scholarly journals Relationship of Phase Angle, Echo Intensity, and Muscle Thickness with Isokinetic Knee Extensor Strength and Associated Motor Functions in Young Adults

2021 ◽  
Author(s):  
Tomoyuki Yamauchi ◽  
Takumi Yamada
Keyword(s):  
Phase Angle ◽  
Gait Speed ◽  
Alternative Assessment ◽  
Knee Extensor ◽  
Muscle Thickness ◽  
Alternative Methods ◽  
Echo Intensity ◽  
Cross Sectional ◽  
Motor Functions ◽  
Knee Extensor Strength

Abstract Background: There is no comprehensive report on quadriceps femoris muscle parameters’ association with isokinetic knee extensor strength, and no study has comprehensively clarified the relationship with motor function. To investigate the relation of isokinetic knee extensor strength and motor functions with phase angle, muscle echo intensity, and muscle thickness, to find alternative methods for knee extensor strength assessment. Methods: This cross-sectional study evaluated the associations between phase angle (PA) (measured using bioelectrical impedance analysis), muscle echo intensity (EI), and muscle thickness (MT) (measured using ultrasound) and isokinetic knee extensor strength (measured as maximum torque at 60 degree/s using an isokinetic dynamometer), and motor functions evaluated by gait speed (usual and maximum), five chair stands time, and stand up score.Results: The study comprised of 33 young healthy adults (12 males and 21 females; mean age, 22.2 years). Both sexes showed a significant correlation between isokinetic knee extensor strength and PA (males, r = 0.65, females, r = 0.54), muscle EI (males, r = -0.53, females, r = -0.54), and MT (males, r = 0.34, females, r = 0.38). In addition, a significant correlation was found between PA and maximum gait speed (males, r = 0.64, females, r = 0.44), five chair stands time (males, r = -0.69, females, r = -0.62), and stand up score (females, r = 0.45), and between muscle EI and maximum gait speed (males, r = -0.34, females, r = -0.42), five chair stands time (males, r = 0.37, females, r = 0.33), and stand up score (females, r = -0.30).Conclusions: The study suggests the potential of phase angle and muscle echo intensity as alternative assessment methods for isokinetic knee extensor strength.

scholarly journals Work Ability and Employment in Rheumatoid Arthritis: A Cross-Sectional Study on the Role of Muscle Strength and Lower Extremity Function

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Carolin Berner ◽  
Sandra Haider ◽  
Igor Grabovac ◽  
Thomas Lamprecht ◽  
Karl Heinrich Fenzl ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Lower Extremity ◽  
Work Ability ◽  
Employment Status ◽  
Knee Extensor ◽  
Lower Extremity Function ◽  
Cross Sectional ◽  
Hand Grip ◽  
Extremity Function ◽  
Knee Extensor Strength

Objective. The aim of the present study was to assess the association between muscle strength, lower extremity function, employment status, and work ability in RA patients. Methods. One hundred seropositive RA outpatients of working age were included in this cross-sectional study. Employment status was assessed by interview and work ability by the Work Ability Index-Single Item Scale (WAS). Muscle strength was determined using dynamometer measurement of isometric hand grip and knee extensor strength. Lower extremity function was measured using the short physical performance battery (SPPB). Regression models estimate the association between unemployment, work ability and muscle strength, and lower extremity function, controlling for sociodemographic and disease-related factors. Results. Forty-one percent of the RA patients were not gainfully employed, and their median work ability had a good WAS value (7.00 [4.00-7.00]). Patients with better knee extensor strength (OR=1.07, 95% CI [1.02-1.12) and better physical performance (OR=1.71, 95% CI [1.18-2.49]) had a significantly better chance of gainful employment. The odds for hand grip strength remained significant when adjusted for sociodemographic (OR=1.5, 95% CI [1.00-1.09]), but not for disease-specific variables. Better hand grip strength (β=0.25, p=0.039) and better knee extensor strength (β=0.45, p=0.001) as well as better lower extremity function (SPPB) (β=0.51, p<0.001) remained significantly associated with work ability following adjustment for sociodemographic and disease-specific variables. Conclusions. The association of employment status and work ability with parameters of physical fitness suggests that improvement in muscle strength and lower extremity function may positively influence work ability and employment in individuals with RA.

