keyword
https://read.qxmd.com/read/38530855/synergistic-difference-in-the-effect-of-stretching-on-electromechanical-delay-components
#1
JOURNAL ARTICLE
Nicholas Toninelli, Giuseppe Coratella, Stefano Longo, Giulia M Romani, Christian Doria, Susanna Rampichini, Eloisa Limonta, Fabio Esposito, Emiliano Cè
This study investigated the synergistic difference in the effect of stretching on electromechanical delay (EMD) and its components, using a simultaneous recording of electromyographic, mechanomyographic, and force signals. Twenty-six healthy men underwent plantar flexors passive stretching. Before and after stretching, the electrochemical and mechanical components of the EMD and the relaxation EMD (R-EMD) were calculated in gastrocnemius medialis (GM), lateralis (GL) and soleus (SOL) during a supramaximal motor point stimulation...
2024: PloS One
https://read.qxmd.com/read/38524826/is-muscle-stiffness-a-determinant-for-range-of-motion-in-the-leg-muscles
#2
JOURNAL ARTICLE
Marina M Reiner, Markus Tilp, Masatoshi Nakamura, Andreas Konrad
Previous training studies with comprehensive stretching durations have reported that an increase in range of motion (ROM) can be related to decreases in muscle stiffness. Therefore, the purpose of this study was to analyze the association between the passive muscle stiffness of three muscle groups (triceps surae, quadriceps, hamstrings) to the respective joint ROM. Thirty-six healthy male soccer players volunteered in this study. After a standardized warm-up, the muscle stiffness was tested via shear wave elastography in six muscles (gastrocnemius medialis and lateralis, rectus femoris, semitendinosus, semimembranosus, and biceps femoris long head)...
March 2024: Biology of Sport
https://read.qxmd.com/read/38507359/the-influence-of-obesity-and-fat-distribution-on-ankle-muscle-coactivation-during-gait
#3
JOURNAL ARTICLE
Wael Maktouf, Hamza Ferhi, Sébastien Boyas, Bruno Beaune, Sabri Gaied Chortane, Pierre Portero, Sylvain Durand
BACKGROUND: Excessive body weight is associated with gait alterations. In none of previous studies, body fat distribution has been considered as a factor that could change gait parameters and induce different neuromuscular adaptations. OBJECTIVE: This multicenter, analytical, and cross-sectional study aimed to investigate the influence of the body mass distribution on gait parameters and ankle muscle coactivation in obese individuals. METHODS: Three distinct groups were included in the study: a non-obese control group (CG, n = 15, average age = 32...
2024: PloS One
https://read.qxmd.com/read/38493577/mild-untreated-hypercholesterolaemia-affects-mechanical-properties-of-the-achilles-tendon-but-not-gastrocnemius-muscle
#4
JOURNAL ARTICLE
Brooke K Coombes, Monica Hanna, Kaelah A Thompson, Michel W Coppieters, Taylor J M Dick, Ricardo J Andrade, Lee Barber
Tendon xanthoma and altered mechanical properties have been demonstrated in people with familial hypercholesterolaemia. However, it is unclear whether mild, untreated hypercholesterolaemia alters musculotendinous mechanical properties and muscle architecture. We conducted a case-control study of adults aged 50 years and over, without lower limb injury or history of statin medication. Based on fasting low-density lipoprotein (LDL) cholesterol levels, 6 participants had borderline high LDL (>3.33 mmol/L) and 6 had optimal LDL cholesterol (<2...
March 14, 2024: Journal of Biomechanics
https://read.qxmd.com/read/38461743/gastrocnemius-medialis-and-achilles-tendon-properties-do-not-differ-between-children-with-unilateral-or-bilateral-spastic-cerebral-palsy
#5
JOURNAL ARTICLE
Andreas Habersack, Martin Svehlik, Bernhard Guggenberger, Markus Tilp, Annika Kruse
Spastic cerebral palsy (SCP) is a common neurodevelopmental disorder in children, which can be categorized into unilateral and bilateral subtypes. Most studies examining the muscle-tendon properties of the lower extremities in individuals with SCP do not distinguish between subtypes. However, spastic muscle morphology is an important determinant for its function. Therefore, differences in muscle-tendon pathology might lead to different treatment strategies. The aim of this retrospective study was to investigate the muscle-tendon properties between children with unilateral SCP and those with bilateral SCP...
