Software for calculating blood lactate endurance markers

Newell, John; Higgins, David; Madden, Niall; Cruickshank, James; Einbeck, Jochen; McMillan, Kenny; McDonald, Roddy

doi:10.1080/02640410601128922

Cited by 123 publications

(75 citation statements)

References 26 publications

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“…The subject's velocity at V ・ O2max (vV ・ O2max) was calculated by substituting the V ・ O2max into the velocity-V ・ O2 regression equation. The velocity at the LT (vLT) was determined using the lactate threshold decision method (Lactate-E) by Newell et al 7) . The LT intensity (LTI) was determined from vLT and vV ・ O2max.…”

Section: Methodsmentioning

confidence: 99%

Relationship between 800-m running performance and running economy during high-intensity running in well-trained middle-distance runners

Tanji

Tsuji

Shimazu

et al. 2017

JPFSM

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Running economy (RE) at an intensity above the lactate threshold (LT) is reported to be the most important aerobic capacity for estimating 1,500-m running performance. The reason that the RE at intensity better reflects the energy metabolism during a 1,500-m run, is that it is performed above the LT intensity running. This study clarified the relationship between an 800-m run, which is performed above the LT intensity, and aerobic capacities, including the RE measured at intensities below and above the LT. This study included 12 well-trained male middle-distance runners (800-m velocity: 25.5 ± 0.5 km·h −1 , LT intensity: 79.7 ± 5.1% maximal oxygen uptake [V ・ O2max]). Both the RE of below and above the LT intensity were calculated at 65%V ・ O2max (RE 65 ) and 90%V ・ O2max (RE90). The 800-m velocity was not related to the V ・ O2max or the LT intensity (r = -0.16 and -0.10, respectively). This velocity correlated with both RE90 and RE65, with the correlation coefficient being higher for RE90 (r = -0.80 vs -0.75). Furthermore, the coefficient of determination for the 800-m velocity determined from V ・ O2max, LT intensity and RE90 was higher than that determined from V ・ O2max, LT intensity and RE65(R 2 = 0.522 vs 0.428, P = 0.03 vs 0.06). Based on these results, we concluded that the RE at an intensity above the LT might be better than other aerobic capacities for estimating the 800-m running performance, and more than 50% of this performance can be explained by V ・ O2max, LT intensity and RE at an intensity above the LT.

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Section: Methodsmentioning

confidence: 99%

Relationship between 800-m running performance and running economy during high-intensity running in well-trained middle-distance runners

Tanji

Tsuji

Shimazu

et al. 2017

JPFSM

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“…Whole blood samples were immediately analyzed in duplicate for lactate concentration using an automated analyzer (YSI 2300 STAT, Yellow Springs, OH). The LT was defined as the first workload that elicited a Ͼ1 mM increase in venous blood lactate concentration (23) and was calculated using Lactate-E version 2.0 software (66). The W peak was determined as previously described (46).…”

Section: Preliminary Testingmentioning

confidence: 99%

Concurrent exercise incorporating high-intensity interval or continuous training modulates mTORC1 signaling and microRNA expression in human skeletal muscle

