Effects of Higher Relative pH but Lower Blood Lactate Concentration on Wingate Test Performance

Purpose:The aim of this study was to compare asynchronous (AS Y) arm cranking (cranks at 180° relative to each other) with synchronous (SYN) arm cranking (parallel crank setting) during the 30 s Wingate anaerobic test.Methods:Thirty-two physically active men (aged 22.1 ± 2.4 y) completed two Wingate tests (one ASY and one SYN) separated by 4 d in a randomized counterbalanced order. The Wingate tests were completed on a modified electromagnetically braked cycle ergometer. Performance measures assessed during the two tests include peak power, mean power, minimum power, time to peak power, rate to fatigue and maximum cadence (RPMmax). Blood lactate concentration was also measured before and 5 min after the tests.Results:Peak and mean power (both absolute and relative to body weight) during SYN arm cranking were significantly (p < 0.001) less than during ASY arm cranking. Rate to fatigue and RPMmax were also significantly (p = 0.012) lower during SYN arm cranking compared with ASY arm cranking. No significant difference was found between test conditions for minimum power, time to peak power or blood lactate concentration.Conclusions:These findings demonstrate that ASY arm cranking results in higher peak and mean anaerobic power compared with SYN arm cranking during the Wingate test. Therefore, an ASY arm crank configuration should be used to assess anaerobic power in most individuals although specific population groups may require further testing to determine which crank configuration is most suitable for the Wingate test.

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Do maximal aerobic power and blood lactate concentration affect Specific Judo Fitness Test performance in female judo athletes?

Biology of Sport ◽

10.5604/20831862.1221890 ◽

2016 ◽

Vol 33 (4) ◽

pp. 367-372 ◽

Cited By ~ 2

Author(s):

Hadhami Garbouj ◽

Mohamed Amine Salmi ◽

Radhouane Haj Sassi ◽

Mohamed Haj Yahmed ◽

karim chamari ◽

...

Keyword(s):

Blood Lactate ◽

Test Performance ◽

Aerobic Power ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Maximal Aerobic Power ◽

Fitness Test ◽

Judo Athletes

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Optimal Adrenergic Support in Septic Shock Due to Peritonitis

Anesthesiology ◽

10.1097/00000542-200304000-00015 ◽

2003 ◽

Vol 98 (4) ◽

pp. 888-896 ◽

Cited By ~ 23

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.

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Effects of Honey (Apis mellifera and Apis cerana Species) Supplementation on Reducing Blood Lactate Concentration in Futsal Athletes

Polish Journal of Sport and Tourism ◽

10.2478/pjst-2019-0020 ◽

2019 ◽

Vol 26 (4) ◽

pp. 11-15

Author(s):

Kusnaedi Kusnaedi ◽

Adnyana I Ketut ◽

Tommy Apriantono ◽

Syahruddin Syahruddin ◽

Junaidi Junaidi ◽

...

Keyword(s):

Apis Mellifera ◽

Blood Lactate ◽

Test Performance ◽

Apis Cerana ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Sprint Performance ◽

T Test ◽

Daily Consumption ◽

Main Effects

AbstractIntroduction. The purpose of this study was to examine whether 6-week daily consumption of honey from Apis mellifera and Apis cerana species would affect performance and reduce blood lactate in futsal athletes.Subjects and Methods. In this study, 30 male futsal athletes volunteered to be subjects. A group of 15 futsal athletes volunteered for random blind assignment to either an Apis mellifera honey (AM) group or an Apis cerana honey (AC) group. Each group completed tests pre- and post-supplementation for 20 m sprint test and agility t-test. Additionally, blood lactate was measured before and immediately after the tests.Results. Independent t-test revealed significant changes from before to after supplementation in the AC group (p=0.009) for lactate post. Conversely, independent t-test revealed no significant changes in the AM group (p=0.698) for lactate post. Regarding 20 m sprint performance, there were statistically significant differences for time (p=0.036) and group main effects (p=0.009). Specifically, independent t-test showed significant changes from before to after supplementation just in the AC group (p=0.018). For the t-test, independent t-test revealed significant changes from before to after supplementation in the AC group (p=0.013).Conclusions. We demonstrated that 1.14 g/kg of Apis cerana honey given once a day at breakfast for 6 weeks is more effective in reducing blood lactate concentration and enhancing agility t-test performance than 1.14 g/kg of Apis mellifera honey in futsal athletes.

