Comparison of Critical Power and W′ Derived From 2 or 3 Maximal Tests

Simpson, Len Parker; Kordi, Mehdi

doi:10.1123/ijspp.2016-0371

Cited by 19 publications

(23 citation statements)

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“…Fixed-duration maximal time trial efforts (TT): Details of these experimental procedures are provided elsewhere (Parker Simpson & Kordi, 2016). Briefly, all TT efforts began with participants increasing power output in the 10-to 15-s period prior to the start of a TT toward their pre-effort target power (see below for further information about 'TT target powers').…”

Section: Methodsmentioning

confidence: 99%

Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Kordi

Fullerton

Passfield

et al. 2018

European Journal of Sport Science

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Body position is known to alter power production and affect cycling performance. The aim of this study was to compare mechanical power output in two riding positions, and to calculate the effects on critical power (CP) and W' estimates. Seven trained cyclists completed three peak power output efforts and three fixed-duration trial (3-, 5- and 12-min) riding with their hands on the brake lever hoods (BLH), or in a time trial position (TTP). A repeated-measures analysis of variance showed that mean power output during the 5-min trial was significantly different between BLH and TTP positions, resulting in a significantly lower estimate of CP, but not W', for the TTP trial. In addition, TTP decreased the performance during each trial and increased the percentage difference between BLH and TTP with greater trial duration. There were no differences in pedal cadence or heart rate during the 3-min trial; however, TTP results for the 12-min trial showed a significant fall in pedal cadence and a significant rise in heart rate. The findings suggest that cycling position affects power output and influences consequent CP values. Therefore, cyclists and coaches should consider the cycling position used when calculating CP.

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Section: Methodsmentioning

confidence: 99%

Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Kordi

Fullerton

Passfield

et al. 2018

European Journal of Sport Science

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“…To address this issue, some authors have investigated whether a shorter recovery between trials affects CP and/or W'(15,45,63,85,97,105).Karsten et al (64) compared the conventional 24 h method with two experimental recovery durations of 3 h and 30 min. The authors observed that, in comparison with the standard 24-h-recovery protocol, the two shorter recovery protocols were sufficient to not affect CP (prediction error of 2.5% and 3.7% for the 3 h and 30 min recovery protocols, respectively, compared to 24 h).…”

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confidence: 99%

Methodological Approaches and Related Challenges Associated With the Determination of Critical Power and Curvature Constant

Muniz‐Pumares

Karsten

Triska

et al. 2019

Journal of Strength and Conditioning Research

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“…However, our sample size is similar to several other studies that investigated the critical power model in exercise. [8][9][10][11][23][24][25] From a practical point of view, the CHR seems to be an interesting alternative in exercise prescription to the load on the CP, since both indicators Table 3. Individual values of the HR at AT, RCP, and CHR measure and CHR estimated.…”

Section: Discussionmentioning

confidence: 99%

Critical vs Estimated Heart Rate in Elderly Subjects

Colucci

Corso

Borges

et al. 2020

Rev Bras Med Esporte

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Introduction: Heart rate (HR) has been a simple and easy-to-use physiological parameter widely used to determine exercise intensity. The critical power fatigue limit model, known as the critical heart rate (CHR), can be extrapolated to HR. However, an estimate for a CHR mathematical model has not yet been extrapolated for upper limb exercise in the elderly. Objective: To compare the mathematical model previously used to estimate CHR with the heart rate values at the critical power (CP) during arm-ergometer exercises in elderly subjects. Methods: After an initial maximum-incremental exercise test on a cycle arm-ergometer, seven elderly people performed four high-intensity constant-load tests to the limit of tolerance (Tlim), to determine CP and critical heart rate (CHR). For each power output, the heart rate of the last five seconds (HRlim) and total time to exhaustion (in minutes) were obtained. The slope coefficients of the regression lines between HRlim and Tlim were defined as CHR, and between Wlim and Tlim as CP. A square-wave test was performed on a different day, in the power determined as equivalent to CP, and the heart rate at CP (CPHR) was assessed. Results: The HR-Tlim relationship was found to be hyperbolic in all subjects, who were able to sustain upper-limb exercise at CP for 20 min. CP attained 66.8±9.4% of peak work rate in the ramp test. The real average HR measured in the CP test was strikingly similar to the CHR calculated by the mathematical model of PC (137.6±16.9 versus 139.7±13.3bpm, respectively, p=0.53). There was strong correlation between the real and the estimated CHR. Conclusion: This study indicated that the maximal sustainable exercise intensity can be based on a physiological variable such as HR, and the CHR test can define exercise endurance, which can be useful in performance assessment and training prescription. Level of evidence II; Diagnostic studies – Investigating a diagnostic test.

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Comparison of Critical Power and W′ Derived From 2 or 3 Maximal Tests

Cited by 19 publications

References 0 publications

Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Influence of upright versus time trial cycling position on determination of critical power and W′ in trained cyclists

Methodological Approaches and Related Challenges Associated With the Determination of Critical Power and Curvature Constant

Critical vs Estimated Heart Rate in Elderly Subjects

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