Fyfe

Bishop

Zacharewicz

et al. 2016

American Journal of Physiology-Regulatory, Integrative and Comp

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Fyfe JJ, Bishop DJ, Zacharewicz E, Russell AP, Stepto NK. Concurrent exercise incorporating high-intensity interval or continuous training modulates mTORC1 signaling and microRNA expression in human skeletal muscle. Am J Physiol Regul Integr Comp Physiol 310: R1297-R1311, 2016. First published April 13, 2016 doi:10.1152/ajpregu.00479.2015.-We compared the effects of concurrent exercise, incorporating either high-intensity interval training (HIT) or moderate-intensity continuous training (MICT), on mechanistic target of rapamycin complex 1 (mTORC1) signaling and microRNA expression in skeletal muscle, relative to resistance exercise (RE) alone. Eight males (mean Ϯ SD: age, 27 Ϯ 4 yr; V O2 peak, 45.7 Ϯ 9 ml·kg Ϫ1 ·min Ϫ1 ) performed three experimental trials in a randomized order: 1) RE (8 ϫ 5 leg press repetitions at 80% 1-repetition maximum) performed alone and RE preceded by either 2) HIT cycling [10 ϫ 2 min at 120% lactate threshold (LT); HIT ϩ RE] or 3) work-matched MICT cycling (30 min at 80% LT; MICT ϩ RE). Vastus lateralis muscle biopsies were obtained immediately before RE, either without (REST) or with (POST) preceding endurance exercise and ϩ1 h (RE ϩ 1 h) and ϩ3 h (RE ϩ 3 h) after RE. Prior HIT and MICT similarly reduced muscle glycogen content and increased ACC Ser79 and p70S6K Thr389 phosphorylation before subsequent RE (i.e., at POST). Compared with MICT, HIT induced greater mTOR Ser2448 and rps6 Ser235/236 phosphorylation at POST. REinduced increases in p70S6K and rps6 phosphorylation were not influenced by prior HIT or MICT; however, mTOR phosphorylation was reduced at RE ϩ 1 h for MICT ϩ RE vs. both HIT ϩ RE and RE. Expression of miR-133a, miR-378, and miR-486 was reduced at RE ϩ 1 h for HIT ϩ RE vs. both MICT ϩ RE and RE. Postexercise mTORC1 signaling following RE is therefore not compromised by prior HIT or MICT, and concurrent exercise incorporating HIT, but not MICT, reduces postexercise expression of miRNAs implicated in skeletal muscle adaptation to RE. concurrent training; interference; exercise intensity; high-intensity interval training; continuous training INCORPORATING BOTH RESISTANCE (RE) and endurance exercise into a periodized training program is termed concurrent training (56). Compared with undertaking RE alone, concurrent training attenuates skeletal muscle hypertrophy and maximal strength development in some (10,19,33,48,53), but not all (5,58,63,75,76), studies. Given that skeletal muscle mass plays an important role in overall metabolic health (87), and many athletes require elements of strength and muscle hypertrophy, concomitantly with a high aerobic capacity (47), minimizing interference during concurrent training has implications for optimizing both health and performance outcomes.

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“…8 Of these markers, the D2L max was more reproducible for 4 min stages, and similar reproducibility was seen between D2L max , the LT and log-log LT for 8 min stages.…”

Section: Resultsmentioning

confidence: 80%

“…7 To characterise a curvilinear blood lactate response, various endurance markers and single summary statistics have been proposed. 8 Given the ease with which lactate can be measured, it is important to recognise the associated measurement error for a particular marker and how this influences the lactateworkload relationship for incremental exercise.…”

Section: Introductionmentioning

confidence: 99%

Reproducibility of lactate markers during 4 and 8min stage incremental running: A pilot study

Gavin

Willems

Myers

2014

Journal of Science and Medicine in Sport

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word count: 250Figures: 2 Tables: 1 2 Objective: This study examined the reproducibility of speed corresponding to specific lactate markers during incremental treadmill running of normal and prolonged stage durations. Design: Nineteen healthy participants (14 male, 5 female) performed repeated, incremental treadmill running trials of 4 and 8 min stages on separate days to examine the test-retest reproducibility of speed at lactate markers.Two trials were completed for each duration in a randomised order. Method: Fingertip blood samples drawn upon stage completion were analysed for plasma lactate, then used to determine running speed at: 2.0, 3.5, and 4.0 mmol·l -1 fixed blood lactate accumulations (FBLA), a 1 mmol·l -1 rise from baseline, and the markers: the deviation maximum (D max ), the D max of the second curve derivative (D2L max ), the lactate threshold (LT) and log-log LT.

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Software for calculating blood lactate endurance markers

Cited by 123 publications

References 26 publications

Relationship between 800-m running performance and running economy during high-intensity running in well-trained middle-distance runners

Relationship between 800-m running performance and running economy during high-intensity running in well-trained middle-distance runners

Concurrent exercise incorporating high-intensity interval or continuous training modulates mTORC1 signaling and microRNA expression in human skeletal muscle

Reproducibility of lactate markers during 4 and 8min stage incremental running: A pilot study

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