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"Maximal lactate steady state"

Jan Boone, Kristof Vandekerckhove, Ilse Coomans, Fabrice Prieur, Jan G Bourgois
In the past two decades oxygenation responses to incremental ramp exercise, measured non-invasively by means of near-infrared spectroscopy at different locations in the body, have advanced the insights on the underpinning mechanisms of the whole-body pulmonary oxygen uptake ([Formula: see text]) response. In healthy subjects the complex oxygenation responses at the level of locomotor and respiratory muscles, and brain were simplified and quantified by the detection of breakpoints as a deviation in the ongoing response pattern as work rate increases...
September 9, 2016: European Journal of Applied Physiology
Thomas Hauser, Jennifer Adam, Henry Schulz
No abstract text is available yet for this article.
2016: Theoretical Biology & Medical Modelling
Jailton Gregório Pelarigo, Camila Coelho Greco, Benedito Sérgio Denadai, Ricardo Jorge Fernandes, João Paulo Vilas-Boas, David Robert Pendergast
Our purpose was to examine the swimming biophysical responses at velocities (v) of 97.5, 100 and 102.5% of the maximal lactate steady state (MLSS). Ten elite female swimmers performed three-to-five 30-min constant tests at imposed paces to determine 97.5, 100 and 102.5%MLSS v. Gas exchange, blood lactate concentration ([La-]), stroke rate (SR) and v were determined during each test. The v values at 97.5, 100 and 102.5%MLSS were 1.21±0.07, 1.24±0.07 and 1.27±0.07m.s(-1), respectively. Oxygen uptake (V̇O2) and Pulmonary ventilation (V̇E) increased as function of v...
October 2016: Human Movement Science
Bibiano Madrid, Flávio Oliveira Pires, Jonato Prestes, Denis César Leite Vieira, Tyler Clark, Eduard Tiozzo, John E Lewis, Carmen S Grubert Campbell, Herbert Gustavo Simões
The maximal lactate steady state is the gold standard for evaluating aerobic capacity; however, it is time-consuming. The lactate minimum protocol is an easier alternative, but is not feasible and still expensive. This study investigated whether the rating of perceived exertion of 13 is an accurate predictor of lactate minimum and maximal lactate steady state intensities. Eleven physically active men performed three tests: (1) incremental exercise with workloads based on rating of perceived exertion of 10, 13, and 16 (experimental protocol - denominated RPE-13 test), (2) lactate minimum, and (3) maximal lactate steady state...
February 2016: Perceptual and Motor Skills
Ralph Beneke, Renate M Leithäuser
The maximal lactate steady state (MLSS) depicts the highest blood lactate concentration (BLC) that can be maintained over time without a continual accumulation at constant prolonged workload. In cycling, no difference in the MLSS was combined with lower power output related to peak workload (IMLSS) at 100 than at 50 revolutions per minute (RPM). MLSS coincides with a respiratory exchange ratio (RER) close to 1. Recently, at incremental exercise, an RER of 1 was found at similar workload and similar intensity but higher BLC at 100 compared with 50RPM...
June 1, 2016: International Journal of Sports Physiology and Performance
Clévia Santos Passos, Rosemara Silva Ribeiro, Thiago Santos Rosa, Rodrigo Vanerson Passos Neves, Fernando Costa, Milton Ginoza, Mirian Aparecida Boim
INTRODUCTION: Phalaris canariensis L. (Pc), known as birdseed, is rich in tryptophan. The aqueous extract of Pc (AEPc) treatment reduced systolic blood pressure (SBP) in spontaneously hypertensive rats (SHR) via mechanisms mediated by the tryptophan metabolizing enzyme indoleamine 2,3-dioxygenase (IDO). Hypertension is a risk factor to cardiovascular and renal diseases. Considering that physical exercise improves hypertension and cardiovascular function, the aim of this study was to evaluate whether the benefits of exercise (Ex) would be enhanced by concomitant AEPc treatment (400 mg·kg·d p...
October 2016: Medicine and Science in Sports and Exercise
Thiago S Rosa, Herbert G Simões, Marcelo M Rogero, Milton R Moraes, Benedito S Denadai, Ricardo M Arida, Marília S Andrade, Bruno M Silva
Severe obesity affects metabolism with potential to influence the lactate and glycemic response to different exercise intensities in untrained and trained rats. Here we evaluated metabolic thresholds and maximal aerobic capacity in rats with severe obesity and lean counterparts at pre- and post-training. Zucker rats (obese: n = 10, lean: n = 10) were submitted to constant treadmill bouts, to determine the maximal lactate steady state, and an incremental treadmill test, to determine the lactate threshold, glycemic threshold and maximal velocity at pre and post 8 weeks of treadmill training...