March 7, 2024: Journal of Biomechanics
https://read.qxmd.com/read/38458184/plantar-flexor-muscle-activity-and-fascicle-behavior-in-gastrocnemius-medialis-during-running-in-highly-cushioned-shoes-with-carbon-fiber-plates
#6
JOURNAL ARTICLE
Keiichiro Hata, Yuta Hamamura, Hiroaki Noro, Yohei Yamazaki, Shunsuke Nagato, Kazuyuki Kanosue, Toshio Yanagiya
The purposes of this study were to clarify the electromyography (EMG) of plantar flexors and to analyze the fascicle and tendon behaviors of the gastrocnemius medialis (GM) during running in the carbon-fiber plate embedded in thicker midsole racing shoes, such as the Nike ZoomX Vaporfly (VF) and traditional racing shoes (TRAD). We compared the fascicle and series elastic element behavior of the GM and EMG of the lower limb muscles during running (14 km/h, 45 s) in athletes wearing VF or TRAD. GM EMGs in the push-off phase were approximately 50% lower in athletes wearing VF than in TRAD...
March 7, 2024: Journal of Applied Biomechanics
https://read.qxmd.com/read/38451696/cross-education-effects-of-isokinetic-eccentric-plantarflexor-training-on-flexibility-strength-and-muscle-tendon-mechanics
#7
JOURNAL ARTICLE
Anthony D Kay, Anthony J Blazevich, Jessica C Tysoe, Brett A Baxter
INTRODUCTION: Large increases in joint range of motion (ROM) have been reported after eccentric resistance training, however limited data exist describing the associated mechanisms or potential cross-education effects in the contralateral limb. Therefore, the effects of a 6-week isokinetic eccentric plantarflexor training program were examined in 26 participants. METHODS: Before and after the training program, dorsiflexion ROM, plantarflexor strength, and muscle-tendon unit (MTU) morphology and mechanics were measured in control (n = 13) and experimental (n = 13) young adult groups...
March 5, 2024: Medicine and Science in Sports and Exercise
https://read.qxmd.com/read/38406242/dataset-of-inter-and-intramuscular-variability-of-stiffness-in-paretic-individuals-during-prone-and-standing-positions
#8
JOURNAL ARTICLE
Kalthoum Belghith, Mustapha Zidi, Jean Michel Fedele, Rayan Bou-Serhal, Wael Maktouf
Several studies have investigated muscle rigidity using SWE. However, the assessments may not consider the most affected regions within the same muscle tissue nor the intramuscular variability of rigidity between muscles of the same muscle group, e.g., plantar flexors. The data presented in this article aimed to explore the inter-and intramuscular variability of plantar flexors stiffness during prone and standing positions at different muscle lengths in healthy and paretic individuals. Shear wave ultrasound images were acquired for the three plantar flexor muscles (gastrocnemius medialis [GM], gastrocnemius lateralis [GL], and soleus [SOL]) in two positions: prone and standing...
April 2024: Data in Brief
https://read.qxmd.com/read/38394765/influence-of-muscle-length-on-the-three-dimensional-architecture-and-aponeurosis-dimensions-of-rabbit-calf-muscles
#9
JOURNAL ARTICLE
Mischa Borsdorf, Stefan Papenkort, Markus Böl, Tobias Siebert
The function of a muscle is highly dependent on its architecture, which is characterized by the length, pennation, and curvature of the fascicles, and the geometry of the aponeuroses. During in vivo function, muscles regularly undergo changes in length, thereby altering their architecture. During passive muscle lengthening, fascicle length (FL) generally increases and the angle of fascicle pennation (FP) and the fascicle curvature (FC) decrease, while the aponeuroses increase in length but decrease in width...
February 7, 2024: Journal of the Mechanical Behavior of Biomedical Materials
https://read.qxmd.com/read/38394127/sedentary-behaviour-especially-accumulation-pattern-has-an-independent-negative-impact-on-skeletal-muscle-size-and-architecture-in-community-dwelling-older-adults
#10
JOURNAL ARTICLE
Jorgen A Wullems, Hans Degens, Sabine M P Verschueren, Christopher I Morse, Dale M Grant, Gladys L Onambélé-Pearson
Prolonged sedentary behaviour (SB) i.e. longer bouts, is suggested to have a range of negative health effects, independent of habitual light and medium-to-vigorous physical activity (LIPA or MVPA). Any effect on musculoskeletal size, architecture or morphology has seldom been reported in older adults. Moreover, no study has yet determined if any association would persist following adjustment for covariates. Therefore, the aim of the present study was to investigate the associations between SB, and properties of the Gastrocnemius Medialis (GM) muscle, in a cross-sectional sample of older adults using compositional data analysis...
