Comparison of Different Blood Lactate Threshold Concepts for Constant Load Performance Prediction in Spinal Cord Injured Handcyclists

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Comparison of Different Blood Lactate Threshold Concepts for Constant Load Performance Prediction in Spinal Cord Injured Handcyclists. / Stangier, Carolin; Abel, Thomas; Zeller, Sebastian; Quittmann, Oliver Jan; Perret, Claudio; Strüder, Heiko Klaus.

in: Frontiers in Physiology, Jahrgang 10, Nr. SEP, 1054, 01.09.2019, S. 1054.

Publikationen: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung

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@article{d1de121ceebf438ba402b8a7770b8eb5,
title = "Comparison of Different Blood Lactate Threshold Concepts for Constant Load Performance Prediction in Spinal Cord Injured Handcyclists",
abstract = "Background: Endurance capacity is one of the main performance determinants in handcycling. There are two exercise test procedures primarily applied to determine endurance capacity, to verify training adaptations and predict race performance. This study aims to evaluate the agreement of these applied concepts in handcycling. Methods: In a repeated measures cross-over design, 11 highly trained male spinal cord injured (Th12 to L1) handcyclists (age: 40 ± 9 years, height: 183 ± 8 cm, body mass: 73.2 ± 8.5 kg) performed a graded exercise test (GXT) and a lactate minimum test (LMT) to determine lactate threshold at 4 mmol L−1 (LT4 mmol L −1) and lactate minimum (LM), respectively. The agreement of both lactate thresholds concepts for constant load performance prediction (change of ≤ 1 mmol L−1 during the last 20 min) was evaluated within constant load tests (CLT; 30 min) at a power output (PO) corresponding to LT4 mmol L−1 and LM. Oxygen uptake (VO2), respiratory exchange ratio (RER), heart rate (HR) and blood lactate (La) were measured during all tests. Results: Power output at the corresponding thresholds (LT4 mmol L −1: 149 ± 34 W vs. LM: 137 ± 18 W) revealed no significant difference (p = 0.06). During the CLT at LT4mmol·L −1 and LM,VO2, and RPE were not significantly different. However, LA, RER, and HR were significantly higher (p ≤ 0.02) during CLT at LT4 mmol L −1. Bland– Altman plots indicate a wide range of dispersion for all parameters between both lactate threshold concepts. Evaluations of LT4 mmol L −1 and LM did not meet the criteria for constant load performance within the CLT for 33 and 17% of the athletes, respectively. Discussion: Both exercise tests and the corresponding lactate threshold concept revealed appropriate estimates to predict a steady state performance for the majority of participants. However, as PO determination at LT4 mmol L −1 and LM exceeds the criteria for constant load performance (increase of ≥ 1 mmol L−1) for 33 and 17% respectively the current results indicate the common criteria for constant load performance (change of ± 1 mmol L−1) might not be sufficiently precise for elite athletes in handcycling. Consequently, exercise test results of elite athletes should be analyzed individually and verified by means of several CLT.",
keywords = "endurance capacity, endurance exercise, graded exercise test, lactate minimum test, spinal cord injury",
author = "Carolin Stangier and Thomas Abel and Sebastian Zeller and Quittmann, {Oliver Jan} and Claudio Perret and Str{\"u}der, {Heiko Klaus}",
note = "Copyright {\textcopyright} 2019 Stangier, Abel, Zeller, Quittmann, Perret and Str{\"u}der.",
year = "2019",
month = sep,
day = "1",
doi = "10.3389/fphys.2019.01054",
language = "English",
volume = "10",
pages = "1054",
journal = "Frontiers in Physiology",
issn = "1664-042X",
publisher = "Frontiers Media S.A.",
number = "SEP",

}

RIS

TY - JOUR

T1 - Comparison of Different Blood Lactate Threshold Concepts for Constant Load Performance Prediction in Spinal Cord Injured Handcyclists