2016: Frontiers in Physiology
I Llodio, E M Gorostiaga, I Garcia-Tabar, C Granados, L Sánchez-Medina
This study aimed to predict the velocity corresponding to the maximal lactate steady state (MLSSV) from non-invasive variables obtained during a maximal multistage running field test (modified University of Montreal Track Test, UMTT), and to determine whether a single constant velocity test (CVT), performed several days after the UMTT, could estimate the MLSSV. Within 4-5 weeks, 20 male runners performed: 1) a modified UMTT, and 2) several 30 min CVTs to determine MLSSV to a precision of 0.25 km·h(-1)...
June 2016: International Journal of Sports Medicine
Joshua Christen, Carl Foster, John P Porcari, Richard P Mikat
PURPOSE: The session RPE (sRPE) has gained popularity as a "user friendly" method for evaluating internal training load. sRPE has historically been obtained 30-min following exercise. This study evaluated the effect of post-exercise measurement time on sRPE following steady-state and interval cycle exercise. METHODS: Well-trained subjects (N=15) (VO2max=51+4 & 36+4 (cycle ergometer) for men & women, respectively) completed counterbalanced 30-min steady-state and interval training bouts...
March 21, 2016: International Journal of Sports Physiology and Performance
Iñaki Arratibel-Imaz, Julio Calleja-González, Jose Ignacio Emparanza, Nicolas Terrados, Jeffrey M Mjaanes, Sergej M Ostojic
INTRODUCTION: The calculation of exertion intensity, in which a change is produced in the metabolic processes which provide the energy to maintain physical work, has been defined as the anaerobic threshold (AT). The direct calculation of maximal lactate steady state (MLSS) would require exertion intensities over a long period of time and with sufficient rest periods which would prove significantly difficult for daily practice. Many protocols have been used for the indirect calculation of MLSS...
2016: Physician and Sportsmedicine
I Llodio, I Garcia-Tabar, L Sánchez-Medina, J Ibáñez, E M Gorostiaga
This study aimed to predict the velocity corresponding to the maximal lactate steady state (MLSS(V)) from non-invasive variables obtained during an incremental maximal running test (University of Montreal Track Test, UMTT) and to determine whether a single constant velocity test (CVT), performed several days after the UMTT, could estimate the MLSS(V). During a period of 3 weeks, 20 male junior soccer players performed: (1) a UMTT, and (2) several 20-min CVTs to determine MLSS(V) to a precision of 0.35 km·h(-1)...
December 2015: International Journal of Sports Medicine
Rogério Santos de Oliveira Cruz, Rafael Alves de Aguiar, Tiago Turnes, Luiz Guilherme Antonacci Guglielmo, Ralph Beneke, Fabrizio Caputo
This study analyzed the effects of caffeine intake on whole-body substrate metabolism and exercise tolerance during cycling by using a more individualized intensity for merging the subjects into homogeneous metabolic responses (the workload associated with the maximal lactate steady state-MLSS). MLSS was firstly determined in eight active males (25 ± 4 years, 176 ± 7 cm, 77 ± 11 kg) using from two to four constant-load tests of 30 min. On two following occasions, participants performed a test until exhaustion at the MLSS workload 1 h after taking either 6 mg/kg of body mass of caffeine or placebo (dextrose), in a randomized, double-blinded manner...
July 2015: Nutrients
J Adam, M Öhmichen, E Öhmichen, J Rother, U M Müller, T Hauser, H Schulz
Complex performance diagnostics in sports medicine should contain maximal aerobic and maximal anaerobic performance. The requirements on appropriate stress protocols are high. To validate a test protocol quality criteria like objectivity and reliability are necessary. Therefore, the present study was performed in intention to analyze the reliability of maximal lactate production rate ([Formula: see text]Lamax) by using a sprint test, maximum oxygen consumption ([Formula: see text]O2max) by using a ramp test and, based on these data, resulting power in calculated maximum lactate-steady-state (PMLSS) especially for amateur cyclists...
June 2015: Biology of Sport
Paulo E DE Assis Pereira, Vitor K Piubelli Carrara, Gustavo Mello Rissato, João M Pereira Duarte, Ricardo L Fernandes Guerra, Paulo H Silva Marques DE Azevedo
BACKGROUND: The aim of this study was to investigate the use of the Heart Rate Deflection Point Test (HRDP) in the determination of the velocity at the Maximal Lactate Steady State (MLSS). METHODS: Fifteen untrained male participants took part in a 3000-m running performance on a 400-m track. The volunteers performed an incremental test for HRDP determination. The third test was constant velocity, which lasted around 30 minutes and was based around HRDP for MLSS determination...
