Validation of a Single-Day Maximal Lactate Steady State Assessment Protocol in Trained Runners

Kuphal, Karen E.; Potteiger, Jeffrey A.; Hise, M P.; Frey, Bruce B.; Acosta, J M.

doi:10.1097/00005768-200105001-01374

Cited by 4 publications

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“…In addition, V90 was a strong ( r = 0.85–0.89) predictor of FBLC thresholds. These findings are in close agreement with previous HR-based studies in professional team-sport players (Garcia-Tabar et al, 2015b ), elite Basque-ball players (Garcia-Tabar et al, 2017 ) and low-level ( V MLSS ≈13.6 km·h −1 ) endurance runners (Kuphal et al, 2004 ) in which V90 was largely associated with V MLSS (Kuphal et al, 2004 ) and FBLC thresholds (Garcia-Tabar et al, 2015b , 2017 ). The relevance of V90 as a bloodless predictor of BL R Ts is strengthened by (1) the relationship between V90 and BL R Ts is quite stable despite alterations in BL R Ts due to training, detraining or hypoxia (Hurley et al, 1984 ; Foster et al, 1999 ; Friedmann et al, 2004 ); (2) increases in V90 have been verified to predict longitudinal training-induced improvements in FBLC thresholds (Garcia-Tabar et al, 2017 ); and (3) V90 is determinable during a submaximal test, i.e., maximal exertion is not always necessary (Garcia-Tabar et al, 2017 ), what makes V90 sometimes more suitable than PTV and

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Section: Discussionsupporting

confidence: 92%

A “Blood Relationship” Between the Overlooked Minimum Lactate Equivalent and Maximal Lactate Steady State in Trained Runners. Back to the Old Days?

Garcia‐Tabar

Gorostiaga

2018

Front. Physiol.

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Maximal Lactate Steady State (MLSS) and Lactate Threshold (LT) are physiologically-related and fundamental concepts within the sports and exercise sciences. Literature supporting their relationship, however, is scarce. Among the recognized LTs, we were particularly interested in the disused “Minimum Lactate Equivalent” (LEmin), first described in the early 1980s. We hypothesized that velocity at LT, conceptually comprehended as in the old days (LEmin), could predict velocity at MLSS (VMLSS) more accurate than some other blood lactate-related thresholds (BLRTs) routinely used nowadays by many sport science practitioners. Thirteen male endurance-trained [VMLSS 15.0 ± 1.1 km·h−1; maximal oxygen uptake (trueV.O2max) 67.6 ± 4.1 ml·kg−1·min−1] homogeneous (coefficient of variation: ≈7%) runners conducted 1) a submaximal discontinuous incremental running test to determine several BLRTs followed by a maximal ramp incremental running test for trueV.O2max determination, and 2) several (4–5) constant velocity running tests to determine VMLSS with a precision of 0.20 km·h−1. Determined BLRTs include LEmin and LEmin-related LEmin plus 1 (LEmin+1mM) and 1.5 mmol·L−1 (LEmin+1.5mM), along with well-established BLRTs such as conventionally-calculated LT, Dmax and fixed blood lactate concentration thresholds. LEmin did not differ from LT (P = 0.71; ES: 0.08) and was 27% lower than MLSS (P < 0.001; ES: 3.54). LEmin+1mM was not different from MLSS (P = 0.47; ES: 0.09). LEmin was the best predictor of VMLSS (r = 0.91; P < 0.001; SEE = 0.47 km·h−1), followed by LEmin+1mM (r = 0.86; P < 0.001; SEE = 0.58 km·h−1) and LEmin+1.5mM (r = 0.84; P < 0.001; SEE = 0.86 km·h−1). There was no statistical difference between MLSS and estimated MLSS using LEmin prediction formula (P = 0.99; ES: 0.001). Mean bias and limits of agreement were 0.00 ± 0.45 km·h−1 and ±0.89 km·h−1. Additionally, LEmin, LEmin+1mM and LEmin+1.5mM were the best predictors of trueV.O2max (r = 0.72–0.79; P < 0.001). These results support LEmin, an objective submaximal overlooked and underused BLRT, to be one of the best single MLSS predictors in endurance trained runners. Our study advocates factors controlling LEmin to be shared, at least partly, with those controlling MLSS.

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.…”

Section: Discussionsupporting

confidence: 92%

A “Blood Relationship” Between the Overlooked Minimum Lactate Equivalent and Maximal Lactate Steady State in Trained Runners. Back to the Old Days?

Garcia‐Tabar

Gorostiaga

2018

Front. Physiol.

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“…One test that has received attention recently is that of Palmer et al (23). This single-visit test utilizes the responses of HR, breathing rate, and rating of perceived exertion to exercise, along with an estimation of current race pace, to estimate the MLSS, and has been shown to provide an acceptable estimate of the MLSS in approximately 75% of participants (21,23). However, the requirement for an accurate estimation of current race pace limits the test to use with athletes, and even in this population the MLSS cannot be estimated accurately in a sizeable minority of participants.…”

Section: Discussionmentioning

confidence: 99%

Validity of a Single-Visit Protocol to Estimate the Maximum Lactate Steady State

Kilding

Jones

2005

Medicine &Amp; Science in Sports &Amp; Exercise

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“…To establish lactate curves (blood lactate concentration as a function of running speed) and the MLSS we used the classic MLSS assessment protocol which measures the MLSS over the course of several days as described by Ferreira et al [7], as opposed to the Palmer method [19,27,28].…”

Section: Methodsmentioning

confidence: 99%

Reliability of blood lactate as a measure of exercise intensity in different strains of mice during forced treadmill running

Lønbro¹,

Wiggins²,

Wittenborn³

et al. 2019

PLoS ONE

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Exercise has long been known to be beneficial to human health. Studies aimed at understanding the effects of exercise specifically focus on predetermined exercise intensities defined by measuring the aerobic capacity of each individual. Many disease models involving animal training often establish aerobic capacity by using the maximal lactate steady state (MLSS), a widely used method in humans that has frequently been used in rodent studies. The MLSS is defined as the highest exercise intensity at which blood lactate concentration remains constant and is roughly equivalent to 70–80% of maximal aerobic capacity. Due to our up-coming experiments investigating the effect of different exercise intensities in specific strains of tumor-bearing mice, the aim of the present study was to determine the MLSS in athymic nude (NCr nu/nu and NMRI), CDF1, and C3H mice by treadmill running at increasing speeds. However, despite thorough exercise acclimation and the use of different exercise protocols and aversive stimuli, less than half of the experiments across strains pointed towards an established MLSS. Moreover, gently prodding the mice during low to moderate intensity running caused a 30–121% (p<0.05) increase in blood lactate concentration compared to running without stimulation, further questioning the use of lactate as a measure of exercise intensity. Overall, MLSS is difficult to determine and large variations of blood lactate levels were observed depending on the exercise protocol, mice handling strategy and strain. This should be considered when planning experiments in mice using forced exercise protocols.

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Validation of a Single-Day Maximal Lactate Steady State Assessment Protocol in Trained Runners

Cited by 4 publications

References 0 publications

A “Blood Relationship” Between the Overlooked Minimum Lactate Equivalent and Maximal Lactate Steady State in Trained Runners. Back to the Old Days?

A “Blood Relationship” Between the Overlooked Minimum Lactate Equivalent and Maximal Lactate Steady State in Trained Runners. Back to the Old Days?

Validity of a Single-Visit Protocol to Estimate the Maximum Lactate Steady State

Reliability of blood lactate as a measure of exercise intensity in different strains of mice during forced treadmill running

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