scholarly journals Should We Use Unilateral or Bilateral Tasks to Assess Maximal and Explosive Knee Extensor Strength in Patients with Knee Osteoarthritis? A Cross-Sectional Study

2021 ◽  
Vol 10 (19) ◽  
pp. 4353
Author(s):  
Jonas Pfeifle ◽  
David Hasler ◽  
Nicola Maffiuletti
Keyword(s):  
Knee Osteoarthritis ◽  
Clinical Relevance ◽  
Knee Extensor ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Strength Performance ◽  
Explosive Strength ◽  
Knee Extensor Strength ◽  
And Performance ◽  
Voluntary Contractions

Deficits in maximal and explosive knee extensor strength, which are usually assessed with unilateral tasks, are substantial in patients with knee osteoarthritis (KOA). The aim of this study was to investigate the clinical relevance of unilateral vs. bilateral tasks for assessing knee extensor strength in patients with KOA. This was achieved primarily by comparing unilateral and bilateral inter-limb strength asymmetries and secondarily by examining the relationship between unilaterally and bilaterally measured strength, and performance-based and self-reported function. Twenty-four patients with unilateral KOA (mean age: 65 ± 7 years) performed isometric gradual and explosive maximal voluntary contractions to assess, respectively their maximal and explosive strength. Performance-based and self-reported function were also evaluated with standard functional tests and questionnaires, respectively. Inter-limb asymmetries of maximal and explosive strength did not differ significantly between unilateral (mean asymmetry: 26 ± 15%) and bilateral tasks (22 ± 21%). In the same way, the relationships between knee extensor strength—measured either unilaterally or bilaterally—and performance-based or self-reported function were not influenced by the type of task. In conclusion, it does not seem to make a difference in terms of clinical relevance whether maximal and explosive knee extensor strength are evaluated with unilateral or bilateral tasks in KOA patients.

MO616GAIT SPEED AND BODY COMPOSITION IN HAEMODIALYSIS PATIENTS

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Barbara Cancho Castellano ◽  
Cristina López Arnaldo ◽  
Jorge Alberto Rodriguez Sabillon ◽  
Rafael Aragón Lara ◽  
Álvaro Álvarez López ◽  
...  
Keyword(s):  
Body Composition ◽  
Linear Relationship ◽  
Phase Angle ◽  
Gait Speed ◽  
Cell Mass ◽  
Venous Catheter ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Physiological Capacity ◽  
Day Of The Week

Abstract Background and Aims Gait speed is a predictor of disability, mobility limitation and mortality. Buchner et al. the first to observe a non-linear relationship between leg strength and normal gait speed. This relationship was explained as small changes in physiological capacity. The objective of this study is to assess the relationship between gait speed and body composition in haemodialysis. Method Cross-sectional study in 40 subjects with CKD in hospital haemodialysis, 70.5±13.03 years, 62.5% male. 40% Diabetic Nephropathy, 10% Glomerulopathies, 7.5% Nephroangiosclerosis, 2.5% Chronic Tubule-Interstitial Nephropathies, 32.5% Unknown, 2.5% Others. 35% arteriovenous fistula, 10% arteriovenous graft, 55% central venous catheter. Haemodialysis type: 40% High Flux, 45% Online postdilutional Haemodiafiltration, 10% Acetate Free Biofiltration. Gait seed was measured on the middle day of the week, predialysis. Body composition was estimated by monofrecuency bioimpedance measurement (50 KHz) on the middle day of the week, posthemodiálisis. Statistical analysis was performed with SPSS 13.0. Results Average gait speed 0.6±0.38 m/s, median 0.65 (IQR 0.18) m/s, range (0, 1.23) m/s. The prevalence of a gait speed less than or equal to 0.8 m/s was 67.5%, while 32.5% of the patients presented a gait speed less than or equal to 0.8 m/s. Gait speed was lower among diabetics (0.77±0.3 vs 0.46±0.39, p=0.0074). A positive and significant correlation was observed between gait speed and phase angle. No correlation was observed between gait speed and body fat. A positive linear relationship or dependence was observed between gait speed and muscle mass and cell mass. In relation to body water, a negative linear relationship is observed with the EW/IW ratio. Table 1. Conclusion There is a dependent relationship between gait speed and diabetes in haemodialysis patients. The decrease of the phase angle, the increase of the ratio EW/IW changes with the decrease the cell mass index are inversely related to the gait speed in haemodialysis patients. These items and the gait speed, which provide information on the state of vulnerability of the patient, could be markers of frailty.

