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Rectus femoris

Adriana Neves Dos Santos, Nelci Adriana Cicuto Ferreira Rocha
BACKGROUND: Kinesiotaping (KT) has been commonly used in clinical setting. However, beneficial KT effects have not been proved yet. OBJECTIVE: We aimed to verify the effects of KT in knee extensor torque in children with CP. METHODS: We evaluated three children diagnosed as spastic CP, classified as level I, II and III, according with GMFCS. Knee extensor peak torque was analyzed by isokinetic evaluation (Biodex Multi Joint System). The test was performed at 60°/s in the concentric passive mode and the children performed maximal contractions...
November 8, 2018: NeuroRehabilitation
Rocco Cavaleri, Tribikram Thapa, Paula R Beckenkamp, Lucy S Chipchase
Background: There exists conflicting evidence regarding the impact of kinesiology tape on performance and muscle function. One variable that may account for disparities in the findings of previous studies is the colour of the tape applied. Colour is hypothesised to influence sporting performance through modulation of arousal and aggression. However, few studies have investigated the influence of colour on products designed specifically to enhance athletic performance. Further, no studies have investigated the potential influence of colour on other drivers of performance, such as corticomotor activity and neuromuscular function...
2018: BMC Sports Science, Medicine and Rehabilitation
Abir Massaad, Ayman Assi, Ziad Bakouny, Aren Joe Bizdikian, Wafa Skalli, Ismat Ghanem
Lower limb (LL) muscle morphology and growth are altered in children with cerebral palsy (CP). Muscle alterations differ with age and with severity of motor impairment, classified according to the gross motor classification system (GMFCS). Muscle alterations differ also with orthopedic intervention, frequently performed at the level of the shank muscles since an early age, such as the gastrocnemius. The aim was to investigate the alterations of treatment-naïve pelvis and thigh muscle lengths and volumes in children with GMFCS levels I and II, of varying ages...
October 27, 2018: Journal of Biomechanics
Danielle Cristine Carvalho Muniz E Silva, Dângelo José de Andrade Alexandre, Júlio Guilherme Silva
OBJECTIVES: The role of a myofascial release (MFR) on flexion contractures after total knee arthroplasty (TKA) has not yet been elucidated. Therefore, the purpose of this study was to determine its immediate effect on such patients. METHODS: In this A-B single subject experimental study, 33 TKA's patients with knee flexion contracture had their gluteal, posterior fascia lata, posterior crural and plantar fasciae released. Patients' knee range of motion (KROM), pain and muscle electric activity were assessed pre- and post-intervention...
October 2018: Journal of Bodywork and Movement Therapies
Gabriel Oliver, Federico Portabella, Jose A Hernandez
BACKGROUND: Injury to the anterior cruciate ligament (ACL) not only causes mechanical instability but also produces proprioceptive deficit with an altered neuromuscular response. After ACL reconstruction, patients in general continue to complain of a feeling of knee instability. The objective of our study was to assess patient proprioception and its evolution over time by measuring the muscle latency time during a dynamic activity. METHODS: Twenty-five patients with an ACL tear following sports injuries were included in a prospective, comparative, matched controlled study...
October 26, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Carolina G Fritsch, Maurício P Dornelles, Juliana L Teodoro, Larissa X N da Silva, Marco A Vaz, Ronei S Pinto, Eduardo L Cadore, Bruno M Baroni
PURPOSE: The purpose of this study was to investigate the effects of photobiomodulation therapy (PBMT) combined with resistance training on knee extensors muscle mass, strength and functional capacity in elderly men. METHODS: In this randomized double-blinded placebo-controlled trial, healthy elderly men (age 60-80 years) completed 12 weeks of resistance training (2×/week) with application of placebo (n = 13) or active PBMT (n = 11) on quadriceps muscles (850 nm, 240 J per limb) before each training session...
October 26, 2018: European Journal of Applied Physiology
Makoto Kawai, Keigo Taniguchi, Tomoyuki Suzuki, Masaki Katayose
Objectives: Orthopaedic surgery of the knee joint results in functional deterioration of the quadriceps femoris muscle. However, little is known about quadriceps femoris muscle dysfunction in the early postsurgical period. Therefore, we examined the stiffness of the quadriceps femoris muscle in the early postsurgical period. Methods: Seven patients and seven healthy controls performed quadriceps contraction exercises. In resting and contraction conditions, the shear modulus, muscle thickness and pennation angle were measured for the vastus medialis (VM), vastus lateralis (VL) and the rectus femoris (RF) using ultrasound elastography...
