scholarly journals Effect of Plasma Volume Loss during Graded Exercise Testing on Blood Lactate Concentration

2007 ◽  
Vol 57 (2) ◽  
pp. 95-99 ◽  
Author(s):  
James A. Davis ◽  
Ralph Rozenek ◽  
Derek M. DeCicco ◽  
Michael T. Carizzi ◽  
Patrick H. Pham
Keyword(s):  
Blood Lactate ◽  
Exercise Testing ◽  
Plasma Volume ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Volume Loss ◽  
Graded Exercise Testing ◽  
Graded Exercise

Lactate removal ability and graded exercise in humans

1990 ◽  
Vol 68 (3) ◽  
pp. 905-911 ◽  
Author(s):  
S. Oyono-Enguelle ◽  
J. Marbach ◽  
A. Heitz ◽  
C. Ott ◽  
M. Gartner ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Inverse Correlation ◽  
Continuous Model ◽  
Work Rate ◽  
Linear Relationships ◽  
Graded Exercise ◽  
Lactate Removal ◽  
The Individual

Venous lactate concentrations of nine athletes were recorded every 5 s before, during, and after graded exercise beginning at a work rate of 0 W with an increase of 50 W every 4th min. The continuous model proposed by Hughson et al. (J. Appl. Physiol. 62: 1975-1981, 1987) was well fitted with the individual blood lactate concentration vs. work rate curves obtained during exercise. Time courses of lactate concentrations during recovery were accurately described by a sum of two exponential functions. Significant direct linear relationships were found between the velocity constant (gamma 2 nu) of the slowly decreasing exponential term of the recovery curves and the times into the exercise when a lactate concentration of 2.5 mmol/l was reached. There was a significant inverse correlation between gamma 2 nu and the rate of lactate increase during the last step of the exercise. In terms of the functional meaning given to gamma 2 nu, these relationships indicate that the shift to higher work rates of the increase of the blood lactate concentration during graded exercise in fit or trained athletes, when compared with less fit or untrained ones, is associated with a higher ability to remove lactate during the recovery. The results suggest that the lactate removal ability plays an important role in the evolution pattern of blood lactate concentrations during graded exercise.

scholarly journals Graded exercise test with or without load carriage similarly measures maximal oxygen uptake in young males and females

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246303
Author(s):  
Zhenhuan Wang ◽  
Muhammed M. Atakan ◽  
Xu Yan ◽  
Hüseyin H. Turnagöl ◽  
Honglei Duan ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Load Carriage ◽  
Test Duration ◽  
Young Males ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Males And Females ◽  
Image Position

The aim of this was to compare the effects of the graded exercise test (GXT) with or without load carriage on maximal oxygen uptake (V˙O2max) heart rate (HR), and expired ventilation (V˙E) and blood lactate in young healthy males and females. The study included ten females (age:20.2±0.7 yrs) and ten males (age:19.5±0.7 yrs) who performed the modified Bruce protocol at five load conditions; unloaded, 5, 10, 15, and 20% of body weight (BW) (kg). All the tests were performed in random order, at least 48 hours apart. During the GXTs, HR, V˙O2max, V˙E, workload and test duration were recorded and blood lactate concentration was measured before and immediately after the GXTs. V˙O2max remained unchanged during the GXTs in load and unloaded conditions for both sexes (p>0.05). Test duration was significantly less in females during the GXT with 15% BW (15.9±0.51 min vs. 18.1±1.14 min; p = 0.014) and 20% BW load carriage (15.2±0.75 min vs. 18.1±1.14 min; p = 0.020), compared to the unloaded GXT. Males showed significant decrease in the test duration during the GXT with load 15% BW (20.5±0.53 min vs. 22.8±0.61 min; p = 0.047) and with 20% BW (19.6±0.42 min vs. 22.8±0.71 min; p = 0.004), compared to the GXT with 5% BW. V˙E statistically decreased in female subjects only at 15% BW compared to 20% BW (15% BW = 77.9 ± 10.5 L/min vs. 15% BW = 72.0 ± 10.9 L/min; p = 0.045). There was no difference observed in maximal HR and blood lactate concentration between the GXTs in load and unloaded conditions. This study indicates that no matter the load % used during the GXT, V˙O2max, but not total exercise time, remains the same in young males and females.

scholarly journals CHANGES IN PLASMA VOLUME AND BLOOD LACTATE CONCENTRATION AFTER EXERCISE TRAINING IN TYPE 2 DIABETICS

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S374
Author(s):  
F J. Diaz ◽  
M R. Garcia ◽  
T Franco ◽  
G Monta??o ◽  
F Moreno ◽  
...  
Keyword(s):  
Exercise Training ◽  
Blood Lactate ◽  
Plasma Volume ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Type 2 Diabetics

scholarly journals Core Temperature And Blood Lactate Kinetics After Graded Exercise Testing In The Heat

2020 ◽  
Vol 52 (7S) ◽  
pp. 970-970
Author(s):  
J. Luke Pryor ◽  
Robert G. Leija ◽  
Peter Lao ◽  
Canelaria Cruz ◽  
Sergio Perez ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Core Temperature ◽  
Exercise Testing ◽  
Lactate Kinetics ◽  
Graded Exercise Testing ◽  
Graded Exercise

scholarly journals A Comparison of Physiological Response to Incremental Testing on Stationary and Dynamic Rowing Ergometers

