scholarly journals La privación de sueño no afecta la resistencia aeróbica ni la concentración de lactato en sangre de jóvenes deportistas (Sleep deprivation does not affect aerobic resistance or blood lactate concentration of young athletes)

Retos ◽  
2018 ◽  
pp. 221-223
Author(s):  
Jorge Alberto Aburto Corona ◽  
Tatiana Miranda Núñez ◽  
Alicia Bárcenas Ugalde ◽  
Roberto Espinoza Gutiérrez ◽  
Emilio Manuel Arrayales Millán
Keyword(s):  
Sleep Deprivation ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Aerobic Performance ◽  
Control Group ◽  
Experimental Conditions ◽  
Male Athletes ◽  
Physical Test ◽  
Significant Difference

El objetivo de este estudio fue determinar si la resistencia aeróbica y la concentración de lactato en sangre, pueden ser influenciados por la privación parcial o total del sueño en un grupo de deportistas. Se reclutaron 13 deportistas masculinos (21.8 ± 2.9 años de edad) los cuales fueron sometidos a tres condiciones experimentales: dormir cuatro horas (D4H), no dormir (0H) y una condición contol de dormir ocho horas (D8H). No se encontraron diferencias estadísticamente significativas en la resistencia aeróbica (p=.845). De la misma manera, no se halló diferencia significativa en la concentración de lactato en sangre (p>.05). Estos resultados señalan que la privación parcial (dormir cuatro horas) o total (no dormir) del sueño, previo a una prueba física, no es un factor que influya en el rendimiento aeróbico ni en la concentración de lactato en sangre en comparación a la cantidad de horas de sueño recomendadas (dormir ocho horas).Abstract. The purpose of this study was to determinate if aerobic performance and blood lactate concentration are influenced by partial or total sleep deprivation. Thirteen male athletes (age: 21.8 ± 2.9 y.o) were randomly assigned to three experimental conditions: sleep four hours (D4H), no sleep (0H), and sleep eigth hours (D8H, control group). No significant difference was found in the aerobic performance (p=.845). Similarly, there was no sifnificant difference in blood lactate concentration (p>.05). This results suggest that partial (sleep four hours) or total (no sleep) sleep deprivation before a physical test are not a factor influencing aerobic performance or blood lactate concentration compared to the amount of recommended hours of sleep (sleep eight hours).

scholarly journals Physiological and Competitive Characteristics of Professional Female Futsal Players

2021 ◽  
Vol 21 (1) ◽  
pp. 19-25
Author(s):  
Tommy Apriantono ◽  
Samsul Bahri ◽  
Sri Ihsani Indah ◽  
Bagus Winata
Keyword(s):  
Perceived Exertion ◽  
Lactate Concentration ◽  
Anaerobic Capacity ◽  
Blood Lactate Concentration ◽  
Aerobic Performance ◽  
Anaerobic Performance ◽  
Mean Power ◽  
Significant Difference ◽  
Post Test ◽  
Training Team

The study purpose was to examine the anaerobic and aerobic performance and also determine the influence of the anaerobic performance on specific movements during a match-play.   Materials and methods. A total of 12 Indonesian professional female players from Bandung district female futsal club were recruited and enrolled to participate in this study. They were required to complete one familiarization and two experimental sessions. During the first session (laboratory test), all players performed a treadmill test to ascertain their maximum rate of oxygen consumption (VO2max) and a running-based anaerobic sprint test (RAST) to measure their anaerobic performance. For the second session (on-court test), the participants played a simulated match on the court. A training team of 5 experts carried out an investigation regarding each player’s competitive performance per match. Furthermore, the blood lactate concentration and Rate of Perceived Exertion (RPE) were assessed in the pre- and post-test for both sessions, which were separated by a week to enable the players to recover. Results. The results showed that there was no significant difference between the mean power (MP) and fatigue index (FI) (p = 0.425, p = 0.938, respectively) for anaerobic performance using Analysis of Variance (ANOVA), although, the MP and FI of team C was lower compared to A and B. Furthermore, the total number of failed passes and shot off target of team C was larger compared to B and A (for failed passes = 30 vs 20 vs 25, for shot off target 14 vs 13 vs 8).  Conclusions. The results obtained indicate that there are strong associations between anaerobic capacity and explosive movements (shooting, tackling, heading and passing) among female futsal players.

