISSN:
1439-6319
Appears in Collections:
Human Sciences Research Centre

Full metadata record

DC FieldValue Language
dc.contributor.authorJohnson, Michael A.en
dc.contributor.authorSharpe, Graham R.en
dc.contributor.authorBrown, Peter I.en
dc.date.accessioned2013-05-24T14:53:19Z-
dc.date.available2013-05-24T14:53:19Z-
dc.date.issued2007-12-
dc.identifier.citationInspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power. 2007, 101 (6):761-70 Eur. J. Appl. Physiol.en
dc.identifier.issn1439-6319-
dc.identifier.pmid17874123-
dc.identifier.doi10.1007/s00421-007-0551-3-
dc.identifier.urihttp://hdl.handle.net/10545/292753-
dc.description.abstractWe examined whether inspiratory muscle training (IMT) improved cycling time-trial performance and changed the relationship between limit work (W (lim)) and limit time (T (lim)), which is described by the parameters critical power (CP) and anaerobic work capacity (AWC). Eighteen male cyclists were assigned to either a pressure-threshold IMT or sham hypoxic-training placebo (PLC) group. Prior to and following a 6 week intervention subjects completed a 25-km cycling time-trial and three constant-power tests to establish the W (lim)-T (lim) relationship. Constant-power tests were prescribed to elicit exercise intolerance within 3-10 (Ex1), 10-20 (Ex2), and 20-30 (Ex3) min. Maximal inspiratory mouth pressure increased by (mean +/- SD) 17.1 +/- 12.2% following IMT (P < 0.01) and was accompanied by a 2.66 +/- 2.51% improvement in 25-km time-trial performance (P < 0.05); there were no changes following PLC. Constant-power cycling endurance was unchanged following PLC, as was CP (pre vs. post: 249 +/- 32 vs. 250 +/- 32 W) and AWC (30.7 +/- 12.7 vs. 30.1 +/- 12.5 kJ). Following IMT Ex1 and Ex3 cycling endurance improved by 18.3 +/- 15.1 and 15.3 +/- 19.1% (P < 0.05), respectively, CP was unchanged (264 +/- 62 vs. 263 +/- 61 W), but AWC increased from 24.8 +/- 5.6 to 29.0 +/- 8.4 kJ (P < 0.05). In conclusion, these data provide novel evidence that improvements in constant-power and cycling time-trial performance following IMT in cyclists may be explained, in part, by an increase in AWC.en
dc.language.isoenen
dc.rightsArchived with thanks to European Journal of Applied Physiologyen
dc.subject.meshAdult-
dc.subject.meshAnaerobic threshold-
dc.subject.meshAthletic performance-
dc.subject.meshBicycling-
dc.subject.meshExercise test-
dc.subject.meshHumans-
dc.subject.meshInspiratory capacity-
dc.subject.meshMale-
dc.subject.meshPhysical fitness-
dc.subject.meshRespiratory function tests-
dc.subject.meshRespiratory muscles-
dc.titleInspiratory muscle training improves cycling time-trial performance and anaerobic work capacity but not critical power.en
dc.typeArticleen
dc.contributor.departmentUniversity of Derby, Department of Sport and Exerciseen
dc.identifier.journalEuropean Journal of Applied Physiologyen

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