2018: BMJ Open Sport & Exercise Medicine
Juraj Saric, Domagoj Lisica, Ivan Orlic, Jozo Grgic, James W Krieger, Sasa Vuk, Brad J Schoenfeld
Saric, J, Lisica, D, Orlic, I, Grgic, J, Krieger, JW, Vuk, S, and Schoenfeld, BJ. Resistance training frequencies of 3 and 6 times per week produce similar muscular adaptations in resistance-trained men. J Strength Cond Res XX(X): 000-000, 2018-We examined the effects of resistance training (RT) frequency performed 3 times per week (RT3) vs. RT performed 6 times per week (RT6) under volume-equated conditions in resistance-trained men. Twenty-seven men were randomly allocated to RT3 (n = 14) or RT6 (n = 13)...
October 22, 2018: Journal of Strength and Conditioning Research
Jingfei Xu, Siu Ngor Fu, Dong Zhou, Chen Huang, François Hug
This study aimed to determine whether pre-exercise muscle stiffness is related to the amount of muscle damage induced by an eccentric exercise and to determine whether the post-exercise increase in stiffness is homogenously distributed between the synergist muscles. Fifty healthy participants were randomly assigned to an eccentric exercise group or a control group. The shear modulus (an index of stiffness) of rectus femoris (RF), vastus lateralis (VL) and vastus medialis oblique (VMO) was measured before, immediately after and at 48 h after eccentric exercise...
October 26, 2018: European Journal of Sport Science
Jingfei Xu, François Hug, Siu Ngor Fu
Background: Until recently it has not been possible to isolate the mechanical behavior of individual muscles during passive stretching. Muscle shear modulus (an index of muscle stiffness) measured using ultrasound shear wave elastography can be used to estimate changes in stiffness of an individual muscle. The aims of the present study were (1) to determine the shear modulus-knee angle relationship and the slack angle of the vastus medialis oblique (VMO), rectus femoris (RF), and vastus lateralis (VL) muscles; (2) to determine whether this differs between the muscles...
April 2018: Journal of Sport and Health Science
Ken Nishihara, Hisashi Kawai, Takeshi Kera, Hirohiko Hirano, Yutaka Watanabe, Yoshinori Fujiwara, Kazushige Ihara, Hunkyung Kim, Masashi Tanaka, Shuichi Obuchi
Purpose: The purpose of this study was to clarify the reference values of muscle thicknesses by age and to elucidate the association of muscle thickness with physical function in a large group of community-dwelling elderly individuals. Participants and methods: The muscle thicknesses of the rectus femoris (RF), vastus intermedius (VI), and quadriceps femoris (QF) in 777 of 831 enrolled elderly individuals were measured by ultrasonography, and physical function was measured using knee extension strength (KES), one-legged stance, walking, Timed Up and Go, and grip strength tests...
2018: Clinical Interventions in Aging
Young-Lan Son, Jae-Woon Kim
[Purpose] This study aimed to investigate the effects of mirror neuron system-based self-observation training on lower limb muscle activity and dynamic balance in patients with chronic stroke. [Participants and Methods] Twenty patients with chronic stroke were randomly assigned to a self-observation training group (n=10) or a control group (n=10). Both groups followed a routine 30-minute exercise therapy regimen five days a week for four weeks. The self-observation training group additionally watched video clips of their balance and functional gait training and performed physical training twice over a 10-minute time span...
October 2018: Journal of Physical Therapy Science
Camilla Rodrigues de Souza Silva, André Dos Santos Costa, Taciano Rocha, Diogo Arruda Martins de Lima, Tamires do Nascimento, Sílvia Regina Arruda de Moraes
Muscle architecture parameters performed using ultrasound serve as an aid to monitor muscle changes derived from diseases, however there are no studies that determine the reliability and applicability of this evaluation in individuals with type 2 diabetes (DM2). Three raters captured three images of measurements of thickness of the rectus femoris (RF), vastus intermedius and anterior quadriceps, RF muscle cross-sectional area, RF pennation angle in 17 individuals with DM2 above 50 and sedentary. Intra and inter-raters analysis showed reliability from high to very high for the three raters (ICC> 0...
2018: PloS One
César L Collazo García, Javier Rueda, Bruno Suárez Luginick, Enrique Navarro
Collazo García, CL, Rueda, J, Suárez Luginick, B, Navarro, E. Differences in the electromyographic activity of lower-body muscles in hip thrust variations. J Strength Cond Res XX(X): 000-000, 2018-Coaches often use variations of an exercise to train a specific muscle. The purpose of this study was to analyze motor patterns in 4 variations of one of the most popular strength training exercises for the lower body: the barbell hip thrust. Seven experienced personal trainers performed a series of 8 repetitions of each variation with a load of 40% one repetition maximum...
