80 participants with bilateral reduced hamstring flexibility were randomized into four groups: Stretching, Neurodynamic, PNM, and Needle groups. All interventions were performed on the right limb. Each participant’s leg was subjected to SLR testing and tensiomyography before and after the interventions.
Each group improved their SLR values in the non-intervention limb compared to baseline values, but the PNM and Needle groups obtained higher values for the SLR test in the non-intervention limb compared with the Neurodynamic and Stretching groups. There were statistically significant differences for mean SLR measures between limbs pre- and post-intervention for all groups except the PNM group, suggesting crossover effects for PNM but not the other techniques studied. There were no differences in tensiomyographic assessments between groups or between sides, at baseline or upon completion of the study.
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The aim was to determine the effect of changing pulse duration and electrode size on muscle contractile properties. The authors suggested stimulus pulse duration of 1ms together with a 5 × 5cm electrode is necessary to reach a reliable and reproducible assessment. This finding concludes that the Tensiomyography measuring protocol is optimal.
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Recently, a few papers have suggested that tissue flossing (TF) acutely improves range of motion (ROM) and neuromuscular performance. Tensiomyography helped the authors in this study to confirm that TF applied to the ankle is a valid method to increase ROM and at the same time maintaining muscular stiffness.
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We are happy to receive new Tensiomyography publication, where TMG was used together with Isokinetic system on 60 patients with ACL reconstructions. Both systems were compliant and each system provided different type of useful information to the researchers. Tensiomyography revealed higher biceps femoris as well as semitendinosus and semimembranosus radial displacement values on the operated leg in Normal group. Isokinetic dynamometry showed significantly higher normalised peak torque and average power of knee extensor muscles. Decreased hamstring stiffness seems to be the key to higher return-to-preinjury activity. The authors conclude that postoperative rehabilitation should be more focused on reducing hamstring stiffness.
Ger article HERE!
Futsal is a team sport involving intermittent technical actions of high intensity, and high physical (strength) and muscular demands. In this regard, the Tensiomyography (TMG) is a useful and non-invasive tool for the monitoring and assessment of the muscle’s contractile capacity. This study aimed to analyze the changes in the contractile properties produced during the season, as well as to determine the potential cumulative effect of a resistance training (RT) program in futsal players.
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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.
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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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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.
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.