Effects of Karate Fights on Achilles Tendon Stiffness Measured by Myotonometry

Pożarowszczyk, Beata; Pawlaczyk, Weronika; Smoter, Małgorzata; Zarzycki, Andrzej; Mroczek, Dariusz; Kumorek, Martyna; Witkowski, Kazimierz; Kawczyński, Adam

doi:10.1515/hukin-2017-0026

Cited by 27 publications

(37 citation statements)

References 19 publications

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“…The MyotonPRO device is a recently developed technique to quantify the stiffness of the Achilles tendon [ 15 , 16 ]. To our knowledge, the present study is the first study to investigate the intra- and inter-operator reliability of assessing the stiffness of the Achilles tendon.…”

Section: Discussionmentioning

confidence: 99%

“…Few studies have used the MyotonPRO to study tendon properties [ 15 , 16 ]. In one report, the MyotonPRO was found to be a feasible tool for quantifying acute changes in muscle and Achilles tendon elastic properties when participants were placed in a microgravity environment [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…In one report, the MyotonPRO was found to be a feasible tool for quantifying acute changes in muscle and Achilles tendon elastic properties when participants were placed in a microgravity environment [ 16 ]. Another study reported that the MyotonPRO can detect acute changes in Achilles tendon stiffness as a result of bouts of karate sparring [ 15 ]. To the authors’ knowledge, no studies have examined the reliability and precision of the MyotonPRO measurements of Achilles tendon elastic properties, and no studies have used the MyotonPRO to examine modulation in the stiffness of Achilles tendon during ankle joint motion.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the Stiffness of Achilles Tendon: Intra- and Inter-Operator Reliability and the Effect of Ankle Joint Motion

Liu

Wang

et al. 2018

Med Sci Monit

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BackgroundThe objectives of the present study were to examine the intra- and inter-operator reliability of the MyotonPRO device in quantifying the stiffness of the Achilles tendon and the device’s ability to examine the modulation in stiffness of the Achilles tendon during ankle joint flexion.Material/MethodsTwenty asymptomatic participants (10 males and 10 females; mean age: 25.0±3.1 years) were recruited for this study. The stiffness of the Achilles tendon was quantified using the MyotonPRO device.ResultsThe results revealed excellent intra- and inter-operator reliability for quantifying Achilles tendon stiffness with the ankle joint in a neutral position and detected a 13.9% increase in stiffness of the Achilles tendon between 0° and 30° of ankle joint flexion. The minimal detectable change (MDC) in tendon stiffness was 45 Newton/meter (N/m).ConclusionsOur findings indicated that the MyotonPRO device is a feasible method to quantify the stiffness of the Achilles tendon and monitor its changes. Thus, it is an essential tool to use to examine the modulation in the stiffness of the Achilles tendon due to pathology or interventions for future studies.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantifying the Stiffness of Achilles Tendon: Intra- and Inter-Operator Reliability and the Effect of Ankle Joint Motion

Liu

Wang

et al. 2018

Med Sci Monit

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“…More recently, a new hand-held device, called MyotonPRO, provides a reliable, accurate and sensitive way for the objective and non-invasive digital palpation of superficial skeletal muscles 26 , 27 . It enables measurement not only of muscles 27 , but also tendons 28 . Thus, MyotonPRO may become a basic evaluation technique in muscle and tendon assessment as a portable and convenient diagnostic and monitoring device in medical practice 29 – 31 .…”

Section: Introductionmentioning

confidence: 99%

Assessing the elastic properties of skeletal muscle and tendon using shearwave ultrasound elastography and MyotonPRO

Feng

Liu

et al. 2018

Sci Rep

164

170

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The purposes of this study were to compare Young’s modulus values determined by shear wave ultrasound elastography (SWUE) with stiffness index obtained using a hand-held MyotonPRO device on the resting stiffness of gastrocnemius muscle belly and Achilles tendon; and to examine the test-retest reliability of those stiffness measurement using hand-held MyotonPRO. Twenty healthy volunteers participated in the study. The measurement values of muscle and tendon was determined in dominant legs. Each marker point was assessed using MyotonPRO and SWUE, respectively. Intra-operator reliability of MyotonPRO was established in 10 of the subjects. The correlation coefficients between the values of muscle and tendon stiffness indices determined by MyotonPRO and SWUE were calculated. Significant correlations were found for muscle and tendon stiffness and Young’s modulus ranged from 0.463 to 0.544 (all P < 0.05). The intra-operator reliability ranged from good to excellent (ICC(3,1) = 0.787~0.928). These results suggest that the resting stiffness of gastrocnemius muscle belly and Achilles tendon measured by MyotonPRO is related to the Young’s modulus of those quantified by SWUE. The MyotonPRO shows good intra-operator repeatability. Therefore, the present study shows that MyotonPRO can be used to assess mechanical properties of gastrocnemius muscle belly and Achilles tendon with a resting condition.

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“…It calculates three basic parameters, including muscle stiffness. It is the biomechanical property of a muscle that resists either contraction or an external force, tending to deform its initial shape [14,15].…”

Section: Methodsmentioning

confidence: 99%

Effects of tDCS on Muscle Stiffness in Children with Cerebral Palsy Measured by Myotonometry: A Preliminary Study

Smoter¹,

Jędrzejczyk-Góral²,

Chen

et al. 2020

Applied Sciences

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Background: The aim of this study was to investigate the influence of transcranial direct current stimulation (tDCS) on the biceps brachii and flexor carpi radialis stiffness in children with cerebral palsy (CP). The authors also aimed to verify the relationship between spasticity and muscle stiffness. Methods: Twelve children with CP (mean ± SD; age, 8 ± 1.3 years; height, 118.7 ± 4.1 cm; weight, 23.0 ± 2.2 kg) were involved in the study. Muscle stiffness was estimated using a MyotonPRO device in a MultiScan pattern of five measurements. Simultaneously, the tDCS stimulation was performed. Spasticity was assessed by a neurologist using the Ashworth Scale. Results: Stiffness of the flexor carpi radialis muscle decreased significantly after tDCS therapy (p = 0.04). There was no significant change in stiffness of the biceps brachii. For all participants, the Spearman rank correlation showed statistically significant and positive relationships between muscle stiffness and the Ashworth Scale (p = 0.04). Conclusions: Transcranial direct current stimulation has a decreasing effect on stiffness and spasticity of the flexor carpi radialis in children with CP. The MyotonPRO device provides objective data and correlates with spasticity measurements.

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Effects of Karate Fights on Achilles Tendon Stiffness Measured by Myotonometry

Cited by 27 publications

References 19 publications

Quantifying the Stiffness of Achilles Tendon: Intra- and Inter-Operator Reliability and the Effect of Ankle Joint Motion

Quantifying the Stiffness of Achilles Tendon: Intra- and Inter-Operator Reliability and the Effect of Ankle Joint Motion

Assessing the elastic properties of skeletal muscle and tendon using shearwave ultrasound elastography and MyotonPRO

Effects of tDCS on Muscle Stiffness in Children with Cerebral Palsy Measured by Myotonometry: A Preliminary Study

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