A Single-Visit Field Test of Critical Speed

Galbraith, Andy; Hopker, James G.; Lelliott, Stephen; Diddams, Louise; Passfield, Louis

doi:10.1123/ijspp.2013-0507

Cited by 55 publications

(137 citation statements)

References 17 publications

(15 reference statements)

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“…Participants completed three time to exhaustion (TTE) trials on the equipment described above. Work rates were equivalent to ~80%, ~100% and ~105% MAP, using a lowest to highest work rate order with a 30 min intra-trial recovery period (Galbraith et al 2014). Unpublished data from our laboratory supports the use of the testing methods by Galbraith et al in cycling.…”

Section: Methodssupporting

confidence: 70%

Validity and reliability of critical power field testing

et al. 2014

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2 2 ABSTRACT Purpose: To test the validity and reliability of field critical power (CP). Method: Laboratory CP tests comprised of three exhaustive trials at intensities of 80%, 100% and 105% maximal aerobic power and CP results were compared with those determined from the field. Experiment 1: cyclists performed three CP field tests which comprised maximal efforts of 12 min, 7 min and 3 min with a 30 min recovery between efforts. Experiment 2: cyclists performed 3 x 3 min, 3 x 7 min and 3 x 12 min individual maximal efforts in a randomised order in the field. Experiment 3: the highest 3 min, 7 min and 12 min power outputs were extracted from field training and racing data. Results:Standard error of the estimate of CP was 4.5%, 5.8% and 5.2% for experiments 1-3 respectively.Limits of Agreement for CP were -26 -29 W, 26 -53 W and -34 -44 W for experiments 1-3 respectively. Mean coefficient of variation in field CP was 2.4%, 6.5% and 3.5 % for experiments 1-3 respectively. Intraclass correlation coefficients of the three repeated trials for CP were 0.99, 0.96 and 0.99 for experiments 1-3 respectively. Conclusions: Results suggest field-testing using the different protocols from this research study, produce both valid and reliable CP values.

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Section: Methodssupporting

confidence: 70%

Validity and reliability of critical power field testing

et al. 2014

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“…Our results are in accordance with previous studies that investigated the reliability of the single-visit protocol during running [15] and cycling [24] in trained adults. For example, Galbraith et al [15] reported CVs of 2.0% (1.4% to 3.8%) and 1.3% (0.9% to 2.4%) for tests 2-1 and 3-2, respectively.…”

Section: Discussionsupporting

confidence: 83%

“…An additional explanation for the inconsistency found in untrained athletes might be the order of the prediction trials. While some studies started with the longest trial [15,16], others started with the shortest trial or randomly applied the trials [24,25]. Starting with the shortest trial in the present study, could have affected the untrained athletes due to inexperience with maximal efforts and this in turn might impact consistency.…”

Section: Discussionmentioning

confidence: 85%

“…The study involved three testing sessions, separated by 48 h, for each participant on a 400 m outdoor track. During each session, the participants were asked to complete three fixed distances in the shortest possible time (i.e., as fast as possible) using a 30 min recovery between the runs [15,16]. All sessions were performed at sea level, at approximately the same time of the day (±2 h) and the temperature and humidity were 22-25° C and 40%-45%, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…While the critical speed estimated from the single-visit field test has been shown to be reliable and valid in adults [15,16], the reliability in children and adolescents remains to be shown. Therefore, the aim of this study was to establish the reliability of CS and D′ obtained from the single-visit field test in trained and untrained adolescents.…”

Section: Introductionmentioning

confidence: 99%

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Reliability of the Single-Visit Field Test of Critical Speed in Trained and Untrained Adolescents

Nimmerichter

Steindl

Williams

2015

Sports

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Recent studies in adults have shown that the critical intensity during running and cycling estimated from three prediction trials interspersed by 30 min is valid and reliable. To establish the reliability of the single-visit field test to determine critical speed (CS) and the distance above critical speed (D′) in adolescents, 29 trained and 14 untrained participants (mean ± SD age: 17.5 ± 0.5 years) performed three tests on a 400-m outdoor track separated by 48 h. Each test consisted of three distances selected to result in finishing times between 2 and 15 min that must be completed as fast as possible. CS and D′ were modeled using the linear 1/time model (Speed = D′(1/t) + CS). While the coefficient of variation (CV) of CS was between 2.4% and 4.3%, the CV of D′ was 9.3% to 13.6%. Also the intraclass correlation coefficient ranged from 0.919 to 0.983 for CS and from 0.325 to 0.828 for D′. The results show that the single-visit field test provides reliable estimates of CS but not D′ in trained and untrained adolescents.

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A comparison of different methods to analyse data collected during time-to-exhaustion tests

et al. 2019

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Purpose Despite their widespread use in exercise physiology, time-to-exhaustion (TTE) tests present an often-overlooked challenge to researchers, which is how to computationally deal with between- and within-subject differences in exercise duration. We aimed to verify the best analysis method to overcome this problem. Methods Eleven cyclists performed an incremental test and three TTE tests differing in workload as preliminary tests. The TTEs were used to derive the individual power–duration relationship needed to set the workload (corresponding to an estimated TTE of 1200 s) for four identical experimental TTE tests. Within individuals, the four tests were subsequently rank ordered by performance. Physiological and psychological variables expected to change with performance were analysed using different methods, with the main aim being to compare the traditional “group isotime” method and a less-used “individual isotime” method. Results The four tests, ranked from the best to the worst, had a TTE of 1526 ± 332, 1425 ± 313, 1295 ± 325, and 1026 ± 265 s. Ratings of perceived exertion, minute ventilation, respiratory frequency, and affective valence were sensitive to changes in performance when their responses were analysed with the “individual isotime” method (P < 0.022, ηp2 > 0.144) but not when using the “group isotime” method, because the latter resulted in partial data loss. Conclusions The use of the “individual isotime” method is strongly encouraged to avoid the misinterpretation of the phenomenon under study. Important implications are not limited to constant-workload exercise, but extend to incremental exercise, which is another commonly used test of exercise tolerance.

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A Single-Visit Field Test of Critical Speed

Abstract: word count: 238Text-Only word count: 3155. Tables: 2 Figures and 3 Tables "A Single Number of Figures and

Cited by 55 publications

References 17 publications

Validity and reliability of critical power field testing

Validity and reliability of critical power field testing

Reliability of the Single-Visit Field Test of Critical Speed in Trained and Untrained Adolescents

A comparison of different methods to analyse data collected during time-to-exhaustion tests

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