May 2016: Journal of Sports Medicine and Physical Fitness
Bernardo A Petriz, Jeeser A Almeida, Clarissa P C Gomes, Carlos Ernesto, Rinaldo W Pereira, Octavio L Franco
BACKGROUND: Exercise is a non-pharmacologic agent widely used for hypertension control, where low intensity is often associated with blood pressure reduction. Maximal lactate steady state (MLSS) was recently identified in spontaneously hypertensive rats (SHRs) as an important step in establishing secure intensities for prescribing exercise for hypertensive phenotypes. Here we verified the effects of training around MLSS, 20% below MLSS, and 15% above MLSS on aerobic fitness and blood pressure status of SHR...
2015: BMC Physiology
Daniel A Keir, Federico Y Fontana, Taylor C Robertson, Juan M Murias, Donald H Paterson, John M Kowalchuk, Silvia Pogliaghi
UNLABELLED: Critical power (CP), respiratory compensation point (RCP), maximal lactate steady state (MLSS), and deoxyhemoglobin breakpoint ([HHb]BP) are alternative functional indices that are thought to demarcate the highest exercise intensity that can be tolerated for long durations. PURPOSE: We tested the hypothesis that CP, RCP, MLSS, and [HHb]BP occur at the same metabolic intensity by examining the pulmonary oxygen uptake (V˙)O2p and power output (PO) associated with each "threshold...
September 2015: Medicine and Science in Sports and Exercise
G G de Araujo, C A Gobatto, F de Barros Manchado-Gobatto, L Fm Teixeira, I Gm Dos Reis, L C Caperuto, M Papoti, S Bordin, C R Cavaglieri, R Verlengia
We evaluate the mRNA expression of monocarboxylate transporters 1 and 4 (MCT1 and MCT4) in skeletal muscle (soleus, red and white gastrocnemius), heart and liver tissues in mice submitted to a single bout of swimming exercise at the maximal lactate steady state workload (MLSSw). After 72 h of MLSS test, the animals were submitted to a swimming exercise session for 25 min at individual MLSSw. Tissues and muscle samples were obtained at rest (control, n=5), immediately (n=5), 5 h (n=5) and 10 h (n=5) after exercise for determination of the MCT1 and MCT4 mRNA expression (RT-PCR)...
2015: Physiological Research
Lucieli T Cambri, Carla Ribeiro, José D Botezelli, Ana C Ghezzi, Maria Ar Mello
BACKGROUND: The objective was to evaluate the muscle glucose metabolism in rats fed a fructose-rich diet after fetal protein malnutrition, at rest and after acute physical exercise at maximal lactate steady-state intensity. METHODS: The male offspring born of mothers fed on a balanced or low-protein diet were split in four groups until 60 days: Balanced (B): balanced diet during the whole period; Balanced/Fructose (BF): balanced diet in utero and fructose-rich diet after birth; Low protein/Balanced (LB): low-protein diet in utero and balanced diet after birth; Low protein/Fructose (LF): low protein diet in utero and fructose-rich diet after birth...
2014: Diabetology & Metabolic Syndrome
Paulo Henrique Silva Marques de Azevedo, Tania Pithon-Curi, Alessandro Moura Zagatto, João Oliveira, Sérgio Perez
BACKGROUND: the purpose of this study was to verify the validity of respiratory compensation threshold (RCT) measured during a new single judo specific incremental test (JSIT) for aerobic demand evaluation. METHODS: to test the validity of the new test, the JSIT was compared with Maximal Lactate Steady State (MLSS), which is the gold standard procedure for aerobic demand measuring. Eight well-trained male competitive judo players (24.3 ± 7.9 years; height of 169...
April 2014: Muscles, Ligaments and Tendons Journal
Pedro Figueiredo, Rafael Nazario, Marisa Sousa, Jailton Gregório Pelarigo, João Paulo Vilas-Boas, Ricardo Fernandes
The purpose of this study was to conduct a kinematical analysis during swimming at the intensity corresponding to maximal lactate steady state (MLSS). Thirteen long distance swimmers performed, in different days, an intermittent incremental protocol of n x 200 m until exhaustion and two to four 30-min submaximal constant speed bouts to determine the MLSS. The video analysis, using APAS System (Ariel Dynamics Inc., USA), allowed determining the following relevant swimming determinants (in five moments of the 30-min test: 0, 25, 50, 75, and 100%): stroke rate, stroke length, trunk incline, intracyclic velocity variation, propelling efficiency, index of coordination and the time allotted to propulsion per distance unit...
September 2014: Journal of Sports Science & Medicine
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