Blood lactate responses to plyometric training in cricket players of different maturity level: a randomised controlled trial

2019 ◽  
Vol 15 (2) ◽  
pp. 85-93
Author(s):  
D. Singla ◽  
M.Y. Shareef ◽  
M.E. Hussain
Keyword(s):  
Blood Lactate ◽  
Controlled Trial ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Acute Effect ◽  
Plyometric Training ◽  
Maturity Level ◽  
Before And After ◽  
Lactate Levels ◽  
Randomised Controlled

Previous studies commonly examined the acute effect of plyometric exercise on blood lactate. To the best of our knowledge, no study has examined the effect of short-term plyometric training on blood lactate levels of cricket players. To investigate the effect of an 8 week plyometric training program on blood lactate concentration in cricket players of different maturity level. 55 healthy male cricket players (aged 14-35 years) were categorised into 14-17, 18-25 and 26-35 groups. Blood lactate concentration (BLAC) was assessed before and after 8 weeks of the intervention period. Regardless of the maturity level, a significant reduction in BLAC was observed in the experimental cricketers (P<0.05) in response to 8 weeks of training. Blood lactate responses did not vary significantly in 14-17, 18-25 and 26-35 groups of cricket players following plyometric training. Plyometric training significantly reduced BLAC in cricket players despite non-significant differences amongst 14-17, 18-25 and 26-35 groups. Plyometric training could be recommended for adolescent (14-17) and adult cricketers (18-25 and 26-35) for improving their physiological capacities so as to develop optimal performance.

Blood Lactate Levels in Free-Swimming Rainbow Trout (Salmo gairdneri) Before and After Strenuous Exercise Resulting in Fatigue

1976 ◽  
Vol 33 (1) ◽  
pp. 173-176 ◽  
Author(s):  
William R. Driedzic ◽  
Joe W. Kiceniuk
Keyword(s):  
Rainbow Trout ◽  
Blood Lactate ◽  
White Muscle ◽  
Recovery Period ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Strenuous Exercise ◽  
Salmo Gairdneri ◽  
Before And After ◽  
Lactate Levels

Rainbow trout (Salmo gairdneri) were exercised to fatigue in a series of 60-min stepwise increasing velocity increments. There was no increase in blood lactate concentration, serially sampled during swimming by means of indwelling dorsal and ventral aortic catheters, at velocities as high as 93% of critical velocity of individuals. The data show that under these conditions the rate of production of lactate by white muscle, at less than critical velocities, is minimal or that the rate of elimination of lactate from white muscle is equal to its rate of utilization elsewhere. Immediately following fatigue blood lactate level increases rapidly. During the recovery period there appears to be a net uptake of lactate by the gills.

Blood lactate concentration in COVID-19: a systematic literature review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Giovanni Carpenè ◽  
Diletta Onorato ◽  
Riccardo Nocini ◽  
Gianmarco Fortunato ◽  
John G. Rizk ◽  
...  
Keyword(s):  
Literature Review ◽  
Blood Lactate ◽  
Systematic Literature Review ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Organ Injury ◽  
Respiratory Condition ◽  
Therapeutic Decisions ◽  
Lactate Levels ◽  
Elevated Lactate

Abstract Coronavirus disease 2019 (COVID-19) is an infectious respiratory condition sustained by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which manifests prevalently as mild to moderate respiratory tract infection. Nevertheless, in a number of cases the clinical course may deteriorate, with onset of end organ injury, systemic dysfunction, thrombosis and ischemia. Given the clinical picture, baseline assessment and serial monitoring of blood lactate concentration may be conceivably useful in COVID-19. We hence performed a systematic literature review to explore the possible association between increased blood lactate levels, disease severity and mortality in COVID-19 patients, including comparison of lactate values between COVID-19 and non-COVID-19 patients. We carried out an electronic search in Medline and Scopus, using the keywords “COVID-19” OR “SARS-CoV-2” AND “lactate” OR “lactic acid” OR “hyperlactatemia”, between 2019 and present time (i.e. October 10, 2021), which allowed to identify 19 studies, totalling 6,459 patients. Overall, we found that COVID-19 patients with worse outcome tend to display higher lactate values than those with better outcome, although most COVID-19 patients in the studies included in our analysis did not have sustained baseline hyperlactatemia. Substantially elevated lactate values were neither consistently present in all COVID-19 patients who developed unfavourable clinical outcomes. These findings suggest that blood lactate monitoring upon admission and throughout hospitalization may be useful for early identification of higher risk of unfavourable COVID-19 illness progression, though therapeutic decisions based on using conventional hyperlactatemia cut-off values (i.e., 2.0 mmol/L) upon first evaluation may be inappropriate in patients with SARS-CoV-2 infection.

