scholarly journals Rate of force development in the quadriceps of individuals with severe knee osteoarthritis: A preliminary cross-sectional study

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0262508
Author(s):  
Yusuke Suzuki ◽  
Hirotaka Iijima ◽  
Masatoshi Nakamura ◽  
Tomoki Aoyama
Keyword(s):  
Knee Osteoarthritis ◽  
Cross Sectional Study ◽  
Quadriceps Strength ◽  
The Body ◽  
Rate Of Force Development ◽  
Analysis Of Covariance ◽  
Sectional Study ◽  
Cross Sectional ◽  
Maximum Voluntary Isometric Contraction ◽  
Force Development

Knee osteoarthritis (KOA) is a leading cause of knee pain and disability due to irreversible cartilage degeneration. Previous studies have not identified modifiable risk factors for KOA. In this preliminary cross-sectional study, we aimed to test the following hypotheses: individuals with severe KOA would have a significantly lower quadriceps rate of force development (RFD) than individuals with early KOA, and the decrease in quadriceps RFD would be greater than the decrease in maximum quadriceps strength in individuals with severe KOA. The maximum isometric strength of the quadriceps was assessed in individuals with mild (Kellgren and Lawrence [K&L] grade 1–2) and severe KOA (K&L grade 3–4) using a handheld dynamometer. The RFD was analyzed at 200 ms from torque onset and normalized to the body mass and maximum voluntary isometric contraction torque. To test whether the quadriceps RFD was lowered and whether the lower in the quadriceps RFD was greater than the lower in maximum quadriceps strength in individuals with severe knee OA, the Mann–Whitney U-test and analysis of covariance were performed, respectively. The effect size (ES) based on Hedges’ g with a 95% confidence interval (CI) was calculated for the quadriceps RFD and maximum quadriceps strength. Sixty-six participants were analyzed. Individuals with severe KOA displayed significantly lower quadriceps RFD (p = 0.009), the lower being greater than the lower in maximum quadriceps strength (between-group difference, ES: 0.88, -1.07 vs. 0.06, -0.22). Our results suggest that a decreased quadriceps RFD is a modifiable risk factor for progressive KOA. Our finding could help in the early detection and prevention of severe KOA.

scholarly journals Rate of Force Development in the Quadriceps of Individuals With Severe Knee Osteoarthritis: A Cross-Sectional Study

2021 ◽  
Author(s):  
Yusuke Suzuki ◽  
Hirotaka Iijima ◽  
Masatoshi Nakamura ◽  
Tomoki Aoyama
Keyword(s):  
Knee Osteoarthritis ◽  
Cross Sectional Study ◽  
Quadriceps Strength ◽  
Rate Of Force Development ◽  
Analysis Of Covariance ◽  
Cross Sectional ◽  
Maximum Voluntary Isometric Contraction ◽  
Force Development ◽  
The Difference ◽  
Grade 3

Abstract We tested the following hypotheses: individuals with severe knee osteoarthritis (KOA) would display a significantly decreased quadriceps rate of force development (RFD); and this decrease would be greater than the decrease in maximum quadriceps strength. Maximum isometric strength of the quadriceps was assessed in individuals with mild (Kellgren and Lawrence [K&L] grade 1–2) and severe KOA (K&L grade 3–4). RFD was analyzed at 200 ms from torque onset and normalized to body mass and maximum voluntary isometric contraction torque. The decrease in quadriceps RFD and the difference between this and the decrease in maximum quadriceps strength was tested with logistic regression analysis with a propensity-score-adjusted model and analysis of covariance, respectively. Effect size by Hedges’ g with a 95% confidence interval (CI) was calculated for the quadriceps RFD and maximum quadriceps strength. Sixty-six participants were analyzed. Individuals with severe KOA displayed significantly decreased quadriceps RFD (odds ratio: 0.50; 95% CI: 0.26-0.82), the decrease being greater than that in maximum quadriceps strength (between-group difference, ES: 0.88, -1.07 vs. 0.06, -0.22). The results suggest that a decreased quadriceps RFD is a modifiable risk factor for progressive KOA. This could lead to the early detection and prevention of severe KOA.

scholarly journals Relative difference in muscle strength between patients with knee osteoarthritis and healthy controls when tested bilaterally and joint-inclusive: an exploratory cross-sectional study

