Abstract: This study aimed to evaluate changes in i) muscle contractile properties of both lower extremities by using tensiomyography (TMG); ii) patients’ physical function, and iii) electromechanical efficiency (EME) of the gastrocnemius medialis muscle in total knee arthroplasty (TKA)patients from before to one-month after TKA. Methods: Twenty-six patients scheduled for TKA were included. Results: The significant muscle*time interaction was found for sustain time and maximal radial displacement (Dm) (η2≥0.219) only, whereas time*leg interaction was found for time delay and Dm (η2≥0.254) only. Post hoc analysis showed a significant decrease of Dm of vastus medialis and increase in contraction time (Tc) of both the vastus lateralis and rectus femoris muscles of the involved leg, respectively. Furthermore, reduction of knee extensors (-55.4%) and flexors (-22.2%) strength, timed up and go (-26.9%), 30s chair stand (-28.9%) and EME (-38.2%) was observed. Conclusion: TKA treatment altered physical function as well as contractile properties of the main skeletal muscles surrounding the involved joint in the early period after surgery; however, alterations showed to be both limb and muscle-specific. This might provide clinicians and physiotherapist with additional information on how to adapt rehabilitation to the needs of an individual patient.

Full article HERE!

THIS EVENT HAS BEEN POSTPONED DUE TO THE COVID-19 VIRUS. ALTERNATIVE DATES TO BE ANNOUNCED.

By University of Stirling.
This symposium, Evidence-based Practice in Sport: The Case for Tensiomyography (TMG), is a unique event tailored for sport- and health-professionals and practitioners who might work with athletes or the general public and who may or may not use TMG. Several key international speakers – representing both research and clinical backgrounds – have been invited to share their TMG knowledge and experience of practical application of TMG in high-performance settings. The goal of the symposium is to bridge the TMG-knowledge-gap between professionals and practitioners who work with athletes, and researchers who have studied the various benefits and advantages of TMG.

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See full schedule HERE!

A new scientific publication paper shows that the contraction velocity, assessed with tensiomyography (TMG), was the parameter which showed differences between time by muscle by muscle activation after fatiguing leg extension sets.

Abstract:
The purposes of this study were to analyze the effects of different types of muscle contraction (concentric and eccentric) on the passive muscular contraction properties of knee muscles and how muscle contraction can affect the muscles in different knee functions. In total, 23 active healthy men (age: 24.65 ± 1.95 years, height: 1.78 ± 0.05 m, mass: 75.33 ± 8.37 kg) participated in this study. Muscle soreness, muscle contractile properties assessed with tensiomyography (TMG) (vastus lateralis [VL] and biceps femoris [BF]), and isometric peak torque were tested before and immediately after 32 maximal repetitions of an isokinetic leg extension and flexion exercise at 180° per second. Muscle contractions were randomized to each subject’s leg. From the TMG variables, only contraction velocity showed significant interactions in time × muscle × contraction (p = 0.046; partial ηp2 = 0.19). A greater reduction was observed in the BF (−29.03%) than in the VL (−21.25%). There was a significant decrease in contraction velocity after concentric p < 0.001, d = 1.18) and eccentric (p = 0.007, d = 0.51) exercise for the BF, while for VL, a decrease was only observed after concentric exercise (p = 0.007, d = 0.66). The leg extension exercise showed reductions in the isokinetic peak torque (p < 0.001; partial ηp2 = 0.83). Isometric peak torque (p < 0.001; partial ηp2 = 0.80) and muscle soreness (p < 0.001; partial ηp2 = 0.70) decreased after exercise. In conclusion, muscle mechanical properties were differently affected in relation to the muscle contraction and knee muscles involved, after a fatiguing leg extension isokinetic exercise. Isometric peak torque and muscle soreness were also reduced immediately after exercise. These results are particularly important to understand how TMG parameters are modified depending on the type of contraction.