Disposal of blood [1-13C]lactate in humans during rest and exercise

1986 ◽  
Vol 60 (1) ◽  
pp. 232-241 ◽  
Author(s):  
R. S. Mazzeo ◽  
G. A. Brooks ◽  
D. A. Schoeller ◽  
T. F. Budinger
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Curvilinear Relationship ◽  
O2 Consumption ◽  
Lactate Oxidation ◽  
Respiratory Parameters ◽  
Steady Rate ◽  
Lactate Levels

Lactate irreversible disposal (RiLa) and oxidation (RoxLa) rates were studied in six male subjects during rest (Re), easy exercise [EE, 140 min of cycling at 50% of maximum O2 consumption (VO2max)] and hard exercise (HE, 65 min at 75% VO2max). Twenty minutes into each condition, subjects received a Na+-L(+)-[1–13C]lactate intravenous bolus injection. Blood was sampled intermittently from the contralateral arm for metabolite levels, acid-base status, and enrichment of 13C in lactate. Expired air was monitored continuously for determination of respiratory parameters, and aliquots were collected for determination of 13C enrichment in CO2. Steady-rate values for O2 consumption (VO2) were 0.33 +/- 0.01, 2.11 +/- 0.03, and 3.10 +/- 0.03 l/min for Re, EE, and HE, respectively. Corresponding values of blood lactate levels were 0.84 +/- 0.01, 1.33 +/- 0.05, and 4.75 +/- 0.28 mM in the three conditions. Blood lactate disposal rates were significantly correlated to VO2 (r = 0.78), averaging 123.4 +/- 20.7, 245.5 +/- 40.3, and 316.2 +/- 53.7 mg X kg-1 X h-1 during Re, EE, and HE, respectively. Lactate oxidation rate was also linearly related to VO2 (r = 0.81), and the percentage of RiLa oxidized increased from 49.3% at rest to 87.0% during exercise. A curvilinear relationship was found between RiLa and blood lactate concentration. It was concluded that, in humans, 1) lactate disposal (turnover) rate is directly related to the metabolic rate, 2) oxidation is the major fate of lactate removal during exercise, and 3) blood lactate concentration is not an accurate indicator of lactate disposal and oxidation.

scholarly journals Modulation of Endothelial Glycocalyx and Microcirculation in Healthy Young Men during High-Intensity Sprint Interval Cycling-Exercise by Supplementation with Pomegranate Extract. A Randomized Controlled Trial

2020 ◽  
Vol 17 (12) ◽  
pp. 4405
Author(s):  
Zivile Pranskuniene ◽  
Egle Belousoviene ◽  
Neringa Baranauskiene ◽  
Nerijus Eimantas ◽  
Egle Vaitkaitiene ◽  
...  
Keyword(s):  
High Intensity ◽  
Controlled Trial ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Endothelial Glycocalyx ◽  
Control Group ◽  
Cycling Exercise ◽  
Before And After ◽  
Interval Cycling ◽  
Experimental Group

The natural components of the pomegranate fruit may provide additional benefits for endothelial function and microcirculation. It was hypothesized that supplementation with pomegranate extract might improve glycocalyx properties and microcirculation during acute high-intensity sprint interval cycling exercise. Eighteen healthy and recreationally active male volunteers 22–28 years of age were recruited randomly to the experimental and control groups. The experimental group was supplemented with pomegranate extract 20 mL (720 mg phenolic compounds) for two weeks. At the beginning and end of the study, the participants completed a high-intensity sprint interval cycling-exercise protocol. The microcirculation flow and density parameters, glycocalyx markers, systemic hemodynamics, lactate, and glucose concentration were evaluated before and after the initial and repeated (after 2 weeks supplementation) exercise bouts. There were no significant differences in the microcirculation or glycocalyx over the course of the study (p < 0.05). The lactate concentration was significantly higher in both groups after the initial and repeated exercise bouts, and were significantly higher in the experimental group compared to the control group after the repeated bout: 13.2 (11.9–14.8) vs. 10.3 (9.3–12.7) mmol/L, p = 0.017. Two weeks of supplementation with pomegranate extract does not influence changes in the microcirculation and glycocalyx during acute high-intensity sprint interval cycling-exercise. Although an unexplained rise in blood lactate concentration was observed.

