Document Detail

Seasonal variations in VO2max, O2-cost, O2-deficit and performance in elite cross-country skiers.
MedLine Citation:
PMID:  22996025     Owner:  NLM     Status:  Publisher    
ABSTRACT: Long term effects of training are important information for athletes, coaches and scientists when associating changes in physiological indices with changes in performance. Therefore, this study monitored changes in aerobic and anaerobic capacities and performance in a group of elite cross-country skiers during a full sport season. Thirteen male (age; 23 ± 2 yrs, height; 182 ± 6 cm, body-mass; 76 ± 8 kg, V2 roller ski skating VO2max; 79.3 ± 4.4 mL·kg min or 6.0 ± 0.5 L·min) were tested during the early-, middle- and late preparation phase: June (T1) - August (T2) - October (T3), during the competition phase: January/February (T4) and the following early pre-competition phase: June (T5). O2-cost during submaximal efforts and VO2peak, accumulated oxygen deficit (ΣO2-deficit) and performance during a 1000m test were determined in the V2 ski skating technique on a rollerski treadmill. Subjects performed their training on an individual basis and detailed training logs were categorized into different intensity zones and exercise modes. Total training volume was highest during the summer months (early preseason) and decreased towards and through the winter season, while the volume of high intensity training increased (all P < 0.05). There was a significant main effect among testing sessions for 1000 m time, O2-cost and ΣO2-deficit (Cohen`s d effect size; ES = 0.63-1.37, moderate - large, all P < 0.05). In general, the changes occurred between T1 and T3 with minor changes in the competitive season (T3-T4). No significant changes were found in VO2peak across the year (ES = 0.17, trivial). In conclusion, the training performed by elite cross-country skiers induced no significant changes in VO2peak, but improved performance, O2-cost and ΣO2-deficit.
Thomas Losnegard; Håvard Myklebust; Matt Spencer; Jostein Hallén
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-19
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:  2012 Sep 
Date Detail:
Created Date:  2012-9-21     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:  -    
Norwegian research centre for training and performance, Department of physical performance, Norwegian School of Sport Sciences, Oslo, Norway.
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