scholarly journals Effects of Rest Position on Morphology of the Vastus Lateralis and Its Relationship with Lower-Body Strength and Power

2019 ◽  
Vol 4 (3) ◽  
pp. 64 ◽  
Author(s):  
Alyssa N. Varanoske ◽  
Nicholas A. Coker ◽  
Bri-Ana D.I. Johnson ◽  
Tal Belity ◽  
Gerald T. Mangine ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Morphological Characteristics ◽  
Muscle Thickness ◽  
Lower Body ◽  
Echo Intensity ◽  
Cross Sectional ◽  
Performance Variables ◽  
Body Strength ◽  
And Performance ◽  
Subcutaneous Adipose

Ultrasonography of the lower body typically encompasses supine rest due to fluid shifts affecting tissue size and composition. However, vastus lateralis (VL) examination is completed in the lateral recumbent position, and this positional change may influence morphology and its ability to predict function. This study aimed to examine the effect of position on VL morphology and its relationship with lower-body performance. Cross-sectional area (CSA), muscle thickness (MT), pennation angle (PA), echo intensity (UnCorEI), subcutaneous adipose tissue thickness (SFT), and echo intensity corrected for SFT (CorEI) were assessed in 31 resistance-trained males (23.0 ± 2.1 yrs; 1.79 ± 0.08 m; 87.4 ± 11.7 kg) immediately after transitioning from standing to supine (IP), after 15 min of standing (ST), and after 15 min of rest in three recumbent positions: supine (SUP), dominant lateral recumbent (DLR), non-dominant lateral recumbent (NDLR). Participants also completed unilateral vertical jumps, isometric/isokinetic tests, and a one-repetition maximum leg press. CSA, MT, PA, and SFT were greater in ST compared to NDLR, DLR, and SUP (p < 0.05). CSA, UnCorEI, and CorEI were different between recumbent positions; however no differences were observed for MT, PA, and SFT. Different magnitudes of relationships were observed between muscle morphological characteristics measured after rest in different positions and performance variables. Muscle morphology in IP generally appears to be the best predictor of performance for most variables, although utilizing the NDLR and DLR positions may provide comparable results, whereas morphology measured in ST and SUP provide weaker relationships with physical performance. IP also requires less time and fewer requirements on the technician and subject, thus researchers should consider this positioning for VL examination.

scholarly journals Association Of Knee Extensor Strength With Prevalence Of Type 2 Diabetes Among Japanese: A Cross-sectional Study

2020 ◽  
Vol 52 (7S) ◽  
pp. 157-158
Author(s):  
Takahisa Ohta ◽  
Junzo Nagashima ◽  
Takeshi Yoshihisa ◽  
Yasunori Imagawa ◽  
Nobuyoshi Ono ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Knee Extensor ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Knee Extensor Strength

Muscle-Strength and Gait-Speed Changes after Bicycle Exercise in Participants with Unilateral CVA

