Endurance training enhances critical power

Jenkins, David G.; Quigley, Brian M.

doi:10.1249/00005768-199211000-00014

Cited by 102 publications

(88 citation statements)

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“…Although it is true that interventions such as creatine loading, glycogen depletion, and endurance or high-intensity interval training have predictable effects on the parameters of the power Áduration relationship (Jenkins & Quigley, 1992, 1993Miura et al ., 1999Miura et al ., , 2000Poole et al ., 1990), it is much harder to explain the influence of prior exercise and pacing on W ? if one accepts the assumption that W ?…”

Section: Practical Implications and Conclusionmentioning

confidence: 99%

Oxygen uptake kinetics as a determinant of sports performance

Burnley

Jones

2007

European Journal of Sport Science

328

331

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It is well known that physiological variables such as maximal oxygen uptake (V O 2max ), exercise economy, the lactate threshold, and critical power are highly correlated with endurance exercise performance. In this review, we explore the basis for these relationships by explaining the influence of these ''traditional'' variables on the dynamic profiles of the V O 2 response to exercise of different intensities, and how these differences in V O 2 dynamics are related to exercise tolerance and fatigue. The existence of a ''slow component'' of V O 2 during exercise above the lactate threshold reduces exercise efficiency and mandates a greater consumption of endogenous fuel stores (chiefly muscle glycogen) for muscle respiration. For higher exercise intensities (above critical power), steady states in blood acid Ábase status and pulmonary gas exchange are not attainable and V O 2 will increase with time until V O 2max is reached. Here, we show that it is the interaction of the V O 2 slow component, V O 2max , and the ''anaerobic capacity'' that determines the exercise tolerance. Essentially, we take the view that an appreciation of the various exercise intensity ''domains'' and their characteristic effects on V O 2 dynamics can be helpful in improving our understanding of the determinants of exercise tolerance and the limitations to endurance sports performance. The reciprocal effects of interventions such as training, prior exercise, and manipulations of muscle oxygen availability on aspects of V O 2 kinetics and exercise tolerance are consistent with this view.

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Section: Practical Implications and Conclusionmentioning

confidence: 99%

Oxygen uptake kinetics as a determinant of sports performance

Burnley

Jones

2007

European Journal of Sport Science

328

331

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“…The CP test can be used to predict both anaerobic and aerobic exercise performance (15,27,28,36,38,43,45). The AWC has been correlated with maximal oxygen deficit (19) and work performed in a 30 s all-out cycle ergometer test (36,43).…”

Section: Thus P(t Lim ) = Awc + Cp(t Lim ) and T Lim = Awc/(p -Cp) (mentioning

confidence: 99%

“…Alternatively, CP has been used to predict endurance capability (15,27,38,45). Jenkins and Quigley (27) found that training at or near CP for 8 weeks resulted in a 30% increase in CP and a 7% increase in maximal oxygen consumption rate (…”

Section: Thus P(t Lim ) = Awc + Cp(t Lim ) and T Lim = Awc/(p -Cp) (mentioning

confidence: 99%

A New Single Work Bout Test to Estimate Critical Power and Anaerobic Work Capacity

Bergstrom

Housh

Zúñiga

et al. 2012

Journal of Strength and Conditioning Research

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The purpose of the present study was to develop a new 3-min, single workbout test to estimate critical power (CP) and anaerobic work capacity (AWC) using the Monark cycle ergometer with the resistance based on the individual's body weight.Twelve moderately-trained adults (6 men and 6 women; mean age ± SD = 23.2 ± 3.5 yr)performed an incremental cycle ergometer test to exhaustion. The CP and AWC were estimated from the original work limit (W lim ) versus time limit (T lim ) relationship (CP PT ) and a 3-min all-out test (CP 3min ) against a fixed resistance and compared to CP and AWC estimated from the new 3-min tests on the Monark cycle ergometer (CP 3.5% and CP 4.5% ).The resistance values for the CP 3.5% and CP 4.5% tests were set at 3.5% and 4.5% of the subject's body weight (kg). The Mean differences between estimates of CP and AWC derived from the four methods (CP PT , CP 3min , CP 3.5% and CP 4.5% ) were analyzed using separate one-way repeated measures ANOVAs with paired t-tests and Bonferroni corrections for post-hoc comparisons. The relationships among the four estimates of CP and AWC were described using Pearson product-moment correlations and separate zeroorder correlation matrices. The results indicated that there were no significant differences (p > 0.05) among mean CP values for CP PT (178 ± 47 W), CP 3.5% (173 ± 40 W), and CP 4.5% (186 ± 44 W). The mean CP 3min (193 ± 54 W), however, was significantly greater than CP PT and CP 3.5% . There were no significant differences in AWC for the CP PT (13412 ± 6247 J), CP 3min (10895 ± 2923 J), and CP 4.5% (9842 ± 4394 J). The AWC values for the CP PT and CP 3min , however, were significantly greater than CP 3.5% (8357 ± 2946J). The results of the present study indicated that CP and AWC could be estimated from a single 3-min workbout test on the Monark cycle ergometer with the resistance set at 4.5% of body weight. ACKNOWLEDGEMENTS

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“…CP is associated with the muscle's aerobic power (Gaesser and Wilson, 1988, Gaesser et al, 1995, Jenkins and Quigley, 1992, McLellan and Cheung, 1992, Miura et al, 1999, Miura et al, 2000, Moritani et al, 1981, Moritani et al, 1981, Poole et al, 1990, while W` represents predominantly 'anaerobic' characteristics (Ferguson et al, 2007, Ferguson et al, 2010, Gaesser and Wilson, 1988, Jenkins and Quigley, 1992, Miura et al, 1999, Miura et al, 2000, Moritani et al, 1981, Poole et al, 1990 and is determined, in part, by intramuscular energy stores of phosphate, glycogen, and oxygen (Miura et al, 1999, Miura et al, 2000, Monod and Scherrer, 1965 as well as by accumulation of fatigue-inducing metabolites (Coats et al, 2003, Ferguson et al, 2007. CP demarcates the heavy-severe domain boundary in that, at or below CP a general steady state is achieved , Poole et al, 1988 , Poole et al, 1988.…”

Section: Introductionmentioning

confidence: 99%