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Metabolic and Cardiorespiratory Responses of Semiprofessional Football Players in Repeated Ajax Shuttle Tests and Curved Sprint Tests, and Their Relationship with Football Match Play

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17217745 ◽

2020 ◽

Vol 17 (21) ◽

pp. 7745

Author(s):

Tomasz Gabrys ◽

Arkadiusz Stanula ◽

Urszula Szmatlan-Gabrys ◽

Michal Garnys ◽

Luboš Charvát ◽

...

Keyword(s):

Blood Lactate ◽

Test Performance ◽

Pulmonary Ventilation ◽

Lactate Concentration ◽

Total Duration ◽

Blood Lactate Concentration ◽

Energy System ◽

Football Players ◽

Performance Decrement ◽

Physiological Variables

In this study, the Ajax Shuttle Test (AST) and the Curved Sprint Test (CST) were conducted on semiprofessional football players to evaluate (1) their test performance, (2) the extent of anaerobic glycolysis by measuring blood lactate, (3) performance decrement and onset of fatigue, and (4) the correlation between selected physiological variables and test performance. Thirty-two semiprofessional Polish football players participated in this study. Both AST and CST were conducted on an outdoor football ground and were conducted in two sets; each set had six repetitions. In the case of AST, the total duration for 6 repetitions of the exercise in Sets 1 and 2 were 90.63 ± 3.71 and 91.65 ± 4.24 s, respectively, whereas, in the case of CST, the respective values were 46.8 ± 0.56 and 47.2 ± 0.66 s. Peak blood lactate concentration [La] after Sets 1 and 2 of AST were 14.47 ± 3.77 and 15.00 ± 1.85 mmol/L, and in the case of CST, the values were 8.17 ± 1.32 and 9.78 ± 1.35 mmol/L, respectively. Performance decrement in AST was more than in CST, both after Set 1 (4.32 ± 1.43 and 3.31 ± 0.96 in AST and CST, respectively) and Set 2 (7.95 ± 3.24 and 3.71 ± 1.02 in AST and CST, respectively). Only in a few of the repetitions, pulmonary ventilation (VE) and oxygen uptake (VO2) were found to be significantly correlated with the performance of the volunteers in both AST and CST. Respiratory exchange ratio (RER) was significantly correlated with most of the repetitions of AST, but not with CST. The study concludes that (1) AST shows more dependence on the anaerobic glycolytic system than shorter repetitive sprints (as in CST), (2) there is more performance decrement and fatigue in AST than in CST, and (3) early decrease in performance and fatigue in the semiprofessional football players in AST and CST may be due to the insufficiency of their aerobic energy system.

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Aerobic and glycolytic metabolism in arm exercise

Journal of Applied Physiology ◽

10.1152/jappl.1979.47.4.754 ◽

1979 ◽

Vol 47 (4) ◽

pp. 754-760 ◽

Cited By ~ 46

Author(s):

D. Pendergast ◽

P. Cerretelli ◽

D. W. Rennie

Keyword(s):

Blood Lactate ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Mechanical Efficiency ◽

