scholarly journals Lower-Limb Muscle Strength, Anterior-Posterior and Inter-Limb Asymmetry in Professional, Elite Academy and Amateur Soccer Players

2021 ◽  
Vol 77 (1) ◽  
pp. 135-146
Author(s):  
Marco Beato ◽  
Damien Young ◽  
Adam Stiff ◽  
Giuseppe Coratella
Keyword(s):  
Muscle Strength ◽  
Injury Prevention ◽  
Lower Limb ◽  
Peak Torque ◽  
Soccer Players ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Cross Sectional ◽  
Strength Asymmetry ◽  
And Performance

Abstract Given the importance of the lower-limb strength and strength balance in soccer players and its relationship with injury prevention and performance, the present study compared quadriceps and hamstrings strength, the conventional (Hconc:Qconc), functional (Hecc:Qconc) hamstrings-to-quadriceps ratio and inter-limb strength asymmetry in professional, elite academy and amateur male soccer players. In this cross-sectional study, two hundred-six soccer players (professional = 75, elite academy = 68, amateurs = 63) volunteered to participate. Quadriceps and hamstrings isokinetic peak torque was investigated at 60° .s-1 in both the concentric and eccentric modality and at 300°.s-1 in the concentric modality. The conventional Hconc:Qconc, functional Hecc:Qconc ratio and quadriceps and hamstrings inter-limb strength asymmetry were then calculated. Professional players presented greater quadriceps and hamstrings strength than elite academy (effect size from small to moderate) and amateur players (moderate to very large). Both the conventional Hconc:Qconc and functional Hecc:Qconc ratio were greater in professional than elite academy and amateur players (small to moderate). Overall, quadriceps and hamstrings inter-limb strength asymmetry was greater in amateurs than professional (small to very large) and elite academy (trivial to large) players. The present findings provide coaches and medical staffs with normative lower-limb muscle strength data on professional, academy and amateur soccer players. Overall lower-limb muscle strength and inter-limb strength asymmetry could be used to evaluate possible inference on injury prevention and performance. The hamstrings-to-quadriceps ratio poorly differentiates between the soccer players background and offers limited prediction for injury prevention and performance.

scholarly journals Predictive potentials of 8 muscle strength actions, KOOS-pain, and Örebro-psychosocial difficulties on self-reported activities-of-daily-life function in patients with knee osteoarthritis: an exploratory regression-based cross-sectional study

2020 ◽  
Author(s):  
Kjartan Vårbakken ◽  
Håvard Lorås ◽  
Kjell Nilsson ◽  
Monika Engdal ◽  
Ann-Katrin Stensdotter
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Daily Life ◽  
External Rotation ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Cross Sectional ◽  
Ankle Eversion ◽  
Psychosocial Difficulties ◽  
Life Function

Abstract BackgroundThe aim of the study was to explore the relative predictive potentials of a discriminative and comprehensive set of lower-limb muscle strength factors onto self-reported physical-activities-of-daily-life-function (SR-ADL-function) in patients with knee osteoarthritis (KOA), when adjusting for prior known strong prospective predictors in a statistical model which covers the functional domains of the International Classification of Function, Disability, and Health (ICF). MethodsThe design was exploratory, patient-only, cross-sectional, and multivariable regression-based, rotating 8 strength-variables onto a hierarchical model. The setting was an Osteoarthritis-school in a secondary-care hospital in Norway. The participants were 28 Caucasian patients with mild-to-moderate symptomatic and radiographic KOA (mean age 61; 64% women) referred by general physicians to an osteoarthritis-school. Excluded patients had trauma to the lower limbs, BMI >35, and age beyond 45 to 70. The dependent/outcome variable was SR-ADL-function (Knee Injury and Osteoarthritis Outcome Score [KOOS-ADL]). The known predictors were prior documented discriminative KOOS-Pain and psychosocial difficulties (Örebro Musculoskeletal Pain Questionnaire), together with 8 candidate predictor lower-limb muscle-strength actions (Biodex and Commander II dynamometer recorded).ResultsMutually adjusted for pain and psychosocial difficulties (R2 = 0.71), the predicting muscle-strength actions explained the following unique variances in SR-ADL-function: hip external rotation 7.6% (p<0.010), ankle eversion 4.0% (p=0.050), hip internal rotation 3.8% (p=0.060), ankle inversion 3.6% (p=0.066). The remaining 4 muscle-strength actions explained from 2.0% to 1.2% (p>0.099), where knee extensor strength explained the least unique variance. Flipped, the current three best potential prediction models explained the following substantial proportions of variance in SR-ADL-function: 1) KOOS-pain, 66%; 2) KOOS-pain and Örebro psychosocial difficulties, 71%; and 3) KOOS-pain, Örebro psychosocial difficulties, and hip external rotation strength, 78%.ConclusionsAdjusted for pain and psychosocial difficulties, hip rotations and ankle eversion-inversion strength indicate substantial cross-sectional potentials for predicting SR-ADL-function for patients with KOA aged 45 to 70 in primary/hospital health-care. Relevant for future prevention and prediction/treatment studies, however, we suggest clinical researchers to consider the current muscle-strength actions together with the even stronger biopsychosocial predictors KOOS-pain and Örebro psychosocial difficulties for future ICF domain-covering models of SR-ADL. Future confirmative studies are needed to refute or generalize these pioneering exploratory conclusions.

