Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling.

B Karsten, J Hopker, Simon Jobson, J Baker, L Petrigna, A Klose, C Beedie

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (pV : O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of pV : O2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h intertrial recovery (CP3/W’3), and protocol C used 30-min inter-trial recovery period (CP0.5/W’0.5). CP and W’ were calculated using the inverse time (1/t) versus power (P) relation (P = W’(1/t) + CP). Results: 95% Limits of Agreement between protocol A and B were −9 to 15 W; −7.4 to 7.8 kJ (CP/W’) and between protocol A and protocol C they were −27 to 22 W; −7.2 to 15.1 kJ (CP/W’). Compared to criterion protocol A, the average prediction error of protocol B was 2.5% (CP) and 25.6% (W’), whilst for protocol C it was 3.7% (CP) and 32.9% (W’). Conclusion: 3-h and 30-min inter-trial recovery time protocols provide valid methods of determining CP but not W’ in cycling.
Original languageEnglish
Pages (from-to)1420-1425
JournalJournal of Sports Sciences
Volume35
Issue number14
Publication statusPublished - 17 Aug 2016

Keywords

  • Critical intensity
  • power-duration relationship
  • exercise testing
  • anaerobic work capacity
  • validity

Cite this

Karsten, B., Hopker, J., Jobson, S., Baker, J., Petrigna, L., Klose, A., & Beedie, C. (2016). Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling. Journal of Sports Sciences, 35(14), 1420-1425.
Karsten, B ; Hopker, J ; Jobson, Simon ; Baker, J ; Petrigna, L ; Klose, A ; Beedie, C. / Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling. In: Journal of Sports Sciences. 2016 ; Vol. 35, No. 14. pp. 1420-1425.
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title = "Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling.",
abstract = "Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (pV : O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80{\%}, 100{\%} and 105{\%} of pV : O2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h intertrial recovery (CP3/W’3), and protocol C used 30-min inter-trial recovery period (CP0.5/W’0.5). CP and W’ were calculated using the inverse time (1/t) versus power (P) relation (P = W’(1/t) + CP). Results: 95{\%} Limits of Agreement between protocol A and B were −9 to 15 W; −7.4 to 7.8 kJ (CP/W’) and between protocol A and protocol C they were −27 to 22 W; −7.2 to 15.1 kJ (CP/W’). Compared to criterion protocol A, the average prediction error of protocol B was 2.5{\%} (CP) and 25.6{\%} (W’), whilst for protocol C it was 3.7{\%} (CP) and 32.9{\%} (W’). Conclusion: 3-h and 30-min inter-trial recovery time protocols provide valid methods of determining CP but not W’ in cycling.",
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Karsten, B, Hopker, J, Jobson, S, Baker, J, Petrigna, L, Klose, A & Beedie, C 2016, 'Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling.', Journal of Sports Sciences, vol. 35, no. 14, pp. 1420-1425.

Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling. / Karsten, B; Hopker, J; Jobson, Simon; Baker, J; Petrigna, L; Klose, A; Beedie, C.

In: Journal of Sports Sciences, Vol. 35, No. 14, 17.08.2016, p. 1420-1425.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling.

AU - Karsten, B

AU - Hopker, J

AU - Jobson, Simon

AU - Baker, J

AU - Petrigna, L

AU - Klose, A

AU - Beedie, C

PY - 2016/8/17

Y1 - 2016/8/17

N2 - Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (pV : O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of pV : O2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h intertrial recovery (CP3/W’3), and protocol C used 30-min inter-trial recovery period (CP0.5/W’0.5). CP and W’ were calculated using the inverse time (1/t) versus power (P) relation (P = W’(1/t) + CP). Results: 95% Limits of Agreement between protocol A and B were −9 to 15 W; −7.4 to 7.8 kJ (CP/W’) and between protocol A and protocol C they were −27 to 22 W; −7.2 to 15.1 kJ (CP/W’). Compared to criterion protocol A, the average prediction error of protocol B was 2.5% (CP) and 25.6% (W’), whilst for protocol C it was 3.7% (CP) and 32.9% (W’). Conclusion: 3-h and 30-min inter-trial recovery time protocols provide valid methods of determining CP but not W’ in cycling.

AB - Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (pV : O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of pV : O2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h intertrial recovery (CP3/W’3), and protocol C used 30-min inter-trial recovery period (CP0.5/W’0.5). CP and W’ were calculated using the inverse time (1/t) versus power (P) relation (P = W’(1/t) + CP). Results: 95% Limits of Agreement between protocol A and B were −9 to 15 W; −7.4 to 7.8 kJ (CP/W’) and between protocol A and protocol C they were −27 to 22 W; −7.2 to 15.1 kJ (CP/W’). Compared to criterion protocol A, the average prediction error of protocol B was 2.5% (CP) and 25.6% (W’), whilst for protocol C it was 3.7% (CP) and 32.9% (W’). Conclusion: 3-h and 30-min inter-trial recovery time protocols provide valid methods of determining CP but not W’ in cycling.

KW - Critical intensity

KW - power-duration relationship

KW - exercise testing

KW - anaerobic work capacity

KW - validity

M3 - Article

VL - 35

SP - 1420

EP - 1425

IS - 14

ER -

Karsten B, Hopker J, Jobson S, Baker J, Petrigna L, Klose A et al. Comparison of inter-trial recovery times for the determination of critical power and W’ in cycling. Journal of Sports Sciences. 2016 Aug 17;35(14):1420-1425.