2024: PloS One
https://read.qxmd.com/read/38393268/a-comparison-of-leg-muscle-oxygenation-cardiorespiratory-responses-and-blood-lactate-between-walking-and-running-at-the-same-speed
#11
JOURNAL ARTICLE
Alexandros Stathopoulos, Anatoli Petridou, Nikolaos Kantouris, Vassilis Mougios
It is not known whether different gait modes, or movement patterns, at the same speed elicit differences in muscle oxygen oxygenation, expressed as muscle oxygen saturation (SmO2 ). Thus, the aim of this study was to compare the oxygenation of two leg muscles (vastus lateralis and gastrocnemius medialis), as well as the heart rate, respiratory gases, and blood lactate between two gait modes (walking and running) of the same speed and duration. Ten men walked and ran for 30 min each at 7 km/h in a random, counterbalanced order...
February 1, 2024: Sports
https://read.qxmd.com/read/38390231/the-acute-effects-of-a-stretching-and-conditioning-exercise-protocol-for-the-lower-limbs-on-gait-performance-a-proof-of-concept-and-single-blind-study
#12
JOURNAL ARTICLE
Felipe B Santinelli, Aline Prieto Silveira-Ciola, Vinicius C Moreno, Marina H Kuroda, Fabio A Barbieri
BACKGROUND: Due to improvement in movement performance, post-activation performance enhancement (PAPE) may open new possibilities to improve gait performance. However, no study has attempted to translate this phenomenon into walking. Therefore, the study aimed to test whether acute stretching followed by a conditioning exercise can improve subsequent gait performance in healthy adults. RESEARCH QUESTION: Can an exercise protocol subsequently improve gait performance? METHODS: Sixteen individuals walked four 10-m trials (in each period) before and after 7 min of an exercise protocol composed of stretching (focusing on the lower limb) and a conditioning exercise (standing calf-raise wearing a vest of 20 kg)...
2024: Frontiers in sports and active living
https://read.qxmd.com/read/38386649/persisting-effects-of-jaw-clenching-on-dynamic-steady-state-balance
#13
JOURNAL ARTICLE
Cagla Fadillioglu, Lisa Kanus, Felix Möhler, Steffen Ringhof, Marc Schmitter, Daniel Hellmann, Thorsten Stein
The effects of jaw clenching on balance has been shown under static steady-state conditions but the effects on dynamic steady-state balance have not yet been investigated. On this basis, the research questions were: 1) if jaw clenching improves dynamic steady-state balance; 2) if the effects persist when the jaw clenching task loses its novelty and the increased attention associated with it; 3) if the improved dynamic steady-state balance performance is associated with decreased muscle activity. A total of 48 physically active healthy adults were assigned to three groups differing in intervention (Jaw clenching and balance training (JBT), only balance training (OBT) or the no-training control group (CON)) and attending two measurement points separated by two weeks...
2024: PloS One
https://read.qxmd.com/read/38381630/isometric-plantarflexion-moment-prediction-based-on-a-compartment-specific-hd-semg-driven-musculoskeletal-model
#14
JOURNAL ARTICLE
Manxu Zheng, Pengcheng Lu, Wen Wu, Rong Song
OBJECTIVE: electromyogram (EMG)-driven musculoskeletal models have been widely used to investigate human movements while existing EMG-driven models commonly neglect regional heterogeneity in anatomy and activation within a skeletal muscle. To consider neuromuscular compartment anatomy and activation, a subject- and compartment-specific EMG-driven model was developed for isometric plantarflexion moment prediction. METHODS: the model was hill-type consisting of gastrocnemius medialis, gastrocnemius lateralis, and soleus around the ankle joint, and each muscle was discretised into four compartments...
February 21, 2024: IEEE Transactions on Bio-medical Engineering
https://read.qxmd.com/read/38378402/quantifying-plantar-flexor-muscles-stiffness-during-passive-and-active-force-generation-using-shear-wave-elastography-in-individuals-with-chronic-stroke
#15
JOURNAL ARTICLE
Kalthoum Belghith, Mustapha Zidi, Jean Michel Fedele, Rayan Bou-Serhal, Wael Maktouf
OBJECTIVES: This study aims to investigate the mechanical properties of paretic and healthy plantar flexor muscles and assesses the spatial distribution of stiffness between the gastrocnemius medialis (GM) and lateralis (GL) during active force generation. METHODS: Shear wave elastography measurements were conducted on a control group (CNT, n=14; age=59.9±10.6 years; BMI=24.5±2.5 kg/m2 ) and a stroke survivor group (SSG, n=14; age=63.2±9.6 years; BMI=23...