Relationship Between Lower Limb Muscle Strength and Future Falls Among Community-Dwelling Older Adults With No History of Falls: A Prospective 1-Year Study

2020 ◽  
pp. 073346482093277 ◽  
Author(s):  
Jaqueline Mello Porto ◽  
Luciana Mendes Cangussu-Oliveira ◽  
Renato Campos Freire Júnior ◽  
Flávio Tavares Vieira ◽  
Luana Letícia Capato ◽  
...  
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Lower Limb ◽  
Peak Torque ◽  
Community Dwelling ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Monthly Basis ◽  
History Of ◽  
Community Dwelling Older Adults

Objective: To investigate whether lower limb muscle strength could be a risk factor for the first fall among nonfaller community-dwelling older adults. Method: Hip, knee, and ankle peak torque (PT) was measured with an isokinetic dynamometer in 101 older adults with no history of falls in the previous year. Next, the authors followed up the participants on a monthly basis by telephone contact to determine the occurrence of fall episodes over a period of 1 year. Multivariate logistic regression adjusted for confounding variables was applied to assess the relationship between falls and lower limb PT. Results: there was no association between lower limb PT and future falls ( p > .05). Conclusion: Based on these results, it is important to identify other factors that predispose older adults with no history of falls to falling for the first time, so that early and effective preventive strategies may be elaborated.

scholarly journals Impact of lower limb muscle strength on walking function beyond aging and diabetes

2020 ◽  
Vol 48 (6) ◽  
pp. 030006052092882
Author(s):  
Ran Wu ◽  
Yan Zhang ◽  
Jiao-Jiao Bai ◽  
Jiao Sun ◽  
Zhi-Jun Bao ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Study Data ◽  
Advanced Age ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Timed Up And Go ◽  
Cross Sectional ◽  
Patients With Diabetes

Objective This study was performed to investigate the influence of lower limb muscle strength on the walking function of advanced-age patients with diabetes. Methods In this cross-sectional descriptive study, data were collected from 202 advanced-age patients with diabetes. All patients completed questionnaires, the one-leg stance test, the timed up-and-go test, the 30-s sit-to-stand test, and plantar pressure platform measurements. The patients were divided in two groups according to their lower limb muscle strength: those with declining muscle strength and those with normal muscle strength. Results Walking function was significantly abnormal in the patients with declining lower limb muscle strength. The gait trajectories were abnormal, mainly with respect to a shortage of driving force. Conclusion The lower limb muscle strength can affect the static balance and dynamic balance in advanced-age patients with declining lower limb muscle strength.

scholarly journals Clinical Screening for Lower Limb Muscle Weakness in Community-Dwelling Older Women

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 230-230
Author(s):  
Daniela Abreu ◽  
Jaqueline Porto
Keyword(s):  
Muscle Strength ◽  
Older Women ◽  
Lower Limb ◽  
Peak Torque ◽  
Community Dwelling ◽  
Step Test ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Small Magnitude ◽  
Clinical Screening

Abstract The objective of the present study was to evaluate the ability of the five times sit to stand test (5TSST), grip strength (GS) and step test (ST) to detect older women with reduced lower-limb muscle strength (LLMS), and to investigate the clinical usefulness of the combination of such tests. One hundred and nineteen older women were submitted to the 5TSST, GS, ST and lower limb peak torque by an isokinetic dynamometer. The capacity of the clinical tests to detect older women with reduced LLMS was measured using the ROC curve, followed by calculation of posttest probability (PoTP). The results show that a ST score of 0.24 cm per cm of participant’s height shows the best PoTP for a positive test (72%). However, the combination of the ST and 5TSST enhances the accuracy from 48% (prevalence of weakness in the population) to 82.6% if both tests are positive, and decreases the PoTP from 48% to 11.4% if both tests are negative. The inclusion of GS provided additional benefits of small magnitude. In conclusion, the ST performed alone or in combination with 5TSST could be an alternative for clinical screening of LLMS reduction in older women. The early identification of impairment of lower-limb muscle strength in independent older adults may favor early intervention and prevention of negative outcomes such as falls and functional limitations.