2021 ◽  
pp. 1-8
Author(s):  
Marie Boland ◽  
Nora May Crotty ◽  
Nick Mahony ◽  
Bernard Donne ◽  
Neil Fleming
Keyword(s):  
Anaerobic Threshold ◽  
Maximal Exercise ◽  
Minute Ventilation ◽  
Physiological Responses ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Graded Exercise Testing ◽  
Rowing Ergometer ◽  
Graded Exercise ◽  
Incremental Testing

Purpose: The purpose of the current study was to compare responses to graded exercise testing (GXT) on 2 popular commercial rowing ergometers. Methods: A cohort of 23 subelite male rowers (age 20 [2] y, height 1.88 [0.06] m, body mass 82.0 [8.8] kg) performed a GXT on both stationary (Concept2 [C2]) and dynamic (RowPerfect3 [RP3]) rowing ergometers. Physiological responses including oxygen consumption (VO2), heart rate (HR), blood lactate concentration (BLa), stroke rate (SR), and minute ventilation (VE) were recorded. BLa data were plotted graphically and anaerobic threshold was identified using the Dmax method. Workload, HR, and VO2 at Dmax were interpolated. Physiological responses at maximal exercise and at Dmax were compared, along with response across a discrete range of submaximal workloads. Results: At maximal exercise, no significant differences in HR, VO2, or BLa were observed (P > .05); however, VEpeak was significantly higher during RP3 tests (T = 2.943, P < .05). No significant differences in HR, VO2, or BLa at Dmax were observed (P > .05). When comparing across submaximal workloads, HR was significantly higher with the RP3 at 2 distinct workloads (210 and 240 W; P < .05), while SR was higher during RP3 testing at all workloads (F = 56.7, P < .05). When SR was fixed as a covariate, the effect of ergometer on HR response was not significant. A significant workload by ergometer interaction effect was observed for SR with higher data recorded on the RP3 (F = 3.48, P < .01). Levels of agreement for GXT-derived measures of anaerobic threshold (Dmax) were deemed unacceptable. Conclusions: These results indicate that while some differences in HR and VE response were observed between ergometers, these differences were a result of SR alterations between ergometer type. While no differences in response at Dmax were observed, the poor levels of agreement between ergometers suggests that prescription of GXT-derived threshold for training should ideally be specific to the rowing ergometer upon which the test was performed.

Angina Pectoris and Blood Lactate Concentration During Graded Exercise

1984 ◽  
Vol 05 (06) ◽  
pp. 348-351 ◽  
Author(s):  
J. Karlsson ◽  
H. Åström ◽  
A. Holmgren ◽  
C. Kaijser ◽  
E. Orinius
Keyword(s):  
Angina Pectoris ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Graded Exercise

scholarly journals Effect of nifedipine, dilazep, dinitrates and propranolol on blood lactate accumulation during intensive graded exercise testing in healthy young subjects.

1988 ◽  
Vol 29 (5) ◽  
pp. 617-630 ◽  
Author(s):  
Hiroaki TANAKA ◽  
Shuzo KUMAGAI ◽  
Munehiro SHINDO ◽  
Toyokazu YOSHIDA ◽  
Takashi MUTAGUCHI ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Exercise Testing ◽  
Lactate Accumulation ◽  
Graded Exercise Testing ◽  
Graded Exercise ◽  
Blood Lactate Accumulation ◽  
Young Subjects

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

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.

Effects of cocaine on incremental treadmill exercise in horses

1993 ◽  
Vol 75 (6) ◽  
pp. 2727-2733 ◽  
Author(s):  
K. H. McKeever ◽  
K. W. Hinchcliff ◽  
D. F. Gerken ◽  
R. A. Sams
Keyword(s):  
Right Ventricular ◽  
Blood Lactate ◽  
Venous Blood ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Ventricular Pressure ◽  
Mixed Venous Blood ◽  
Work Intensity ◽  
Venous Blood Lactate ◽  
Mixed Venous

Four mature horses were used to test the effects of two doses (50 and 200 mg) of intravenously administered cocaine on hemodynamics and selected indexes of performance [maximal heart rate (HRmax), treadmill velocity at HRmax, treadmill velocity needed to produce a blood lactate concentration of 4 mmol/l, maximal mixed venous blood lactate concentration, maximal treadmill work intensity, and test duration] measured during an incremental treadmill test. Both doses of cocaine increased HRmax approximately 7% (P < 0.05). Mean arterial pressure was 30 mmHg greater (P < 0.05) during the 4- to 7-m/s steps of the exercise test in the 200-mg trial. Neither dose of cocaine had an effect on the responses to exertion of right atrial pressure, right ventricular pressure, or maximal change in right ventricular pressure over time. Maximal mixed venous blood lactate concentration increased 41% (P < 0.05) with the 50-mg dose and 75% (P < 0.05) with the 200-mg dose during exercise. Administration of cocaine resulted in decreases (P < 0.05) in the treadmill velocity needed to produce a blood lactate concentration of 4 mmol/l from 6.9 +/- 0.5 and 6.8 +/- 0.9 m/s during the control trials to 4.4 +/- 0.1 m/s during the 200-mg cocaine trial. Cocaine did not alter maximal treadmill work intensity (P > 0.05); however, time to exhaustion increased by approximately 92 s (15%; P < 0.05) during the 200-mg trial.(ABSTRACT TRUNCATED AT 250 WORDS)

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