Document Detail

Isokinetic versus one-repetition maximum strength assessment in chronic heart failure.
MedLine Citation:
PMID:  20421831     Owner:  NLM     Status:  In-Process    
PURPOSE: Reduction in exercise capacity in patients with chronic heart failure (CHF) has been partially attributed to decreased muscle strength. Training studies reported important variations in strength increases during rehabilitation, ranging between 5% and 70% and depending on the measurement technique: isokinetic dynamometry or the one-repetition maximum (1RM) methods. Therefore, the question arises if both techniques assess the changes in muscle strength in a comparable way.
METHODS: Thirty patients with CHF, New York Heart Association class II-III, with mean baseline VO2peak of 14.8 +/-3.0 mL x kg(-1) x min(-1) and mean baseline left ventricular ejection fraction of 23.5% T 5.5%, were assessed for knee extensor and knee flexor strength before and after 40 training sessions by isokinetic dynamometry and 1RM method. These two strength measurement techniques were compared using the Bland and Altman method for agreement.
RESULTS: Knee extensor muscle strength increased by 7.4% and knee flexor strength increased by 18.7% if measured by isokinetic testing. With the 1RM method, knee extensor and flexor strength increased by 36% and 100%, respectively. Both techniques were not in agreement for muscle strength assessment; improvements were more important with the 1RM method. Furthermore, statistical analysis showed that the 1RM technique was overestimating strength increases in comparison with isokinetic evaluation, especially for higher strength levels.
CONCLUSIONS: In the follow-up of exercise training programs in patients with CHF, isokinetic measurements should be preferentially used to limit bias between measurements at different times.
Patrick Feiereisen; Michel Vaillant; Daisy Eischen; Charles Delagardelle
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  42     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2156-63     Citation Subset:  IM; S    
Cardiology Department, Centre Hospitalier de Luxembourg, Luxembourg.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Dynamic postural stability in females with chronic ankle instability.
Next Document:  Long-term physical activity and inflammatory biomarkers in older adults.