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Updated: Jan 8, 2026

Determining the Contribution of the Energy Systems During Exercise

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

インターバル式チームスポーツ運動中のパワー持続時間関係のダイナミクス

Matthew I Black¹, James A Lewis¹, Yujie Liu¹

¹Public Health and Sports Science, University of Exeter Medical School, St Luke's Campus, Exeter, UNITED KINGDOM.

Medicine and science in sports and exercise

|December 23, 2025

要旨

Purpose:

To (1) determine whether critical power (CP), W' and W' reconstitution kinetics (W'REC) are altered by high-intensity team-sport specific intermittent exercise; (2) examine the accuracy with which W' balance (W'BAL) is estimated by the W'BAL model; (3) examine whether physiological variables assessed during ramp incremental exercise and the 3-min all-out test, explain exercise-induced changes in the power-duration relationship.

Methods:

CP, W' and W'REC were determined during a repeated all-out test, which comprised a 3-min all-out test and a 2-min all-out test, separated by 90 s, in 13 recreationally active team-sport players. The test was performed in a rested condition (control) and immediately following a 40-min (40-IST) and 80-min (80-IST) intermittent sprint test.

Results:

CP assessed following the 40-IST (222±57 W) and 80-IST (213±49 W) were not different to control (222±52 W; P>0.05). W'REC was also not significantly different to control (0.08 ± 0.02 kJs -2) following the 40-IST (0.07±0.02 kJs -2) or 80-IST (0.07±0.02 kJs-2; P>0.05). W' was lower than control (13.5±4.0 kJ) following the 40-IST (10.1±4.0 kJ) and 80-IST (9.1±3.5 kJ) (both P<0.05). Following the 40-IST, W'BAL was not significantly different to the value predicted from the W'BAL model (10.9±2.4 kJ; P>0.05), but W'BAL was over-estimated by the model following the 80-IST (10.7±2.6 kJ; P<0.05). There were considerable inter-individual differences in the changes in the power-duration relationship following exercise which were not related to physiological variables assessed in the control condition.

Conclusions:

CP and W'REC are not altered after intermittent exercise, but W' is decreased, with considerable heterogeneity in the changes in the power-duration relationship between individuals. These results have important implications for the application of the W'BAL model to describe intermittent exercise performance.

キーワード:

CRITICAL POWER EXECISE PERFORMANCE RECONSTITUTION RECOVERY W′

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