Lactate Threshold in 50- to 55-Year-Old Men

1996 ◽  
Vol 4 (3) ◽  
pp. 286-296
Author(s):  
Fiona Iredale ◽  
Frank Bell ◽  
Myra Nimmo
Keyword(s):  
Blood Lactate ◽  
Lactate Threshold ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Peak Oxygen Uptake ◽  
State Test ◽  
The Absolute ◽  
Lactate Levels ◽  
Old Men ◽  
Treadmill Protocol

Fourteen sedentary 50- to 55-year-old men were exercised to exhaustion using an incremental treadmill protocol. Mean (±SEM) peak oxygen uptake (V̇O2peak) was 40.5 ± 1.19 ml · kg1· min−1, and maximum heart rate was 161 ± 4 beats · min−1. Blood lactate concentration was measured regularly to identify the lactate threshold (oxygen consumption at which blood lactate concentration begins to systematically increase). Threshold occurred at 84 ± 2% of V̇O2peak. The absolute lactate value at threshold was 2.9 ± 0.2 mmol · L−1. On a separate occasion, 6 subjects exercised continuously just below their individual lactate thresholds for 25 min without significantly raising their blood lactate levels from the 10th minute to the 25th. The absolute blood lactate level over the last 20 min of the steady-state test averaged 3.7 ± 1.2 mmol · L−1. This value is higher than that elicited at the threshold in the incremental test because of the differing nature of the protocols. It was concluded that although the lactate threshold occurs at a high percentage of V̇O2peak, subjects are still able to sustain exercise at that intensity for 25 min.

Effect of endurance training on activators of glycolysis in muscle during exercise

1994 ◽  
Vol 76 (2) ◽  
pp. 846-852 ◽  
Author(s):  
C. Duan ◽  
W. W. Winder
Keyword(s):  
Endurance Training ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Lactate Production ◽  
Blood Lactate Concentration ◽  
Quadriceps Muscle ◽  
Muscle Lactate ◽  
Cyclic Monophosphate ◽  
Lactate Levels ◽  
Exercise Induced

Endurance training attenuates exercise-induced increases in blood lactate at the same submaximal work rate. Three intramuscular compounds that influence muscle lactate production were measured in fasted non-trained (NT) and endurance-trained (T) rats. The T rats were subjected to a progressive endurance-training program. At the end of the program (11 wk), they were running 2 h/day at 31 m/min up a 15% grade 5 days/wk. NT and T rats were fasted for 24 h and then anesthetized (pentobarbital, iv) at rest or after running for 30 min at 21 m/min (15% grade). Blood lactate levels were significantly lower in the T rats than in the NT rats after 30 min of running (2.3 +/- 0.2 vs. 3.9 +/- 0.2 mM). The lower blood lactate concentration was accompanied by lower plasma epinephrine (2.8 +/- 0.4 vs. 6.0 +/- 0.8 nM), adenosine 3′, 3′,5′-cyclic monophosphate (0.36 +/- 0.02 vs. 0.50 +/- 0.03 pmol/mg), mg), glucose 1,6-diphosphate (26 +/- 2 vs. 40 +/- 5 pmol/mg), and fructose 2,6-diphosphate (3.2 +/- 0.2 vs. 4.3 +/- 0.3 pmol/mg) in white quadriceps muscle in T than in NT rats. Red quadriceps muscle glucose 1,6-diphosphate and adenosine 3′,5′-cyclic monophosphate were also lower in T than in NT rats. These adaptations may be responsible in part for the lower exercise-induced blood lactate in fasted rats as a consequence of endurance training.

scholarly journals Acute Physiological Responses to Ultra Short Race‐Pace Training in Competitive Swimmers

2020 ◽  
Vol 75 (1) ◽  
pp. 95-102
Author(s):  
David Williamson ◽  
Earl McCarthy ◽  
Massimiliano Ditroilo
Keyword(s):  
Heart Rate ◽  
Blood Lactate ◽  
Physiological Responses ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
High Volume ◽  
High Heart Rate ◽  
Training Modality ◽  
Before And After ◽  
Rate Profile