scholarly journals Comparison of Balance and Strength of Lower Limb Muscles Between two Groups of People With Covid-19 and Healthy Ones: A Cross-Sectional Study

2021 ◽  
Vol 10 (3) ◽  
pp. 486-495
Author(s):  
Amir Ali Jafarnezhadgero ◽  
◽  
Amin Hoseinpour ◽  
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Balance Test ◽  
Cross Sectional ◽  
Significance Level ◽  
Healthy Group ◽  
Significant Difference

Background and Aims This study evaluated dynamic balance, quadriceps, and hamstring strength in individuals with Covid 19 compared with healthy control ones. Methods A total of 30 people were divided into two groups, including healthy people (n=15) and people with Covid-19. Dynamic balance was measured using the star excursion balance test. A dynamometer performed lower limb muscle strength measurements. An independent t-test was used to compare the two groups statistically. The significance level was considered 0.05. Results Quadriceps and hamstring muscle strength were similar in both groups (P>0.05). The results showed that the values of dynamic balance in the lateral (P=0.001), medial (P=0.001), and posterior medial (P=0.001) directions were significantly lower in the group with Covid-19 than that in the healthy group. Conclusion In general, the balance of people with Covid-19 was significantly lower than the healthy group. Decreased balance due to this disease can increase the risk of injury. There was no significant difference in lower limb muscle strength in patients with Covid-19 compared with healthy individuals. Perhaps more research is needed in the future to prove this better.

scholarly journals GAMBARAN KEKUATAN OTOT DAN FLEKSIBILITAS SENDI EKSTREMITAS ATAS DAN EKSTREMITAS BAWAH PADA SISWA/I SMKN 3 MANADO

2013 ◽  
Vol 4 (3) ◽  
Author(s):  
Damajanty H.C. Pangemanan ◽  
Joice N.A. Engka ◽  
Siantan Supit
Keyword(s):  
Muscle Strength ◽  
Range Of Motion ◽  
Lower Limb ◽  
Lower Limbs ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Cross Sectional ◽  
Joint Flexibility ◽  
Cross Sectional Design ◽  
The Right

Abstract: This study aimed to reveal an overview of muscle strength and joint flexibility of the upper and lower limbs of the students of SMKN 3 Manado. This was a simple descriptive study with a cross-sectional design. In this study, muscle strength of the right and left hands  was measured by using a grip strength dynamometer and of the limb muscles by using a leg dynamometer. Respondents who met the inclusion criteria were 53 people composed of 22 males and 31 females. The results showed that the upper and lower limb muscle strength were lower than normal, and none were categorized as good muscle strength. Flexibility of lower limb joints generally had a normal range of motion (ROM) value. Conclusion: Most students of SMKN 3 Manado had very low upper and lower limb muscle strength. The evaluation of lower limb joint flexibility showed normal ROM value. Keywords: muscle strength,joints flexibility.     Abstrak: Penelitian ini bertujuan untuk mengetahui gambaran kekuatan otot dan fleksibilitas sendi ekstremitas atas dan bawah pada pelajar SMKN 3 Manado. Penelitian menggunakan model survey deskriptif potong lintang dengan mengukur kekuatan otot ektremitas kiri dan kanan menggunakan alat pengukur khusus pada tangan dan kaki. Responden yang memenuhi kriteria inklusi terdiri dari 53 orang yang terbagi 22 orang pria dan 31 orang perempuan. Hasil penelitian menunjukkan bahwa kekuatan otot ekstremitas atas (kekuatan otot genggam tangan kanan dan kiri) dan kekuatan otot ekstremitas bawah (kekuatan otot tungkai) umumnya mempunyai kekuatan otot yang kurang sekali dan tidak ada yang masuk kategori baik Fleksibilitas sendi ekstremitas bawah umumnya mempunyai nilai range of motion (ROM) normal. Simpulan: Sebagian besar siswa/i SMKN 3 Manado mempunyai kekuatan otot ekstremitas atas dan bawah tergolong kategori kurang sekali. Penilaian fleksibilitas sendi-sendi ekstremitas bawah umumnya memperlihatkan ROM yang normal. Kata kunci: kekuatan otot, fleksibilitas sendi.

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