title: A comparison of methods to estimate anaerobic capacity: Accumulated oxygen deficit and W' during constant and all-out work-rate profiles.
abstract: This study investigated (i) whether the accumulated oxygen deficit (AOD) and curvature constant of the power-duration relationship (W') are different during constant work-rate to exhaustion (CWR) and 3-min all-out (3MT) tests and (ii) the relationship between AOD and W' during CWR and 3MT. Twenty-one male cyclists (age: 40 ± 6 years; maximal oxygen uptake [V̇O2max]: 58 ± 7 ml · kg-1· min-1) completed preliminary tests to determine the V̇O2-power output relationship and V̇O2max. Subsequently, AOD and W' were determined as the difference between oxygen demand and oxygen uptake and work completed above critical power, respectively, in CWR and 3MT. There were no differences between tests for duration, work, or average power output (P ≥ 0.05). AOD was greater in the CWR test (4.18 ± 0.95 vs. 3.68 ± 0.98 L; P = 0.004), whereas W' was greater in 3MT (9.55 ± 4.00 vs. 11.37 ± 3.84 kJ; P = 0.010). AOD and W' were significantly correlated in both CWR (P < 0.001, r = 0.654) and 3MT (P < 0.001, r = 0.654). In conclusion, despite positive correlations between AOD and W' in CWR and 3MT, between-test differences in the magnitude of AOD and W', suggest that both measures have different underpinning mechanisms.
authors.affiliation: a School of Sport, Health and Applied Science , St Mary's University , Twickenham , UK.|b Department of Psychology and Sport Science, School of Life and Medical Sciences , University of Hertfordshire , Hatfield , UK.
authors.forename: Daniel
authors.identifier: http://orcid.org/0000-0002-6748-9870
authors.initials: D
authors.lastname: Muniz-Pumares
authors.affiliation: a School of Sport, Health and Applied Science , St Mary's University , Twickenham , UK.
authors.forename: Charles
authors.initials: C
authors.lastname: Pedlar
authors.affiliation: c The Centre for Sports Medicine and Human Performance , Brunel University , Uxbridge , UK.
authors.forename: Richard
authors.initials: R
authors.lastname: Godfrey
authors.affiliation: a School of Sport, Health and Applied Science , St Mary's University , Twickenham , UK.
authors.forename: Mark
authors.initials: M
authors.lastname: Glaister
mesh_terms: D000328:Adult; D004734:Energy Metabolism / Q000502:physiology; D005080:Exercise Test / Q000379:methods*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*
keywords: AOD; anaerobic; anaerobic work capacity; high-intensity