Abstract Ultra Short Race Pace training (USRPT) is an emerging training modality devised in 2011 to deviate from high-volume swimming training that is typically prescribed. USRPT aims to replicate the exact demands of racing, through its unique prescription of race-pace velocity sets with short rest intervals. It has been surmised, with little physiological evidence, that USRPT provides swimmers with the best opportunity to optimize the conditioning, technique, and psychology aspects of racing at the most specific velocity of the relevant event, with low blood lactate concentration. The aim of this study was to examine acute physiological responses of USRPT. Fourteen swimmers were recruited to perform a USRPT set: 20 x 25 m freestyle with a 35-s rest interval. Swimmers were required to maintain the velocity of their 100 m personal best time for each sprint. Sprint performance, blood lactate, heart rate and the RPE were measured. Blood lactate was taken before, during (after every 4 sprints) and 3 minutes after the USRPT protocol. Heart rate monitors were used to profile the heart rate. Athletes reported the RPE before- and after completion of the USRPT set. Sprint times increased by 3.3-10.8% when compared to the first sprint (p < 0.01). There was high blood lactate concentration (13.6 ± 3.1mmol/l), a significant change in the RPE from 8 ± 1.6 to 18 ± 1.6 (p < 0.01) and a substantially high heart rate profile with an average HRmax of 188 ± 9 BPM. The results show the maximal intensity nature of USRPT and portray it as an anaerobic style of training.

scholarly journals Evaluation of a Lactate Sensor for Rapid Repeated Measurements of Blood Lactate Concentration

1998 ◽  
Vol 26 (2) ◽  
pp. 184-188 ◽  
Author(s):  
J. V. Divatia ◽  
T. Jacques ◽  
P. Day ◽  
D. J. Bihari
Keyword(s):  
Blood Lactate ◽  
Coefficient Of Variation ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Laboratory Method ◽  
Repeated Measurements ◽  
Arterial Blood ◽  
Lactate Levels ◽  
Lactate Sensor ◽  
Serial Measurements

In critically ill patients, serial measurements of blood lactate may indicate adequacy of therapy and predict development of multi-organ failure. We studied the accuracy, precision, and repeatability of the newly developed 800 Series Lactate Sensor (Ciba Corning Diagnostic Corp., Medfield, U.S.A.). Lactate levels determined with the sensor were compared with the standard laboratory method (Abbott TDX) in 75 paired arterial blood samples from 20 patients. Agreement between methods was determined and the mean coefficient of variation calculated for repeated measurements. The bias of the sensor was -0.38 mmol/l (CI -0.23 to -0.53), and the precision ±0.67. The coefficient of variation for repeated measurements was 1.95% with the sensor, and 11.5% with the TDX (P=0.007). The new sensor offers a more reproducible, rapid method of measuring lactate, vital for serial measurements. The relatively wide limits of agreement between the methods reflect the greater variability of the TDX assay.

The V˙o 2 slow component for severe exercise depends on type of exercise and is not correlated with time to fatigue

1998 ◽  
Vol 85 (6) ◽  
pp. 2118-2124 ◽  
Author(s):  
Veronique L. Billat ◽  
Ruddy Richard ◽  
Valerie M. Binsse ◽  
Jean P. Koralsztein ◽  
Philippe Haouzi
Keyword(s):  
Blood Lactate ◽  
Slow Component ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Muscular Contraction ◽  
Work Rate ◽  
Severe Exercise ◽  
The Difference ◽  
Lactate Levels ◽  
Type Of Exercise

The purpose of this study was to examine the influence of the type of exercise (running vs. cycling) on the O2uptake (V˙o 2) slow component. Ten triathletes performed exhaustive exercise on a treadmill and on a cycloergometer at a work rate corresponding to 90% of maximalV˙o 2 (90% work rate maximalV˙o 2). The duration of the tests before exhaustion was superimposable for both type of exercises (10 min 37 s ± 4 min 11 s vs. 10 min 54 s ± 4 min 47 s for running and cycling, respectively). TheV˙o 2 slow component (difference between V˙o 2 at the last minute and minute 3 of exercise) was significantly lower during running compared with cycling (20.9 ± 2 vs. 268.8 ± 24 ml/min). Consequently, there was no relationship between the magnitude of theV˙o 2 slow component and the time to fatigue. Finally, because blood lactate levels at the end of the tests were similar for both running (7.2 ± 1.9 mmol/l) and cycling (7.3 ± 2.4 mmol/l), there was a clear dissociation between blood lactate and the V˙o 2slow component during running. These data demonstrate that 1) theV˙o 2 slow component depends on the type of exercise in a group of triathletes and 2) the time to fatigue is independent of the magnitude of theV˙o 2 slow component and blood lactate concentration. It is speculated that the difference in muscular contraction regimen between running and cycling could account for the difference in theV˙o 2 slow component.

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