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The relationship between an increased aerobic power and the excess post exercise oxygen consumption

University of British Columbia

As a result of aerobic training, the rate and magnitude of the recovery VO₂ following submaximal exercise at the same absolute workloads is decreased (Hagberg et al., 1980). To date there has been little research associated with the effects of an increased aerobic power on the recovery VO₂ following supramaximal exercise. The purpose of this study was to determine the effects of an increased aerobic power on the excess post exercise oxygen consumption (EPOC) after a supramaximal exercise test. A secondary purpose was to determine the relationships between the increased aerobic power and the recovery VO₂ rate and magnitude. Ten untrained males participated in a six week training study. The subjects performed pre and post training VO₂[sub max] tests and Anaerobic Speed Tests (ASTs). EPOC volume and EPOC rate components (τ₁ and τ₂) as well as post exercise blood lactate response were measured following a 2 minAST. Significant differences were evident between pre and post training relative and absolute VO₂[sub max] scores (46.38 + 3.74 ml-kg⁻¹ min⁻¹ vs. 51.82 ± 5.21 mlkg⁻¹ min⁻¹ and 3.61 + 0.42 Lmin⁻¹ vs. 4.00 ± 0.44 Lmin⁻¹; p<0.05). EPOC volume was significantly decreased following the endurance training program (9.13 ± 1.68 L vs. 7.49 ± 1.73 L; p<0.05). Significant differences were found between the pre and post training fast VO₂ recovery rate (τ₁) (2.69 ± 0.19 min. vs. 2.29 + 0.33 min.; p<0.05) and the pre and post training slow VO₂ recovery rate (τ₂) (43.74 ± 5.12 min. vs. 39.63 ± 4.24 min.; p<0.05). Post exercise blood lactate response was significantly decreased following the training program (15.28 ± 1.80 mmolL⁻¹ vs. 13.36 + 1.55 mmolL⁻¹; p<0.05). A significant relationship was found between the change in VO₂[sub max] and the change in blood lactate concentration (r=0.73; p<0.05). No significant relationships were evident between VO₂[sub max], EPOC volume, or EPOC recovery rates (p>0.05). The results of this study indicate that aerobic training can decrease the VO₂ recovery volume and rate, as well as decrease the blood lactate response associated with anaerobic exercise. However, the rate and magnitude of the recovery VO₂ from supramaximal work appear to be independent of VO₂[sub max].

Thesis/Dissertation

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2009-03-25

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http://hdl.handle.net/2429/6489

Human Kinetics

University of British Columbia

UBCV

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