Predicting Lactate Threshold With Rate of Perceived Exertion in Young Competitive Male Swimmers

2021 ◽  
pp. 003151252110052
Author(s):  
Jhonny K. F. da Silva ◽  
Bruna B. Sotomaior ◽  
Carolina F. Carneiro ◽  
Patrick Rodrigues ◽  
Lee Wharton ◽  
...  
Keyword(s):  
Lactate Threshold ◽  
Perceived Exertion ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Test Protocol ◽  
Male Athletes ◽  
Rate Of Perceived Exertion ◽  
Significant Difference ◽  
Maximal Deviation ◽  
Competitive Swimmers

The purpose of this study was to verify the effectiveness of the rate of perceived exertion threshold (RPET) for predicting young competitive swimmers’ lactate threshold (LT) during incremental testing. We enrolled 13 male athletes ( M age = 16, SD = 0.6 years) in an incremental test protocol consisting of eight repetitions of a 100-meter crawl with 2-minute intervals between each repetition. We collected data for blood lactate concentration ([La]) and Borg scale rate of perceived exertion (RPE) at the end of each repetition. The results obtained were: M RPET = 4.98, SD = 1.12 arbitrary units (A.U.) and M lactate threshold = 4.24, SD = 1.12 mmol.L−1, with [La] and RPE identified by the maximal deviation (Dmax) method without a significant difference ( p > 0.05) and large correlations between DmaxLa and DmaxRPE at variables for time (r = 0.64), velocity (r = 0.67) and percentage of personal best time (PB) (r = 0.60). These results suggest that RPET is a good predictor of LT in young competitive swimmers.

Optimal Adrenergic Support in Septic Shock Due to Peritonitis

2003 ◽  
Vol 98 (4) ◽  
pp. 888-896 ◽  
Author(s):  
Qinghua Sun ◽  
Zizhi Tu ◽  
Suzana Lobo ◽  
George Dimopoulos ◽  
Nathalie Nagy ◽  
...  
Keyword(s):  
Septic Shock ◽  
Cardiac Output ◽  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
The Other ◽  
Control Group ◽  
Lower Blood

Background The authors evaluated optimal adrenergic support using norepinephrine, dopamine, and dobutamine in a clinically relevant model of septic shock. Methods Twenty-eight mature, female, anesthetized sheep (weight, 30.5 +/- 3.6 kg) underwent cecal ligation and perforation and were randomized into four groups of seven animals to be treated with norepinephrine, dopamine-norepinephrine, dobutamine-norepinephrine, or no adrenergic agent. In all groups, lactated Ringer's solution was administered to restore cardiac filling pressures to baseline. In the norepinephrine group, norepinephrine (0.5-5 microg. kg(-1). min(-1)) was titrated to maintain mean arterial pressure between 75-85 mmHg. In the dopamine-norepinephrine group, dopamine was given first, and norepinephrine was added only when mean arterial pressure remained below 75 mmHg despite the infusion of 20 microg. kg(-1). min(-1) dopamine. In the dobutamine-norepinephrine group, dobutamine was started at the same time as norepinephrine and titrated up to 20 microg. kg(-1). min(-1) to get a 15% increase in cardiac output. Results The dobutamine-norepinephrine group had greater cardiac output; superior mesenteric blood flow, oxygen delivery (Do(2)), and oxygen consumption ([OV0312]o(2)); and lower blood lactate concentration and partial pressure of carbon dioxide (Pco(2)) gap than the controls did. Cumulative urine output was significantly higher in the dobutamine-norepinephrine group than in the other groups. Survival time was significantly longer in the dobutamine-norepinephrine (24 +/- 4 h), dopamine- norepinephrine (24 +/- 6 h), and norepinephrine (20 +/- 1 h) groups than the control group (17 +/- 2 h; P < 0.05 vs. other groups), and significantly longer in the combined dopamine-norepinephrine and dobutamine-norepinephrine groups (24 +/- 5 h) than in the norepinephrine alone group (P < 0.05). Histologic examination of lung biopsies revealed less severe lesions in the dobutamine-norepinephrine group than in the control and norepinephrine alone groups. Anatomic alterations in the lung, liver, and small intestine were less severe in the dobutamine-norepinephrine group than in the other groups. Conclusions In this prolonged septic shock model, association of norepinephrine with either dopamine or dobutamine resulted in the longest survival and the least severe pulmonary lesions. The combination of dobutamine with norepinephrine was associated with a better myocardial performance, greater Do(2) and [OV0312]o(2), lower blood lactate concentration and Pco(2) gap, and less anatomic injury.

scholarly journals Lactate Clearance as a Predictive Marker of Mortality in Adult Intensive Care Unit

