Reliability and Validity of the Lactate Pro 2 Analyzer

Crotty, Nora May; Boland, Marie; Mahony, Nicholas; Donne, B.; Fleming, Neil

doi:10.1080/1091367x.2020.1865966

Cited by 23 publications

(17 citation statements)

References 15 publications

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“…For the purposes of comparing the agreement between ergometers, acceptable 95% LoAs were set at 13 W for load at D max , 15 3 beats•min −1 for HR at D max , 2 mL•kg −1 •min −1 for VO 2 at D max , and 0.4 mmol•L −1 for BLa at D max . 16 These criterion LoA for assessed variables were derived from published test-retest reliability for Functional Threshold Power in cyclists, 15 and interdevice agreement between Lactate Pro 2 analyzers during a parallel incremental testing study in the same cohort of rowers. 16…”

Section: Discussionmentioning

confidence: 99%

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

Boland¹,

Crotty²,

Mahony³

et al. 2022

International Journal of Sports Physiology and Performance

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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.

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Section: Discussionmentioning

confidence: 99%

“…16 These criterion LoA for assessed variables were derived from published test-retest reliability for Functional Threshold Power in cyclists, 15 and interdevice agreement between Lactate Pro 2 analyzers during a parallel incremental testing study in the same cohort of rowers. 16…”

Section: Discussionmentioning

confidence: 99%

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

Boland¹,

Crotty²,

Mahony³

et al. 2022

International Journal of Sports Physiology and Performance

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“…Blood lactate concentration was measured at rest and at 1 min-walking intervals in between the exercise bouts. Blood samples were taken from the left jugular vein and whole blood lactate concentration was immediately determined by a hand-held lactate analyser (Lactate Pro 2, Axon Lab AG ® ) ( Arratibel-Lmaz et al, 2017 ; Crotty et al, 2021 ).…”

Section: Methodsmentioning

confidence: 99%

Profiling the Aerobic Window of Horses in Response to Training by Means of a Modified Lactate Minimum Speed Test: Flatten the Curve

et al. 2022

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There is a great need for objective external training load prescription and performance capacity evaluation in equestrian disciplines. Therefore, reliable standardised exercise tests (SETs) are needed. Classic SETs require maximum intensities with associated risks to deduce training loads from pre-described cut-off values. The lactate minimum speed (LMS) test could be a valuable alternative. Our aim was to compare new performance parameters of a modified LMS-test with those of an incremental SET, to assess the effect of training on LMS-test parameters and curve-shape, and to identify the optimal mathematical approach for LMS-curve parameters. Six untrained standardbred mares (3–4 years) performed a SET and LMS-test at the start and end of the 8-week harness training. The SET-protocol contains 5 increments (4 km/h; 3 min/step). The LMS-test started with a 3-min trot at 36–40 km/h [until blood lactate (BL) > 5 mmol/L] followed by 8 incremental steps (2 km/h; 3 min/step). The maximum lactate steady state estimation (MLSS) entailed >10 km run at the LMS and 110% LMS. The GPS, heartrate (Polar®), and blood lactate (BL) were monitored and plotted. Curve-parameters (R core team, 3.6.0) were (SET) VLa1.5/2/4 and (LMS-test) area under the curve (AUC>/<LMS), LMS and Aerobic Window (AW) via angular vs. threshold method. Statistics for comparison: a paired t-test was applied, except for LMS: paired Wilcoxon test; (p < 0.05). The Pearson correlation (r > 0.80), Bland-Altman method, and ordinary least products (OLP) regression analyses were determined for test-correlation and concordance. Training induced a significant increase in VLa1.5/2/4. The width of the AW increased significantly while the AUC</>LMS and LMS decreased post-training (flattening U-curve). The LMS BL steady-state is reached earlier and maintained longer after training. BLmax was significantly lower for LMS vs. SET. The 40° angular method is the optimal approach. The correlation between LMS and VMLSS was significantly better compared to the SET. The VLa4 is unreliable for equine aerobic capacity assessment. The LMS-test allows more reliable individual performance capacity assessment at lower speed and BL compared to SETs. The LMS-test protocol can be further adapted, especially post-training; however, inducing modest hyperlactatemia prior to the incremental LMS-stages and omitting inclusion of a per-test recovery contributes to its robustness. This LMS-test is a promising tool for the development of tailored training programmes based on the AW, respecting animal welfare.

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“…Lactate concentrations were measured in a capillary blood sample obtained from participants’ fingertips using a portable analyzer (Lactate 2, Arkray, Kyoto, Japan) [ 31 , 32 ].…”

Section: Methodsmentioning

confidence: 99%

Effects of Acute Vitamin C plus Vitamin E Supplementation on Exercise-Induced Muscle Damage in Runners: A Double-Blind Randomized Controlled Trial

et al. 2022

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Considering the existing controversy over the possible role of acute antioxidant vitamins in reducing exercise-induced muscle damage (EIMD), this doubled-blind, randomized and controlled trial aimed to determine whether supplementation with vitamins C and E could mitigate the EIMD in endurance-trained runners (n = 18). The exercise protocol involved a warm-up followed by 6 to 8 bouts of 1 km running at 75% maximum heart rate (HRmax). Two hours before the exercise protocol, participants took the supplementation with vitamins or placebo, and immediately afterwards, blood lactate, rate of perceived exertion and performance were assessed. At 24 h post-exercise, CK, delayed onset muscle soreness and performance were determined (countermovement jump, squat jump and stiffness test). The elastic index and vertical stiffness were calculated using a stiffness test. Immediately after the exercise protocol, all participants showed improved maximum countermovement jump, which only persisted after 24 h in the vitamin group (p < 0.05). In both groups, squat jump height was significantly greater (p < 0.05) immediately after exercise and returned to baseline values after 24 h. The elastic index increased in the vitamin group (p < 0.05), but not in the placebo group. In both groups, lactate levels increased from pre- to immediately post-exercise (p < 0.05), and CK increased from pre- to 24 h post-exercise (p < 0.05). No significant differences between groups were observed in any of the variables (p > 0.05). Vitamin C and E supplementation does not seem to help with EIMD in endurance-trained individuals.

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Reliability and Validity of the Lactate Pro 2 Analyzer

Cited by 23 publications

References 15 publications

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

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

Profiling the Aerobic Window of Horses in Response to Training by Means of a Modified Lactate Minimum Speed Test: Flatten the Curve

Effects of Acute Vitamin C plus Vitamin E Supplementation on Exercise-Induced Muscle Damage in Runners: A Double-Blind Randomized Controlled Trial

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