Complexity of knee extensor torque in patients with frailty syndrome: a cross-sectional study.
Braz J Phys Ther
; 24(1): 30-38, 2020.
Article
in En
| MEDLINE
| ID: mdl-30587398
ABSTRACT
BACKGROUND:
Frailty syndrome is characterized by a marked reduction in physiological reserves and a clinical state of vulnerability to stress. Torque complexity analysis could reveal changes in the musculoskeletal systems that are the result of having the syndrome.OBJECTIVE:
The aim of this study was to evaluate the complexity of submaximal isometric knee extensor torque in frail, pre-frail, and non-frail older adults. A secondary aim was to analyze the torque complexity behavior in different force levels in each group.METHODS:
A cross-sectional study was conducted. Forty-two older adults were divided into three groups non-frail (n=15), pre-frail (n=15), and frail (n=12). The data collected included body composition, five times sit-to-stand test, walking speed, and isometric knee extensor torque at 15, 30, and 40% of maximal voluntary contraction. The knee extensor torque variability was evaluated by coefficient of variation, and the torque complexity was evaluated by approximate entropy and sample entropy.RESULTS:
The frail group presented a reduction in body mass and peak torque value compared to the non-frail group. Also, the frail group showed worse physical performance (on the five times sit-to-stand test and walking speed) compared to the pre-frail and non-frail groups. In addition, the frail older adults showed reduced torque complexity compared to the non-frail group. Finally, the association between torque complexity and force levels remained similar in all groups.CONCLUSION:
Torque complexity is reduced in the presence of frailty syndrome.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Body Composition
/
Frail Elderly
/
Knee
Type of study:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limits:
Aged80
/
Humans
Language:
En
Journal:
Braz J Phys Ther
Journal subject:
MEDICINA FISICA
/
REABILITACAO
Year:
2020
Document type:
Article
Affiliation country:
Brasil
Publication country:
BR
/
BRASIL
/
BRASILE
/
BRAZIL
/
BRESIL