2020 ◽  
Vol 5 (2) ◽  
pp. 32-38
Author(s):  
Shirish Raj Joshi ◽  
Renu Gurung ◽  
Subhash Prasad Acharya ◽  
Bashu Dev Parajuli ◽  
Navindra Raj Bista
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Lactate Clearance ◽  
Icu Mortality ◽  
Adult Intensive Care Unit ◽  
Icu Admission ◽  
Significant Difference

Introduction: Lactate clearance has been widely investigated. Serial lactate concentrations can be used to examine disease severity and predict mortality in the intensive care unit. We investigated the diagnostic accuracy of lactate concentration and lactate clearance in predicting mortality in critically ill patients during the first 24 hours in Intensive Care Unit (ICU).Methods: It was a Prospective, observational study conducted in ICU. Sixty eight consecutive patients having blood lactate level >2 mmol/L were included irrespective of disease and postoperative status. We measured blood lactate concentration at ICU admission(H0), at six hours(H6), 12 hours(H12), and 24 hours(H24). Lactate clearance was measured for H0-H6, H0-H12 and H0-H24 time period.Results: ICU mortality was 33.8%. Lactate clearance was 15.80 ± 17.21% in survivors and 1.73±11% in non survivors for the H0-H6 (p = 0.001) and remained higher in survivors than in non survivors over the study period of 24 hours; 17.97±15 vs. -2.04±19.84% for H0-H12 and 27.40 ± 11.41% vs. -14.83 ± 26.84% for the H0-H24 period (p < 0.001 for each studied period). There was significant difference in lactate concentration (static) between survivors and non survivors during the course of initial 24 hours. The best predictor of ICU mortality was lactate clearance for the H0-H24 period (AUC =0.89; 95% CI 0.78-1.01). Logistic regression found that H0-H24 lactate clearance was independently correlated to a survival status (p = 0.005, OR = 0.922 and 95% CI 0.871-0.976).Conclusion: Blood lactate concentration and lactate clearance are both predictive for mortality during initial 24 hours of ICU admission.

Final blood lactate concentration after incremental test and aerobic performance

2010 ◽  
Vol 36 (3) ◽  
pp. 335-341 ◽  
Author(s):  
D. V. Popov ◽  
S. S. Missina ◽  
Yu. S. Lemesheva ◽  
E. V. Lyubaeva ◽  
A. S. Borovik ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Aerobic Performance ◽  
Incremental Test

scholarly journals Diferencias en el OBLA en jugadoras de fútbol en relación a su posición en el campo de juego (Differences in OBLA in football players based on their field position)

Retos ◽  
2016 ◽  
pp. 58-61
Author(s):  
Jose E. Del Río Valdivia ◽  
Ciria Margarita Salazar ◽  
Julio Cuevas Romo ◽  
Adriana Isabel Andrade Sánchez ◽  
Pedro Julian Flores Moreno ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
P Value ◽  
Significance Level ◽  
Speed Test ◽  
Physiological Variables ◽  
Significant Difference ◽  
Speed Level ◽  
Field Position

La posición en el campo de juego en el fútbol, no obedece solo a un interés personal, sino que podría depender de variables fisiológicas individuales. El presente estudio determina el OBLA en las diferentes posiciones. La población del estudio fue integrada por 16 jugadoras universitarias de la modalidad soccer (4 por cada posición) evaluadas en una banda sin fin, con una prueba de velocidades crecientes. En cada velocidad utilizada se midió la concentración de lactato sanguíneo con un analizador portátil Accuntrend Lactate Plus. Para el análisis de los datos se propuso una fórmula matemática de interpolación entre las variables velocidad y concentración de lactato. Se encontró, una variación significativa del OBLA, en la muestra estudiada, dependiendo de la posición de juego (porteras, defensas, medio-campistas y delanteras). Utilizando la prueba de Kruskal-Wallis, con un nivel de significancia (α) del 5 %, en búsqueda de la relación entre el OBLA y la posición de las jugadoras, se obtuvo un p-valor de 0.004, por lo que no es posible aceptar la igualdad entre las poblaciones, por lo tanto, se puede afirmar que existe una diferencia estadística significativa cuando se compara el comienzo de acumulación de lactato en sangre (OBLA) con la posición en la que juegan las futbolistas. Los resultados demuestran que existen diferencias estadísticamente significativas entre los grupos de jugadoras de acuerdo a la posición que desempeñan en el campo de juego y a la concentración de lactato en sangre.Abstract. Choosing a field position in football may not depend only on personal interest, but also on individual physiological variables. The aim of the study is to determine the Onset of Blood Lactate Accumulation (OBLA) in the different field positions of football. The study sample was composed by 16 female players (four per position) evaluated using an increased speed test carried out on treadmill. At each speed level, blood lactate concentrations were measured with the portable analyzer Accuntrend Lactate Plus. A mathematical formula interpolating speed and lactate concentration was proposed for the analysis of the data obtained. A significant variation of OBLA was found in the participants, associated with playing position (goalkeepers, defenders, midfielders, and strikers). Setting the significance level (α) at 5%, a p-value of 0.004 was obtained using the Kruskal-Wallis test in order to study the relation between OBLA and players’ field position. This demonstrates that there is no equivalence among positions, at the same time as a statistically significant difference is shown when comparing OBLA with players’ field position. Results show that there are statistically significant differences between the groups of players based on their field position and on blood lactate concentration.

