Influence of obstructive sleep apnea syndrome in the fluctuation of the submaximal isometric torque of knee extensors in patients with early-grade osteoarthritis
Braz. j. phys. ther. (Impr.)
;
19(4): 271-278, July-Aug. 2015. tab, ilus
Article
in English
| LILACS
| ID: lil-761614
ABSTRACT
OBJECTIVE:
The aim of this study was to investigate whether obstructive sleep apnea (OSA) alters the fluctuation of submaximal isometric torque of the knee extensors in patients with early-grade osteoarthritis (OA).METHOD:
The study included 60 male volunteers, aged 40 to 70 years, divided into four groups Group 1 (G1) - Control (n=15) without OA and without OSA; Group 2 (G2) (n=15) with OA and without OSA; Group 3 (G3) (n=15) without OA and with OSA; and Group 4 (G4) (n=15) with OA and with OSA. Five patients underwent maximal isometric contractions of 10 seconds duration each, with the knee at 60° of flexion to determine peak torque at 60°. To evaluate the fluctuation of torque, 5 submaximal isometric contractions (50% of maximum peak torque) of 10 seconds each, which were calculated from the standard deviation of torque and coefficient of variation, were performed.RESULTS:
Significant differences were observed between groups for maximum peak torque, while G4 showed a lower value compared with G1 (p=0.005). Additionally, for the average torque exerted, G4 showed a lower value compared to the G1 (p=0.036). However, no differences were found between the groups for the standard deviation (p=0.844) and the coefficient of variation (p=0.143).CONCLUSION:
The authors concluded that OSA did not change the parameters of the fluctuation of isometric submaximal torque of knee extensors in patients with early-grade OA.
Full text:
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Index:
LILACS (Americas)
Main subject:
Osteoarthritis
/
Sleep Apnea, Obstructive
/
Isometric Contraction
/
Knee
Limits:
Humans
Language:
English
Journal:
Braz. j. phys. ther. (Impr.)
Journal subject:
MEDICINA FISICA E REABILITACAO
Year:
2015
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal de São Carlos/BR
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