2001 ◽  
Vol 9 (4) ◽  
pp. 386-397 ◽  
Author(s):  
Karen L. Perell ◽  
Robert J. Gregor ◽  
A.M. Erika Scremin
Keyword(s):  
Muscle Strength ◽  
Gait Speed ◽  
Knee Extensor ◽  
Eccentric Contraction ◽  
Knee Extensors ◽  
Bicycle Exercise ◽  
Contralateral Limb ◽  
Knee Extensor Strength ◽  
Walking Tests ◽  
Knee Muscle

The purpose of this study was to determine the effect of bicycle exercise on knee-muscle strength and gait speed in 8 male participants with cerebrovascular accident (CVA). Isokinetic knee-extensor and -flexor strength were measured in both concentric- and eccentric-contraction modes. Fifty-foot walking tests were used for gait speed. After only 4 weeks of stationary recumbent cycling (12 sessions), participants improved eccentric muscle strength of the knee extensors, bilaterally. Walking-speed improvements approached but did not achieve significance with training. Improvement in concentric muscle strength of the knee extensors was observed in the involved limb, although most participants demonstrated a nonsignificant increase in muscle strength in the contralateral limb, as well. No improvements were demonstrated in the knee-flexor muscles. Thus, bicycle exercise serves to improve knee-extensor strength. In addition, these strength improvements might have implications for better control of walking in terms of bilateral improvement of eccentric muscle strength.

scholarly journals Estimating thigh skeletal muscle volume using multi-frequency segmental-bioelectrical impedance analysis

2021 ◽  
Vol 40 (1) ◽  
Author(s):  
Masashi Taniguchi ◽  
Yosuke Yamada ◽  
Masahide Yagi ◽  
Ryusuke Nakai ◽  
Hiroshige Tateuchi ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Phase Angle ◽  
Model Fitting ◽  
Muscle Thickness ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Muscle Volume ◽  
Thigh Muscle ◽  
Slice Thickness ◽  
Cross Sectional

Abstract Background The primary aim of this study was to investigate whether using the extracellular water/intracellular water (ECW/ICW) index and phase angle combined with segmental-bioimpedance analysis (BIA) improved the model fitting of skeletal muscle volume (SMV) estimation. The secondary aim was to compare the accuracy of segmental-BIA with that of ultrasound for estimating the quadriceps SMV measured with MRI. Methods Seventeen young men (mean age, 23.8 ± 3.3 years) participated in the study. The T-1 weighted images of thigh muscles were obtained using a 1.5 T magnetic resonance imaging (MRI) scanner. Thigh and quadriceps SMVs were calculated as the sum of the products of anatomical cross-sectional area and slice thickness of 6 mm across all slices. Segmental-BIA was applied to the thigh region, and data on the 50-kHz bioelectrical impedance (BI) index, ICW index, ECW/ICW index, and phase angle were obtained. The muscle thickness index was calculated as the product of the mid-thigh muscle thickness, determined using ultrasound, and thigh length. The standard error of estimate (SEE) of the regression equation was calculated to determine the model fitting of SMV estimation and converted to %SEE by dividing the SEE values by the mean SMV. Results Multiple regression analysis indicated that the combination of 50-kHz BI and the ECW/ICW index or phase angle was a significant predictor when estimating thigh SMV (SEE = 7.9 and 8.1%, respectively), but were lower than the simple linear regression (SEE = 9.4%). The ICW index alone improved the model fitting for the estimation equation (SEE = 7.6%). The model fitting of the quadriceps SMV with the 50-kHz BI or ICW index was similar to that with the skeletal muscle thickness index measured using ultrasound (SEE = 10.8, 9.6 and 9.7%, respectively). Conclusions Combining the traditionally used 50-kHz BI index with the ECW/ICW index and phase angle can improve the model fitting of estimated SMV measured with MRI. We also showed that the model suitability of SMV estimation using segmental-BIA was equivalent to that on using ultrasound. These data indicate that segmental-BIA may be a useful and cost-effective alternative to the gold standard MRI for estimating SMV.

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