Evaluation of Blood Lactate Concentration in Dogs Receiving Whole Blood Transfusion

2020 ◽  
Author(s):  
B. Zakarevičiūtė ◽  
D. Juodžentė ◽  
B. Karvelienė ◽  
S. Čechovičienė ◽  
V. Riškevičienė
Keyword(s):  
Blood Transfusion ◽  
Blood Lactate ◽  
Whole Blood ◽  
Blood Cells ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Control Group ◽  
Patient Status ◽  
Group I ◽  
Life Saving

Background: A blood transfusion is a routine, life-saving procedure used to replace blood cells or blood products. The current study was aimed to assess whether the blood lactate concentration has a prognostic value of successful blood transfusion.Methods: During the period 2018-2019 group I dogs (n=19) received whole blood transfusion and twenty dogs were assigned to the control group (group II). Blood samples in group I were obtained from cephalic vein before blood transfusion (T0), then after it was finished (4hr±20 min) (T1) and 24hr±20 min after the T0 (T2).Result: The level of blood lactate reached the normal level after blood transfusion in T1 and T2. The clearance of lactate had a moderate negative correlation with packed cell volume (PCV) and red blood cells (RBC). There was no significant correlation between survival rate and blood lactate level. The survivals 24hr after transfusion (T2) had five times higher count of reticulocytes (RETIC) then non-survivals. Serial blood lactate measurement can improve the prediction of successful blood transfusion and it is useful in monitoring the patient status 24hr post blood transfusion, but it doesn’t have the predictive value of survival.

Beta-adrenergic blockade does not prevent the lactate response to exercise after acclimatization to high altitude

1994 ◽  
Vol 76 (2) ◽  
pp. 610-615 ◽  
Author(s):  
R. S. Mazzeo ◽  
G. A. Brooks ◽  
G. E. Butterfield ◽  
A. Cymerman ◽  
A. C. Roberts ◽  
...  
Keyword(s):  
High Altitude ◽  
Sea Level ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Control Group ◽  
Adrenergic Blockade ◽  
Arterial O2 Saturation ◽  
Response To Exercise ◽  
Peak Blood

We examined the extent to which epinephrine influences blood lactate adjustments to exercise during both acute (AC) and chronic (CH) high-altitude exposure. Eleven male sea level residents were divided into a control group (n = 5) receiving a placebo or a drug group (n = 6) receiving 240 mg/day of propranolol. All subjects were studied at rest and during 45 min of submaximal exercise (approximately 50% of sea level maximal O2 uptake) at sea level (SL) and within 4 h of exposure to and after 3 wk residence at 4,300 m (summit of Pikes Peak). Blood samples were collected from the femoral artery for epinephrine and lactate concentration. Exercising blood lactate concentration was significantly different across all altitude conditions such that AC > CH > SL (P < 0.05). For a given arterial O2 saturation, mean exercising blood lactates were lower for the beta-blocked group compared with controls; however, both groups demonstrated similar patterns across all conditions. Epinephrine levels during exercise followed a similar pattern to that of lactate, averaging 0.67, 0.43, and 0.29 ng/ml for AC, CH, and SL, respectively. The correlation between lactate and epinephrine was 0.93 and 0.84 for control and beta-blocked subjects, respectively. Whereas during exercise epinephrine was consistently higher for the beta-blocked group than controls, this difference was only significant during CH exposure. The epinephrine response was related to the extent of hypoxia in both groups.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Effects of Ball Drills and Repeated-Sprint-Ability Training in Basketball Players