February 19, 2024: Ultrasound in Medicine & Biology
https://read.qxmd.com/read/38353060/tendon-elongation-and-function-after-delayed-or-standard-loading-of-surgically-repaired-achilles-tendon-ruptures-a-randomized-controlled-trial
#16
JOURNAL ARTICLE
Rikke Hoeffner, Anne-Sofie Agergaard, Rene B Svensson, Camilla Cullum, Rasmus Kramer Mikkelsen, Lars Konradsen, Michael Krogsgaard, Mikael Boesen, Michael Kjaer, S Peter Magnusson
BACKGROUND: Achilles tendon ruptures often result in long-term functional deficits despite accelerated (standard) rehabilitation. PURPOSE/HYPOTHESIS: The purpose of this study was to investigate if delayed loading would influence functional, clinical, and structural outcomes of the muscles and tendon 1 year after a surgical repair. It was hypothesized that delaying the loading would reduce the heel-rise height deficit 1 year after Achilles tendon rupture. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1...
February 14, 2024: American Journal of Sports Medicine
https://read.qxmd.com/read/38340711/relationship-between-knee-frontal-plane-projection-angle-and-lower-limb-muscle-activity-in-female-athletes
#17
JOURNAL ARTICLE
Luis Llurda-Almuzara, Max Canet-Vintró, Carlos López-de-Celis, Albert Perez-Bellmunt, Noé Labata-Lezaun, Ramón Aiguadé-Aiguadé, Jacobo Rodriguez-Sanz
CONTEXT: Anterior cruciate ligament injuries are directly related to the control of dynamic knee valgus in the landing of a jump, and this is mainly due to the correct activation and neuromuscular function of the lower-extremity muscles. The aim of the study is to assess the relationship between lower limb muscle activity during a single-legged drop jump and knee frontal plane projection angle (FPPA). DESIGN: A correlation study. METHODS: Thirty healthy collegiate female athletes were included in the study...
February 10, 2024: Journal of Sport Rehabilitation
https://read.qxmd.com/read/38332163/correlation-between-skeletal-muscle-acetylcarnitine-and-phosphocreatine-metabolism-during-submaximal-exercise-and-recovery-interleaved-1-h-31-p-mrs-7%C3%A2-t-study
#18
JOURNAL ARTICLE
Radka Klepochová, Fabian Niess, Martin Meyerspeer, Dorota Slukova, Ivica Just, Siegfried Trattnig, Jozef Ukropec, Barbara Ukropcová, Alexandra Kautzky-Willer, Michael Leutner, Martin Krššák
Acetylcarnitine is an essential metabolite for maintaining metabolic flexibility and glucose homeostasis. The in vivo behavior of muscle acetylcarnitine content during exercise has not been shown with magnetic resonance spectroscopy. Therefore, this study aimed to explore the behavior of skeletal muscle acetylcarnitine during rest, plantar flexion exercise, and recovery in the human gastrocnemius muscle under aerobic conditions. Ten lean volunteers and nine overweight volunteers participated in the study. A 7 T whole-body MR system with a double-tuned surface coil was used to acquire spectra from the gastrocnemius medialis...
February 8, 2024: Scientific Reports
https://read.qxmd.com/read/38304420/reliability-of-assessing-skeletal-muscle-architecture-and-tissue-organization-of-the-gastrocnemius-medialis-and-vastus-lateralis-muscle-using-ultrasound-and-spatial-frequency-analysis
#19
JOURNAL ARTICLE
Melanie Lesinski, Gregory Bashford, Adrian Markov, Lucie Risch, Michael Cassel
INTRODUCTION: The purpose of this study was to investigate inter- and intra-rater reliability as well as the inter-rater interpretation error of ultrasound measurements assessing skeletal muscle architecture and tissue organization of the gastrocnemius medialis (GM) and vastus lateralis (VL) muscle. METHODS: The GM and VL of 13 healthy adults (22 ± 3 years) were examined thrice with sagittal B-mode ultrasound: intraday test-retest examination by one investigator (intra-rater) and separate examinations by two investigators (inter-rater)...
2024: Frontiers in sports and active living
https://read.qxmd.com/read/38286938/muscle-tendon-unit-length-measurement-using-3d-ultrasound-in-passive-conditions-opensim-validation-and-development-of-personalized-models
#20
JOURNAL ARTICLE
Hugo Guenanten, Maëva Retailleau, Sylvain Dorel, Aurélie Sarcher, Floren Colloud, Antoine Nordez
This study investigated the validity of using OpenSim to measure muscle-tendon unit (MTU) length of the bi-articular lower limb muscles in several postures (shortened, lengthened, a combination of shortened and lengthened involving both joints, neutral and standing) using 3D freehand ultrasound (US), and to propose new personalized models. MTU length was measured on 14 participants and 6 bi-articular muscles (semimembranosus SM, semitendinosus ST, biceps femoris BF, rectus femoris RF, gastrocnemius medialis GM and gastrocnemius lateralis GL), considering 5 to 6 postures...
January 29, 2024: Annals of Biomedical Engineering
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