Critical velocity estimates lactate minimum velocity in youth runners

Browne, Rodrigo Alberto Vieira; Sales, Marcelo Magalhães; Sotero, Rafael da Costa; Asano, Ricardo Yukio; Moraes, José Fernando Vila Nova de; Barros, Jônatas de França; Campbell, Carmen Sílvia Grubert; Simões, Herbert Gustavo

doi:10.1590/s1980-65742015000100001

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Despite the fact that several studies followed the original 8 min recovery (Bacon and Kern, 1999; Carter et al, 1999a,b, 2000; MacIntosh et al, 2002; Dantas De Luca et al, 2003; Ribeiro et al, 2003; Zagatto et al, 2004, 2013, 2014; Simões et al, 2005, 2009; Hiyane et al, 2006; Altimari et al, 2007, 2010; Azevedo et al, 2007; Silva et al, 2007; Pardono et al, 2008; Johnson et al, 2009; Johnson and Sharpe, 2011; Mota et al, 2011; Barbieri and Gobatto, 2013; Camargo et al, 2013; Mezzaroba and Machado, 2013; Miranda et al, 2013; Miyagi et al, 2013, 2015; Campos et al, 2014; Messias et al, 2015), a myriad of recovery manipulations is also observed, especially regarding the recovery type and intensity (Davison et al, 2000; Smith et al, 2002; Rotstein et al, 2007; Silva et al, 2007; Sotero et al, 2007, 2009, 2011; Knoepfli-Lenzin and Boutellier, 2011; Vicente-Campous et al, 2014; Browne et al, 2015). Some attention has been given to this phase due to its potential LMI influence.…”

Section: Can the Lmt Be Influenced By Methodological Aspects?mentioning

confidence: 99%

The Lactate Minimum Test: Concept, Methodological Aspects and Insights for Future Investigations in Human and Animal Models

et al. 2017

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In 1993, Uwe Tegtbur proposed a useful physiological protocol named the lactate minimum test (LMT). This test consists of three distinct phases. Firstly, subjects must perform high intensity efforts to induce hyperlactatemia (phase 1). Subsequently, 8 min of recovery are allowed for transposition of lactate from myocytes (for instance) to the bloodstream (phase 2). Right after the recovery, subjects are submitted to an incremental test until exhaustion (phase 3). The blood lactate concentration is expected to fall during the first stages of the incremental test and as the intensity increases in subsequent stages, to rise again forming a “U” shaped blood lactate kinetic. The minimum point of this curve, named the lactate minimum intensity (LMI), provides an estimation of the intensity that represents the balance between the appearance and clearance of arterial blood lactate, known as the maximal lactate steady state intensity (iMLSS). Furthermore, in addition to the iMLSS estimation, studies have also determined anaerobic parameters (e.g., peak, mean, and minimum force/power) during phase 1 and also the maximum oxygen consumption in phase 3; therefore, the LMT is considered a robust physiological protocol. Although, encouraging reports have been published in both human and animal models, there are still some controversies regarding three main factors: (1) the influence of methodological aspects on the LMT parameters; (2) LMT effectiveness for monitoring training effects; and (3) the LMI as a valid iMLSS estimator. Therefore, the aim of this review is to provide a balanced discussion between scientific evidence of the aforementioned issues, and insights for future investigations are suggested. In summary, further analyses is necessary to determine whether these factors are worthy, since the LMT is relevant in several contexts of health sciences.

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Section: Can the Lmt Be Influenced By Methodological Aspects?mentioning

confidence: 99%

The Lactate Minimum Test: Concept, Methodological Aspects and Insights for Future Investigations in Human and Animal Models

et al. 2017

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“…The maximal lactate steady state (MLSS) is considered a physiological benchmark for the evaluation and prescription of endurance training intensities 1 . A method used to estimate MLSS is the blood lactate concentrations (BLa) 2 , called lactate threshold (LT), determined at the highest constant workload, in which during a maximal incre-mental protocol 3 is achieved a maximum balance between lactate production and their clearance rates in the blood [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Comparison of methods to determine the lactate threshold during leg press exercise in long-distance runners

Campos

Vianna

Guimarães

et al. 2020

Motriz: rev. educ. fis.

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To determine lactate threshold (LT) by three different methods (visual inspection, algorithmic adjustment, and Dmax) during an incremental protocol performed in the leg press 45°and to evaluate correlation and agreement among these different methods. Methods: Twenty male long-distance runners participated in this study.Firstly, participants performed the dynamic force tests in one-repetition maximum (1RM). In the next session, completed an incremental protocol consisted of progressive stages of 1 min or 20 repetitions with increments of 10, 20, 25, 30, 35, and 40% 1RM. From 40% 1RM, increments corresponding to 10% 1RM were performed until a load in which the participants could not complete the 20 repetitions. A rest interval of 2 min was observed between each stage for blood collection and adjustment of the workloads for the next stage. Results: Our results showed no significant difference in relative load (% 1RM), good correlations, and high intraclass correlation coefficients (ICC) between algorithmic adjustment and Dmax (p = 0.680, r = 0.92; ICC = 0.959), algorithmic adjustment and visual inspection (p = 0.266, r = 0.91; ICC = 0.948), and Dmax and visual inspection (p = 1.000, r = 0.88; ICC = 0.940). In addition, the Bland-Altman plot and linear regression showed agreement between algorithmic adjustment and Dmax (r 2 = 0.855), algorithmic adjustment and visual inspection (r 2 = 0.834), and Dmax and visual inspection (r 2 = 0.781). Conclusion: The good correlation and high agreement among three methods suggest their applicability to determine LT during an incremental protocol performed in the leg press 45°. However, the best agreement found between mathematical methods suggests better accuracy.

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“…This practical application of CS can be observed most commonly in swimming, where the calculation of CS is frequently utilized for youth training and performance [7,[11][12][13]. Application can also be found, although infrequent, in other sports e.g., running [14].…”

Section: Introductionmentioning

confidence: 99%

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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Critical velocity estimates lactate minimum velocity in youth runners

Cited by 4 publications

References 39 publications

The Lactate Minimum Test: Concept, Methodological Aspects and Insights for Future Investigations in Human and Animal Models

The Lactate Minimum Test: Concept, Methodological Aspects and Insights for Future Investigations in Human and Animal Models

Comparison of methods to determine the lactate threshold during leg press exercise in long-distance runners

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

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