2019 ◽  
Vol 14 (6) ◽  
pp. 757-764 ◽  
Author(s):  
Martina A. Maggioni ◽  
Matteo Bonato ◽  
Alexander Stahn ◽  
Antonio La Torre ◽  
Luca Agnello ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Physical Performance ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Technical Skills ◽  
Control Group ◽  
Basketball Players ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Sprint Ability

Purpose: To investigate the effects of ball drills and repeated-sprint-ability training during the regular season in basketball players. Methods: A total of 30 players were randomized into 3 groups: ball-drills training (BDT, n = 12, 4 × 4 min, 3 vs 3 with 3-min passive recovery), repeated-sprint-ability training (RSAT, n = 9, 3 × 6 × 20-m shuttle running with 20-s and 4-min recovery), and general basketball training (n = 9, basketball technical/tactical exercises), as control group. Players were tested before and after 8 wk of training using the following tests: , squat jump, countermovement jump, Yo-Yo Intermittent Recovery Test Level 1 (YIRT1), agility T test, line-drill test, 5-/10-/20-m sprints, and blood lactate concentration. A custom-developed survey was used to analyze players’ technical skills. Results: After training, significant improvements were seen in YIRT1 (BDT P = .014, effect size [ES] ± 90% CI = 0.8 ± 0.3; RSAT P = .022, ES ± 90% CI = 0.7 ± 0.3), the agility T test (BDT P = .018, ES ± 90% CI = 0.7 ± 0.5; RSAT P = .037, ES ± 90% CI = 0.7 ± 0.5), and the line-drill test (BDT P = .010, ES ± 90% CI = 0.3 ± 0.1; RSAT P < .0001, ES ± 90% CI = 0.4 ± 0.1). In the RSAT group, only 10-m sprint speeds (P = .039, ES ± 90% CI = 0.3 ± 0.2) and blood lactate concentration (P = .004, ES ± 90% CI = 0.8 ± 1.1) were improved. Finally, technical skills were increased in BDT regarding dribbling (P = .038, ES ± 90% CI = 0.8 ± 0.6), shooting (P = .036, ES ± 90% CI = 0.8 ± 0.8), passing (P = .034, ES ± 90% CI = 0.9 ± 0.3), rebounding (P = .023, ES ± 90% CI = 1.1 ± 0.3), defense (P = .042, ES ± 90% CI = 0.5 ± 0.5), and offense (P = .044, ES ± 90% CI = 0.4 ± 0.4) skills. Conclusions: BDT and RSAT are both effective in improving the physical performance of basketball players. BDT had also a positive impact on technical skills. Basketball strength and conditioning professionals should include BDT as a routine tool to improve technical skills and physical performance simultaneously throughout the regular training season.

Effects of 2 Intersection Strategies for Physical Recovery in Jiu-Jitsu Athletes

2020 ◽  
pp. 1-6
Author(s):  
Eurico P. César ◽  
Cleito S.R. Júnior ◽  
Raphael N. Francisco
Keyword(s):  
Grip Strength ◽  
Blood Lactate ◽  
Handgrip Strength ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Strength Test ◽  
Time Effect ◽  
Control Group ◽  
Lactate Levels ◽  
Blood Lactate Levels

Purpose: To compare the effect of static stretching (SS) and cold-water immersion (CWI) on strength performance and blood lactate levels of jiu-jitsu athletes. Methods: A total of 21 male Brazilian jiu-jitsu fighters were randomly assigned to SS (9 × 30-s carpal extension), CWI (3 × 3 min at 10°C), or a control group (CG); their maximal handgrip strength, handgrip muscle endurance, dynamic kimono grip strength test, and blood lactate concentration were assessed before and after a simulated Brazilian jiu-jitsu fight and after one of the recovery interventions. Results: There was an interaction (F = 9.075; P = .002) and a time effect (F = 11.792; P = .003) for dynamic kimono grip strength test, showing a decrease in performance for the CG (P = .0001; effect size [ES] = 0.52, moderate) and after SS (P = .006; ES = 0.43, small). There was an interaction (F = 3.592; P = .015) and a time effect (F = 122.631; P = .0001) for blood lactate concentration, showing lower levels after CWI versus CG (P = .028; ES = 0.93, moderate) and after CWI versus SS (P = .042; ES = 0.82, moderate). There was an interaction (F = 9.617; P = .001) for handgrip strength, showing an impairment in performance after SS (P = .001; ES = 0.67, moderate). Conclusion: CWI promoted restoration of muscle strength and endurance and reduction in blood lactate levels after the simulated fight and can thus be used by jiu-jitsu athletes as a recovery strategy between fights.

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