scholarly journals Comienzo de la acumulación de lactato sanguíneo como predictor del rendimiento en atletas de élite (Onset of blood lactate accumulation as a predictor of performance in top athletes)

Retos ◽  
2015 ◽  
pp. 67-69
Author(s):  
Jordan Santos-Concejero ◽  
Cristina Granados ◽  
Iraia Bidaurrazaga-Letona ◽  
Jon Zabala-Lili ◽  
Jon Irazusta ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Long Distance ◽  
Running Performance ◽  
Lactate Accumulation ◽  
Physiological Variables ◽  
Long Distance Running ◽  
Blood Lactate Accumulation ◽  
Para Determinar ◽  
Trained Runners

El objetivo principal de este estudio fue investigar si el comienzo de la acumulación de lactato en sangre (VOBLA) es un buen predictor del rendimiento de mediofondo y fondo en atletas entrenados. Veintidós corredores tomaron parte en este estudio. Todos completaron un test máximo incremental en tapiz rodante para determinar los parámetros fisiológicos máximos así como la VOBLA. Se analizaron las relaciones entre la VOBLA y el ritmo de carrera de 10 km (V10K) y 3 km (V3K). La VOBLA fue de 17.7 ± 1.2 km·h-1 y las V10K y V3K fueron 21.1 ± 0.7 km·h-1 y 19.0 ± 0.8 km·h-1, respectivamente. Se encontró una correlación lineal significativa entre la VOBLA y V10K (r = 0.761, P < 0.05) y entre VOBLA y V3K (r = 0.561, P < 0.05). Estos resultados indican que la VOBLA está altamente asociada al rendimiento de la carrera de acuerdo a V10K yV3K en atletas entrenados.Palabras clave: Resistencia, OBLA, correlación, carrera a pie.Abstract: The main purpose of this study was to investigate whether the onset of blood lactate accumulation velocity (VOBLA) is a good predictor of middle- and long-distance running performance in well-trained endurance runners. Twenty-two well-trained runners participated in this study. All participants completed a incremental test on a treadmill to determine maximal physiological variables the VOBLA (4 mmol·L-1 of lactate concentration). The relationships between VOBLA and the best 10-km (V10K) and 3-km (V3K) race pace were analyzed. The velocity for VOBLA was 17.7 ± 1.2 km·h-1 and the velocities for V10K and V3K were 21.1 ± 0.7 km·h-1 and 19.0 ± 0.8 km·h-1, respectively. A positive linear relationship was found between VOBLA and V10K (r = 0.761, P < 0.05) and between VOBLA and V3K (r = 0.561,P < 0.05). These results indicate that VOBLA is highly associated to running performance according to V10K and V3K in well-trained runners.Key words: Endurance, OBLA, correlation, running.

scholarly journals Prediction of race pace in long distance running from blood lactate concentration around race pace

2012 ◽  
Vol 7 (4) ◽  
pp. 763-769 ◽  
Author(s):  
Iker Muñoz Perez ◽  
Diego Moreno Perez ◽  
Claudia Cardona Gonzalez ◽  
Jonathan Esteve-Lanao
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Distance Running ◽  
Long Distance ◽  
Long Distance Running

scholarly journals Drafting’s Improvement of 3000-m Running Performance in Elite Athletes: Is It a Placebo Effect?

2015 ◽  
Vol 10 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Hassane Zouhal ◽  
Abderraouf Ben Abderrahman ◽  
Jacques Prioux ◽  
Beat Knechtle ◽  
Lotfi Bouguerra ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Psychological Effects ◽  
Rating Of Perceived Exertion ◽  
Distance Runners ◽  
Long Distance ◽  
Running Performance ◽  
Maximal Aerobic Speed ◽  
Trained Runners

Purpose:To determine the effect of drafting on running time, physiological response, and rating of perceived exertion (RPE) during 3000-m track running.Methods:Ten elite middle- and long-distance runners performed 3 track-running sessions. The 1st session determined maximal oxygen uptake and maximal aerobic speed using a lightweight ambulatory respiratory gasexchange system (K4B2). The 2nd and the 3rd tests consisted of nondrafting 3000-m running (3000-mND) and 3000-m running with drafting for the 1st 2000 m (3000-mD) performed on the track in a randomized counterbalanced order.Results:Performance during the 3000-mND (553.59 ± 22.15 s) was significantly slower (P < .05) than during the 3000-mD (544.74 ± 18.72 s). Cardiorespiratory responses were not significantly different between the trials. However, blood lactate concentration was significantly higher (P < .05) after the 3000-mND (16.4 ± 2.3 mmol/L) than after the 3000-mD (13.2 ± 5.6 mmol/L). Athletes perceived the 3000-mND as more strenuous than the 3000-mD (P < .05) (RPE = 16.1 ± 0.8 vs 13.1 ± 1.3). Results demonstrate that drafting has a significant effect on performance in highly trained runners.Conclusion:This effect could not be explained by a reduced energy expenditure or cardiorespiratory effort as a result of drafting. This raises the possibility that drafting may aid running performance by both physiological and nonphysiological (ie, psychological) effects.

scholarly journals The Acute Effect of Hyperoxia on Onset of Blood Lactate Accumulation (OBLA) and Performance in Female Runners during the Maximal Treadmill Test

2021 ◽  
Vol 18 (9) ◽  
pp. 4546
Author(s):  
Thays C. Silva ◽  
Felipe J. Aidar ◽  
Aristela de Freitas Zanona ◽  
Dihogo Gama Matos ◽  
Danielle D. Pereira ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Acute Effect ◽  
Treadmill Test ◽  
Borg Scale ◽  
Lactate Accumulation ◽  
Cohen’S D ◽  
Oxygen Inhalation ◽  
Blood Lactate Accumulation ◽  
Cohen's D