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We are proud to share the latest Tensiomyography (TMG) publication with you. Thirty-nine recreational athletes participated and TMG parameters of QF bellies and maximal voluntary isometric contraction (MVIC) were measured before and after a fatigue protocol. The authors believe that Tensiomyography (TMG), has emerged as a technique that can assess the presence of peripheral fatigue without requiring additional voluntary efforts.Conclusion of the study: “Since the QF is the main strength contributor during multiple physical activities, clinicians and trainers will be able to discriminate the presence of fatigue and the magnitude of changes in the QF strength by TMG evaluation”

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Forty-eight volunteers’ well-trained male cyclists were evaluated during the competition season within a recovery microcycle. Tensiomyography was used before and after performing an incremental test until exhaustion in cycle ergometer to measure the radial muscle belly displacement of the vastus lateralis (VL), rectus femoris (RF), and biceps femoris (BF) on the dominant leg. Maximum radial muscle belly displacement (Dm), contraction time (Tc), delay time (Td), sustain time (Ts), and radial displacement velocity (Vrd) were measured. Mixed-design factorial analysis of variance was used to detect changes in the mechanical and neuromuscular characteristics after a maximal incremental exercise test.

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Background: There have been still few objective outcome measures regarding the effect of botulinum toxin type A treatment. Tensiomyography (TMG) is used as a device that can non-invasively evaluate skeletal muscle, however, no reports have been found that the effects of botulinum toxin type A treatment have been evaluated by the characteristics of muscle contraction using TMG.

Objective: To evaluate the clinical usefulness of quantitative assessment using TMG before and after injection of botulinum toxin type A in patients after stroke.

 

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We’re proud to announce that Tensiomyography has been used in over 160 scientific publications! The first article was published in 1997 by professor Valenčič from the University of Ljubljana.
Tensiomyography as a method which precisely measures the speed of muscle contraction and muscle stiffness, has been applied in the fields of Anatomy, Anthropology, Biochemistry, Biology, Cardiology, Embryology, Medicine, Neurology, Nutrition, Pathology and Physiology.

Check out the full list of publications HERE!

Measurement of muscle specific contractile properties in response to resistance training (RT) can provide practitioners valuable information regarding physiological status of individuals. Field based measurements of such contractile properties within specific muscle groups, could be beneficial when monitoring efficacy of training or rehabilitation interventions. Tensiomyography (TMG) quantifies contractile properties of individual muscles via an electrically stimulated twitch contraction and may serve as a viable option in the aforementioned applications. Thus, aims of this study were; (i) to investigate the potential use of TMG to quantify training adaptations and differences, in response to exercise specific lower limb RT; and (ii) investigate any associations between TMG parameters and accompanying muscle architectural measures.

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Neuromuscular characteristic of Biceps Femoris muscle in the top Serbian soccer players measured by Tensiomyography method: quantitative model

The study was performed on 54 healthy top-level soccer players.

The main aim of this study was to define the quantitative neuromuscular characteristics of Biceps Femoris muscle (BF) as the knee joint flexor, i.e. the major synergist of caudal body in all specific movement tasks of a football player, measured by tensiomyography (TMG) method . The secondary aim of the study was to compare all TMG-BF characteristics in relation to bilateral dimorphism, as well as to compare dominant and non-dominant legs

 

Read more: http://casopisi.junis.ni.ac.rs/index.php/FUPhysEdSport/article/view/5320/0

Abstract: Using Tensiomyography we evaluated a patient that had Achilles tendon rupture surgery. The contralateral normal side measurements were also performed for evaluation and comparison of the site of injury.

The occurrence of Achilles tendon rupture happens in 2% of the population per year. In recent years there has been an increased interest in middle-aged and older patients in physical conditioning and joining in with athletic activities. There are two types of Achilles tendon ruptures. One is from direct trauma and another from indirect causes. Indirect causes are more frequent and result from a combination of mechanical stress and degeneration. Achilles tendon operation results are affected by several factors like age, muscle-tendon flexibility, strength, rupture site, etc. The factors that interest us most are muscle-tendon flexibility and strength of the calf muscle. TMG can evaluate the function of skeletal muscle through contraction time (Tc), maximal displacement (Dm), and other parameters.

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