October 17, 2018: Journal of Strength and Conditioning Research
Megan A Bryanton, Martin Bilodeau
PURPOSE: The purpose of this investigation was to evaluate alterations in muscular effort and temporal characteristics of their activity during the sit-to-stand (STS) due to isolated fatiguing of the knee extensors, as indicated by declines in torque output. METHODS: Surface electromyography of the lower extremity was recorded in healthy young (n = 11) and older (n = 11) adults as they ascended from a seated position, before and after dynamic knee extension exercise...
October 13, 2018: European Journal of Applied Physiology
Michael O Harris-Love, Nilo A Avila, Bernadette Adams, June Zhou, Bryant Seamon, Catheeja Ismail, Syed H Zaidi, Courtney A Kassner, Frank Liu, Marc R Blackman
Estimates of muscle tissue composition may have greater prognostic value than lean body mass levels regarding health-related outcomes. Ultrasound provides a relatively low cost, safe, and accessible mode of imaging to assess muscle morphology. The purpose of this study was to determine the construct validity of muscle echogenicity as a surrogate measure of muscle quality in a sample of older, predominantly African American (AA) participants. We examined the association of rectus femoris echogenicity with mid-thigh computed tomography (CT) scan estimates of intra- and intermuscular adipose tissue (IMAT), basic metabolic parameters via blood sample analysis, muscle strength, and mobility status...
October 10, 2018: Journal of Clinical Medicine
Mostafa Yaghoubi, Philip W Fink, Wyatt H Page, Sarah P Shultz
PURPOSE: This study examined differences in lower extremity kinematics and muscle activation patterns between normal weight (NW) and overweight (OW) children during stationary exercises (running in place, frontal kick, and butt kick) at submaximal intensity. METHODS: Healthy children (aged 10-13 y) were stratified into OW (n = 10; body fat percentage: 34.97 [8.60]) and NW (n = 15; body fat percentage: 18.33 [4.87]). Electromyography was recorded for rectus femoris, vastus lateralis, biceps femoris, gastrocnemius, and tibialis anterior...
October 10, 2018: Pediatric Exercise Science
Hisakuni Obayashi, Naoko Kobayashi, Yoshikazu Nezu, Takashi Yamoto, Mitsuyuki Shirai, Fumitoshi Asai
Previously, we have demonstrated the potential of plasma 2-hydroxyglutarate (2HG) as an easily detectable biomarker for skeletal muscle injury in rats. Here, we examined whether plasma 2HG was superior to conventional skeletal muscle damage biomarkers, including aspartate aminotransferase (AST), creatine kinase (CK), and skeletal muscle-type CK isoenzyme (CK-MM) levels, in rats. Skeletal muscle injury was induced in 4- or 9-week-old male Fischer 344 rats by cerivastatin (CER) or tetramethyl-p-phenylenediamine (TMPD) administration...
2018: Journal of Toxicological Sciences
Martin Fruth, Bjoern Buehring, Xenofon Baraliakos, Juergen Braun
OBJECTIVES: To identify inflammatory pelvic structures of patients with polymyalgia rheumatica (PMR) by magnetic resonance imaging (MRI) in detail, searching for a disease-specific pattern. METHODS: A total of 40 contrast-enhanced pelvic MRIs of patients with a clinical diagnosis of PMR was reviewed by an experienced musculoskeletal radiologist who assessed all abnormalities semi-quantitatively, based on a predefined scoring system. RESULTS: The median (25th/75th percentiles) age of patients was 67 (55/73) years, median symptom duration 13 (6/22) weeks, 55% female, median CRP 1...
September 2018: Clinical and Experimental Rheumatology
Cíntia E Botton, Daniel Umpierre, Anderson Rech, Lucinéia O Pfeifer, Carlos L F Machado, Juliana L Teodoro, Alexandre S Dias, Ronei S Pinto
This study is a randomized controlled clinical trial that verified the resistance training efficacy on neuromuscular parameters, with muscle quality as primary outcome. Forty-four elderly with diabetes type 2 (69.7 ± 6.9 years; 26 men) were randomly allocated to a 12-weeks resistance training group (RTG, 3 times a week), or an active control group with stretching classes (CG, once a week). Primary and secondary outcomes were assessed at baseline and after 12 weeks, as follow: quadriceps muscle thickness and rectus femoris muscle quality, maximal knee extension strength, rapid strength, functional performance, visceral adipose tissue, glycemic control, lipid profile and quality of life...
October 5, 2018: Experimental Gerontology
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