The objective of this study was to analyze the acute effect of hyperoxia during the maximal treadmill test (MTT) of runners. Participants included 10 female street runners who performed the MTT under two different conditions: hyperoxia (HYPX), inhaling oxygen (60% O2) every 3 min; and normoxia (NORM), without additional oxygen inhalation. Both groups performed the MTT with increases in the slope of the run every 3 min until voluntary exhaustion. The variables of lactate concentration, the onset of blood lactate accumulation (OBLA), peripheral oxygen saturation (SpO2), heart rate (HR), and Borg scale were evaluated. It was verified after the comparison (HYPX vs. NORM) that stage 3 (p = 0.012, Cohen’s d = 1.76) and stage 4 (p < 0.001; Cohen’s d = 5.69) showed a reduction in lactate under the HYPX condition. OBLA under the HYPX condition was identified at a later stage than NORM. There were no differences in Borg scale, SpO2, and HR between the different conditions. It was concluded that the HYPX condition contributed to a reduction in lactate concentration and delayed OBLA in runners.

scholarly journals Blood lactate accumulation and muscle deoxygenation during incremental exercise

1999 ◽  
Vol 87 (1) ◽  
pp. 348-355 ◽  
Author(s):  
Bruno Grassi ◽  
Valentina Quaresima ◽  
Claudio Marconi ◽  
Marco Ferrari ◽  
Paolo Cerretelli
Keyword(s):  
Blood Lactate ◽  
Continuous Wave ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Incremental Exercise ◽  
Vastus Lateralis Muscle ◽  
Lactate Accumulation ◽  
Muscle Deoxygenation ◽  
Blood Lactate Accumulation ◽  
Concentration Changes

Near-infrared spectroscopy (NIRS) could allow insights into controversial issues related to blood lactate concentration ([La]b) increases at submaximal workloads (w˙). We combined, on five well-trained subjects [mountain climbers; peak O2 consumption (V˙o 2peak), 51.0 ± 4.2 (SD) ml ⋅ kg−1 ⋅ min−1] performing incremental exercise on a cycle ergometer (30 W added every 4 min up to voluntary exhaustion), measurements of pulmonary gas exchange and earlobe [La]b with determinations of concentration changes of oxygenated Hb (Δ[O2Hb]) and deoxygenated Hb (Δ[HHb]) in the vastus lateralis muscle, by continuous-wave NIRS. A “point of inflection” of [La]b vs.w˙ was arbitrarily identified at the lowest [La]b value which was >0.5 mM lower than that obtained at the following w˙. Total Hb volume (Δ[O2Hb + HHb]) in the muscle region of interest increased as a function ofw˙ up to 60–65% ofV˙o 2 peak, after which it remained unchanged. The oxygenation index (Δ[O2Hb − HHb]) showed an accelerated decrease from 60– 65% ofV˙o 2 peak. In the presence of a constant total Hb volume, the observed Δ[O2Hb − HHb] decrease indicates muscle deoxygenation (i.e., mainly capillary-venular Hb desaturation). The onset of muscle deoxygenation was significantly correlated ( r 2 = 0.95; P < 0.01) with the point of inflection of [La]bvs. w˙, i.e., with the onset of blood lactate accumulation. Previous studies showed relatively constant femoral venous[Formula: see text] levels at w˙ higher than ∼60% of maximal O2consumption. Thus muscle deoxygenation observed in the present study from 60–65% ofV˙o 2 peak could be attributed to capillary-venular Hb desaturation in the presence of relatively constant capillary-venular[Formula: see text] levels, as a consequence of a rightward shift of the O2Hb dissociation curve determined by the onset of lactic acidosis.

scholarly journals Running Economy and Blood Lactate Accumulation in Elite Football Players with High and Low Maximal Aerobic Power

2015 ◽  
Vol 6 (1) ◽  
pp. 42-49 ◽  
Author(s):  
Johnny Nilsson ◽  
Daniele Cardinale
Keyword(s):  
Oxygen Uptake ◽  
Blood Lactate ◽  
Maximal Oxygen Uptake ◽  
Aerobic Power ◽  
Lactate Concentration ◽  
Running Economy ◽  
Football Players ◽  
Lactate Accumulation ◽  
Power Group ◽  
Blood Lactate Accumulation

Abstract The purpose was to determine running economy and lactate threshold among a selection of male elite football players with high and low aerobic power. Forty male elite football players from the highest Swedish division (“Allsvenskan”) participated in the study. In a test of running economy (RE) and blood lactate accumulation the participants ran four minutes each at 10, 12, 14, and 16 km•h−1 at horizontal level with one minute rest in between each four minutes interval. After the last sub-maximal speed level the participants got two minutes of rest before test of maximal oxygen uptake (VO2max). Players that had a maximal oxygen uptake lower than the average for the total population of 57.0 mL O2•kg−1•minute−1 were assigned to the low aerobic power group (LAP) (n=17). The players that had a VO2max equal to or higher than 57.0 mL O2•kg−1•minute−1 were selected for the high aerobic power group (HAP) (n=23). The VO2max was significantly different between the HAP and LAP group. The average RE, measured as oxygen uptake at 12, 14 and 16km•h−1 was significantly lower but the blood lactate concentration was significantly higher at 14 and 16 km•h−1 for the LAP group compared with the HAP group.

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