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
K. Vårbakken ◽  
H. Lorås ◽  
K. G. Nilsson ◽  
M. Engdal ◽  
A. K. Stensdotter
Keyword(s):  
Muscle Strength ◽  
Knee Osteoarthritis ◽  
Cross Sectional Study ◽  
Analysis Of Covariance ◽  
Control Group ◽  
Sectional Study ◽  
Kinetic Chain ◽  
Cross Sectional ◽  
Significant Difference ◽  
Ankle Joints

Abstract Background To improve the goal-directedness of strength exercises for patients with knee osteoarthritis (KOA), physical rehabilitation specialists need to know which muscle-groups are most substantially weakened across the kinetic chain of both lower extremities. The purpose was to improve the knowledge base for strength exercise therapy. The objective was to explore the relative differences in muscle strength in the main directions bilaterally across the hip, knee, and ankle joints between patients with light-to-moderate symptomatic and radiographic KOA and people without knee complaints. Methods The design was an exploratory, patient vs. healthy control, and cross-sectional study in primary/secondary care. Twenty-eight patients with mild to moderate KOA (18 females, mean age 61) and 31 matched healthy participants (16 females, mean age 55), participated. Peak strength was tested concentrically or isometrically in all main directions for the hip, knee, and ankle joints bilaterally, and compared between groups. Strength was measured by a Biodex Dynamometer or a Commander II Muscle Tester (Hand-Held Dynamometer). Effect sizes (ES) as Cohen’s d were applied to scale and rank the difference in strength measures between the groups. Adjustment for age was performed by analysis of covariance. Results The most substantial muscle weaknesses were found for ankle eversion and hip external and internal rotation in the involved leg in the KOA-group compared to the control-group (ES [95% CI] −0.73 [−1.26,-0.20], − 0.74 [−1.26,-0.21], −0.71 [−1.24,-0.19], respectively; p < 0.01). Additionally, smaller but still significant moderate muscle weaknesses were indicated in four joint–strength directions: the involved leg’s ankle inversion, ankle plantar flexion, and knee extension, as well as the uninvolved leg’s ankle dorsal flexion (p < 0.05). There was no significant difference for 17 of 24 tests. Conclusions For patients with KOA between 45 and 70 years old, these explorative findings indicate the most substantial weaknesses of the involved leg to be in ankle and hip muscles with main actions in the frontal and transverse plane in the kinetic chain of importance during gait. Slightly less substantial, they also indicate important weakness of the knee extensor muscles. Confirmatory studies are needed to further validate these exploratory findings.

scholarly journals Association between Short Hours of Sleep and Overweight/Obesity in Mexican Adolescent Population: A School-Based Cross-Sectional Study

Healthcare ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 939
Author(s):  
Ana Fresan ◽  
Alma Delia Genis-Mendoza ◽  
María Lilia López-Narváez ◽  
Tania Guadalupe Gómez-Peralta ◽  
Daniela Georgina Aguilar-Velázquez ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
The Body ◽  
Categorical Variables ◽  
Continuous Variables ◽  
Sectional Study ◽  
Cross Sectional ◽  
Obese Adolescent ◽  
School Based ◽  
Prevalence Of Obesity ◽  
Mexican Adolescents

Background/Aim: Obesity in adolescents is increasing; as such, the aim of this study was to determine the prevalence of obesity in Mexican adolescents and examine its possible association with hours of sleep. Methods: A school-based cross-sectional study was carried out. This study included 863 adolescents aged between 11 and 16 years. The prevalence of obesity was estimated using the body mass index (BMI). The duration of sleep (and other information) was assessed by a self-reported questionnaire. The Cochran–Mantel–Hansel test for categorical variables and a general linear model for continuous variables were used to evaluate the interaction effect of BMI and sex with respect to sleeping and assessed activity conditions. Results: It was found that 47.6% of the adolescents were overweight/obese. Men were more frequently overweight/obese than women (52.6% vs. 41.8%, p = 0.002). Moreover, overweight/obese adolescents were younger and spent fewer daily hours watching television (p < 0.05). Men practiced sports more hours per week than women (p = 0.04). However, women spent more daily time on the internet (p = 0.05), and overweight/obese adolescent women slept fewer hours than overweight/obese men and adolescents with normal weight (p = 0.008). Conclusions: The development of strategies for the prevention of overweight/obesity and the improvement of sleep duration should include a gender perspective to improve health habits in Mexican adolescents.

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