AU - Stangier, Carolin

AU - Abel, Thomas

AU - Zeller, Sebastian

AU - Quittmann, Oliver Jan

AU - Perret, Claudio

AU - Strüder, Heiko Klaus

N1 - Copyright © 2019 Stangier, Abel, Zeller, Quittmann, Perret and Strüder.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Background: Endurance capacity is one of the main performance determinants in handcycling. There are two exercise test procedures primarily applied to determine endurance capacity, to verify training adaptations and predict race performance. This study aims to evaluate the agreement of these applied concepts in handcycling. Methods: In a repeated measures cross-over design, 11 highly trained male spinal cord injured (Th12 to L1) handcyclists (age: 40 ± 9 years, height: 183 ± 8 cm, body mass: 73.2 ± 8.5 kg) performed a graded exercise test (GXT) and a lactate minimum test (LMT) to determine lactate threshold at 4 mmol L−1 (LT4 mmol L −1) and lactate minimum (LM), respectively. The agreement of both lactate thresholds concepts for constant load performance prediction (change of ≤ 1 mmol L−1 during the last 20 min) was evaluated within constant load tests (CLT; 30 min) at a power output (PO) corresponding to LT4 mmol L−1 and LM. Oxygen uptake (VO2), respiratory exchange ratio (RER), heart rate (HR) and blood lactate (La) were measured during all tests. Results: Power output at the corresponding thresholds (LT4 mmol L −1: 149 ± 34 W vs. LM: 137 ± 18 W) revealed no significant difference (p = 0.06). During the CLT at LT4mmol·L −1 and LM,VO2, and RPE were not significantly different. However, LA, RER, and HR were significantly higher (p ≤ 0.02) during CLT at LT4 mmol L −1. Bland– Altman plots indicate a wide range of dispersion for all parameters between both lactate threshold concepts. Evaluations of LT4 mmol L −1 and LM did not meet the criteria for constant load performance within the CLT for 33 and 17% of the athletes, respectively. Discussion: Both exercise tests and the corresponding lactate threshold concept revealed appropriate estimates to predict a steady state performance for the majority of participants. However, as PO determination at LT4 mmol L −1 and LM exceeds the criteria for constant load performance (increase of ≥ 1 mmol L−1) for 33 and 17% respectively the current results indicate the common criteria for constant load performance (change of ± 1 mmol L−1) might not be sufficiently precise for elite athletes in handcycling. Consequently, exercise test results of elite athletes should be analyzed individually and verified by means of several CLT.

AB - Background: Endurance capacity is one of the main performance determinants in handcycling. There are two exercise test procedures primarily applied to determine endurance capacity, to verify training adaptations and predict race performance. This study aims to evaluate the agreement of these applied concepts in handcycling. Methods: In a repeated measures cross-over design, 11 highly trained male spinal cord injured (Th12 to L1) handcyclists (age: 40 ± 9 years, height: 183 ± 8 cm, body mass: 73.2 ± 8.5 kg) performed a graded exercise test (GXT) and a lactate minimum test (LMT) to determine lactate threshold at 4 mmol L−1 (LT4 mmol L −1) and lactate minimum (LM), respectively. The agreement of both lactate thresholds concepts for constant load performance prediction (change of ≤ 1 mmol L−1 during the last 20 min) was evaluated within constant load tests (CLT; 30 min) at a power output (PO) corresponding to LT4 mmol L−1 and LM. Oxygen uptake (VO2), respiratory exchange ratio (RER), heart rate (HR) and blood lactate (La) were measured during all tests. Results: Power output at the corresponding thresholds (LT4 mmol L −1: 149 ± 34 W vs. LM: 137 ± 18 W) revealed no significant difference (p = 0.06). During the CLT at LT4mmol·L −1 and LM,VO2, and RPE were not significantly different. However, LA, RER, and HR were significantly higher (p ≤ 0.02) during CLT at LT4 mmol L −1. Bland– Altman plots indicate a wide range of dispersion for all parameters between both lactate threshold concepts. Evaluations of LT4 mmol L −1 and LM did not meet the criteria for constant load performance within the CLT for 33 and 17% of the athletes, respectively. Discussion: Both exercise tests and the corresponding lactate threshold concept revealed appropriate estimates to predict a steady state performance for the majority of participants. However, as PO determination at LT4 mmol L −1 and LM exceeds the criteria for constant load performance (increase of ≥ 1 mmol L−1) for 33 and 17% respectively the current results indicate the common criteria for constant load performance (change of ± 1 mmol L−1) might not be sufficiently precise for elite athletes in handcycling. Consequently, exercise test results of elite athletes should be analyzed individually and verified by means of several CLT.

KW - endurance capacity

KW - endurance exercise

KW - graded exercise test

KW - lactate minimum test

KW - spinal cord injury

UR - https://www.mendeley.com/catalogue/fe483b46-a472-35f3-a8e6-39f47d66c8a8/

U2 - 10.3389/fphys.2019.01054

DO - 10.3389/fphys.2019.01054

M3 - Journal articles

C2 - 31611803

VL - 10

SP - 1054

JO - Frontiers in Physiology

JF - Frontiers in Physiology

SN - 1664-042X

IS - SEP

M1 - 1054

ER -

ID: 4732743