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Maximal Lactate Steady State and Lactate Thresholds in the Cross-country Skiing Sub-technique Double Poling
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Sports medicine.
2016 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Lactate threshold tests are used when determining endurance performance. The Maximal Lactate Steady State (MLSS) defines the highest blood lactate concentration and workload that can be maintained over time without an accumulation of blood lactate. The purpose of this study was to investigate the MLSS in the cross-country skiing sub-technique double poling and the validity of a fixed blood lactate threshold (OBLA4 and the 45° tangent). Eight well-trained cross-country skiers (age 27.6±8.8 years, body mass 73.9±6.2 kg, length 179.3±7.0 cm) performed one incremental test to determine OBLA4 and ILaT45 and several constant workload tests of 30 minutes to determine the MLSS. Lactate concentration at MLSS in double poling was 6.0±2.4 mmol/L which is significantly different from OBLA4 (p<0.05, ES = 1.2). Despite significant correlations in threshold velocities (r=0.84/0.95/0.94, p<0.01), significant (p<0.01) differences between MLSS (21.4±2.8 km/h) versus ILaT45 (20.6±3.6 km/h) and OBLA4 (19.9±3.0 km/h) was observed. It is concluded that both OBLA4 and ILaT45 underestimate MLSS velocity in double poling. Direct determination of MLSS is necessary to approach true exercise thresholds, important for training interventions. 

Place, publisher, year, edition, pages
2016. , 59 p.
Keyword [en]
Onset of Blood Lactate Accumulation, Anaerobic Threshold, Exercise Test, Sub Maximal Exercise, Exercise Intensity
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:umu:diva-131461OAI: oai:DiVA.org:umu-131461DiVA: diva2:1074267
Educational program
Master program in Sports Medicine
Supervisors
Examiners
Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2017-02-15Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf