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VALIDITY OF LACTATE THRESHOLDS IN INLINE-SPEEDSKATING.
MedLine Citation:
PMID:  23439347     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: Lactate thresholds are commonly used as estimates of the highest workload where lactate production and elimination are in equilibrium (MLSS). However, due to the high static load on propulsive muscles, lactate kinetics in inline-speedskating may differ significantly from other endurance exercise modes. Therefore, the discipline-specific validity of lactate thresholds has to be verified. 16 competitive inline-speedskaters (age: 30 ± 10 years; training per week: 10 ± 4 h) completed an exhaustive stepwise incremental exercise test (start 24 km*h, step duration 3 min, increment 2 km*h) to determine individual anaerobic threshold (IAT) and the workload corresponding to a blood lactate concentration of 4 mmol*l (LT4) as well as 2-5 continuous load tests of (up to) 30 min to determine MLSS. IAT and LT4 correlated significantly with MLSS and mean differences were almost negligible (MLSS 29.5 ± 2.5 km*h; IAT 29.2 ± 2.0 km*h; LT4 29.6 ± 2.3 km*h; p>0,1 for all differences). However, the variability of differences was considerable resulting in 95% limits of agreement in the upper range of values known from other endurance disciplines (2.6 km*h (8.8 %) for IAT and 3.1 km*h (10.3 %) for LT4). Consequently IAT and LT4 may be considered as valid estimates of MLSS in inline-speedskating, but verification by means of a constant load test should be considered in cases of doubt or when optimal accuracy is needed (e.g. in elite athletes or scientific studies).
Authors:
Anne Hecksteden; Tobias Heinze; Oliver Faude; Wilfried Kindermann; Tim Meyer
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-22
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Institute of Sports- and Preventive Medicine, Saarland University, Saarbrücken, Germany 2University of Basel, Institute of Exercise and Health Sciences, Basel, Switzerland.
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