Muscle Training ◽

Lower Blood ◽

Arm Work ◽

Submaximal Work ◽

Specific Muscle ◽

Sedentary Subjects

Eight kayakers (K) and 3 sedentary subjects (S) performed arm cranking and pedaling while erect or supine at each of several work loads from submaximal to the highest they could sustain for 2 min and for intervals varying from 10 s to 5 min. From measurements of VO2 and blood lactate concentration, the aerobic and glycolytic energy release in arm work was assessed. For steady-state aerobic work all subjects had a mechanical efficiency averaging 0.24 independent of posture or exercise mode. Per unit fat-free limb volume, arm VO2max of group K was 1.5-fold that of group S, whereas leg VO2max was the same in each group. Compared to group S, glycolytic arm work in group K was characterized by: 1) higher thresholds for release of lactate at the onset of submaximal work, 2) lower blood lactate concentrations during comparable absolute or relative submaximal work, 3) higher conventional anaerobic thresholds for absolute, but not relative work loads, 4) higher maximal rates of lactate release, and 5) the same maximal blood lactate concentrations. Measurement of the early lactate threshold, which occurred at considerably lower arm work loads than did anaerobic threshold, but which was greatly increased by specific muscle training, may provide a simple, sensitive, and nontraumatic evaluation of muscle training.

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Higher exercise performance and lower VO2max in Tibetan than Han residents at 4,700 m altitude

Journal of Applied Physiology ◽

10.1152/jappl.1994.77.2.684 ◽

1994 ◽

Vol 77 (2) ◽

pp. 684-691 ◽

Cited By ~ 52

Author(s):

R. L. Ge ◽

Q. H. Chen ◽

L. H. Wang ◽

D. Gen ◽

P. Yang ◽

...

Keyword(s):

Blood Lactate ◽

Exercise Performance ◽

Maximal Exercise ◽

Minute Ventilation ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Blood Gases ◽

Lower Blood ◽

The Mean ◽

Peripheral Adaptation

To examine the hypothesis that the pathway of adaptation to high altitude in natives differs considerably from that in newcomers, we measured maximal O2 uptake (VO2max), minute ventilation, anaerobic threshold (AT), blood lactate, and blood gases during maximal exercise in 17 lifelong Tibetan residents and 14 acclimatized Han Chinese newcomers living at the altitude of 4,700 m. The two groups were similar in age, height, and weight, and the subjects were nonathletes. Although VO2max was significantly lower in the Tibetans than in the Hans (30.4 +/- 1.5 vs. 36.0 +/- 1.9 ml.min-1.kg-1 STPD; P < 0.05), at maximal exercise effort the exercise workload was greater (167.7 +/- 4.2 vs. 150.0 +/- 5.9 W; P < 0.05). The mean AT values (in % VO2max) in the Tibetan and Han subjects were 84.1 and 61.6%, respectively (P < 0.01). Minute ventilation at maximal exercise was significantly lower in the Tibetans than in the Hans (68.4 +/- 3.4 vs. 79.7 +/- 4.1 l/min BTPS; P < 0.05), whereas heart rate at maximal effort was equivalent in the two groups. The Tibetans showed lower blood lactate value than did the Hans both before and at the end of exercise. We conclude that the Tibetan natives have higher exercise performance and AT but lower VO2max and blood lactate concentration than do acclimatized Han newcomers. These results may reflect the effects of genetic or peripheral adaptation factors in the Tibetan natives.

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Blood Lactate Responses to Exercise in Children: Part 1. Peak Lactate Concentration

Pediatric Exercise Science ◽

10.1123/pes.9.3.210 ◽

1997 ◽

Vol 9 (3) ◽

pp. 210-222 ◽

Cited By ~ 5

Author(s):

Peter Pfitzinger ◽

Patty Freedson

Keyword(s):

Blood Lactate ◽

Maximal Exercise ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Lactate Metabolism ◽

Lower Blood ◽

Peak Lactate ◽

Peak Blood ◽

Peak Blood Lactate

Part 1 reviews the literature concerning peak blood lactate responses to exercise in children. After a brief overview of lactate metabolism, an analysis is presented comparing children to adults regarding peak blood lactate concentration. Possible factors accounting for lower blood lactate concentrations during maximal exercise in children are considered.

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The influence of execution speed on blood lactate concentration in strength training protocol in bench press exercise

Revista Brasileira de Fisiologia do Exercício ◽

10.33233/rbfe.v19i1.3990 ◽

2020 ◽

Vol 19 (1) ◽

pp. 32

Author(s):

Gustavo Taques Marczynski ◽

Luís Carlos Zattar Coelho ◽

Leonardo Emmanuel De Medeiros Lima ◽

Rodrigo Pereira Da Silva ◽

Dilmar Pinto Guedes Jr ◽

...

Keyword(s):

Strength Training ◽

Blood Lactate ◽

Bench Press ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

The Third ◽

Fast Speed ◽

Work Volume ◽

Execution Speed ◽

Training Protocol

The aim of this study was to analyze the influence of two velocities of execution relative to blood lactate concentration in strength training exercise until the momentary concentric failure. Fifteen men (29.1 ± 5.9 years), trained, participated in the experiment. The volunteers performed three bench press sessions, with an interval of 48 hours between them. At the first session, individuals determined loads through the 10-12 RMs test. In the following two sessions, three series with 90 seconds of interval were performed, in the second session slow execution speed (cadence 3030) and later in the third session fast speed (cadence 1010). For statistical analysis, the Student-T test was used for an independent sample study and considered the value of probability (p) ≤ 0.05 statistically significant. By comparing the number of repetitions and time under tension of the two runs, all series compared to the first presented significant reductions (p < 0.05). The total work volume was higher with the fast speed (p < 0.05). The study revealed that rapid velocities (cadence 1010) present a higher concentration of blood lactate when compared to slow runs (cadence 3030). The blood lactate concentration, in maximum repetitions, is affected by the speed of execution.Keywords: resistance training, cadence, blood lactate.

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Caffeine supplementation for 4-day, followed by acute ingestion, did not impact triathlete output power after submaximal intensity exercise

Revista Brasileira de Fisiologia do Exercício ◽

10.33233/rbfe.v18i3.3230 ◽

2019 ◽

Vol 18 (3) ◽

pp. 118

Author(s):

Anderson Pontes Morales ◽

Felipe Sampaio-Jorge ◽

Thiago Barth ◽

Alessandra Alegre De Matos ◽

Luiz Felipe Da Cruz Rangel ◽

...

Keyword(s):

Blood Lactate ◽

Output Power ◽

Body Mass ◽

Effect Size ◽

Power Output ◽

Anaerobic Power ◽

Lactate Concentration ◽

Wingate Test ◽

Large Effect Size ◽

Acute Ingestion

Introduction: The aim of this study was to test the hypothesis that caffeine supplementation (6 mg·kg-1 body mass) for 4-days, followed by acute intake, would impact five male triathletes output power after performed submaximal intensity exercise. Methods: This was a randomized, double-blind, placebo-controlled crossover study, placebo (4-day) - placebo (acute) PP, placebo (4-days) -caffeine (acute) PC, and caffeine (4-day) - caffeine (acute) CC. Participants abstained from dietary caffeine sources for 4 days and ingested capsules containing either placebo or caffeine (6 mg.kg-1 body mass day in one absorption). The acute trials the capsules containing placebo or caffeine (6 mg.kg-1 body mass day in one absorption) were ingested 60min before completing exercise in a treadmill for 40min (80% VO2max) and to perform the Wingate test. Results: Blood lactate was determined before, 60min after ingestion, and immediately after the exercise on the treadmill, the Wingate test, and after the recovery (10-min). CC and PC trials did not change the cardiopulmonary variables (P>0.05) and the anaerobic power variables (peak/mean power output and fatigue index) (P>0.05). The PC trial compared with PP promoted improvements in the curve power output in 2 sec by 31.19% (large effect-size d = 1.08; P<0.05) and 3 sec by 20% (large effect-size d = 1.19; P<0.05). A 10min recovery was not sufficient to reduce blood lactate concentration in the PC trial compared with PP (PC, 13.73±2.66 vs. PP, 10.26±1.60 mmol.L-1; P<0.05, respectively) (P<0.05). Conclusion: In conclusion, these results indicate that caffeine supplementation (6 mg·kg-1 body mass) for 4 days, followed by acute ingestion, did not impact the triathletes output power after performed submaximal intensity exercise. Nutritional interventions may help researchers and athletes to adapt strategies for manipulating caffeine use.Key-words: caffeine metabolism, Wingate test, blood lactate, performance.

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