Acute Effects of Static Stretching on Muscle Hardness of the Medial Gastrocnemius Muscle Belly in Humans: An Ultrasonic Shear-Wave Elastography Study

Nakamura, Masatoshi; Ikezoe, Tome; Kobayashi, Takuya; Umegaki, Hiroki; Takeno, Yohei; Nishishita, Satoru; Ichihashi, Noriaki

doi:10.1016/j.ultrasmedbio.2014.03.024

Cited by 103 publications

(111 citation statements)

References 31 publications

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“…This is much higher compared with the results of previous studies examining the knee extension flexibility (5,6). This was also probably due to the intensity and duration of the stretching (6,7,9,13,14). In this study, the ROM was increased every 90 seconds during the 450-second stretching maneuver until the maximal ROM, until the participant report that he could not stretch further without felling pain, and stretching was superior to 300 seconds (7).…”

Section: Discussionmentioning

confidence: 53%

Effect of 8-Week High-Intensity Stretching Training on Biceps Femoris Architecture

Freitas

Mil‐Homens²

2015

Journal of Strength and Conditioning Research

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Previous studies have reported no changes on muscle architecture (MA) after static stretching interventions; however, authors have argued that stretching duration and intensity may not have been sufficient. A high-intensity stretching intervention targeting the knee flexors with an 8-week duration was conducted to observe the effects on biceps femoris long head (BF) architecture. Participants (n = 5) performed an average of 3.1 assisted-stretching sessions per week, whereas a control group (n = 5) did not perform stretching. The knee extension passive maximal range of motion (ROM), and BF fascicle length (FL), fascicle angle, and muscle thickness were assessed before and after the intervention. A significant increase was observed for FL (+12.3 mm, p = 0.04) and maximal ROM (+14.2°, p = 0.04) for the stretching group after the intervention. No significant changes were observed for the control group in any parameter. An 8-week high-intensity stretching program was observed to efficiently increase the BF FL, as well as the knee extension maximal ROM. Stretching intensity and duration may play an important role on MA adaptation.

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Section: Discussionmentioning

confidence: 53%

Effect of 8-Week High-Intensity Stretching Training on Biceps Femoris Architecture

Freitas

Mil‐Homens²

2015

Journal of Strength and Conditioning Research

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“…22,23 A new technique, shear-wave sonoelastography, has recently been commercialized. 10,[24][25][26][27][28][29][30][31][32][33] Shear-wave sonoelastography provides data on tissue stiffness by measuring the propagation speed of shear wave produced by an acoustic radiation force impulse. This technique is expected to lead to a reduction in operator dependency, high reproducibility and quantitative evaluation.…”

Section: Introductionmentioning

confidence: 99%

Shear-wave sonoelastography for assessing masseter muscle hardness in comparison with strain sonoelastography: study with phantoms and healthy volunteers

Ariji¹,

Nakayama²,

Nishiyama³

et al. 2016

Dentomaxillofacial Radiology

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Objectives: Shear-wave sonoelastography is expected to facilitate low operator dependency, high reproducibility and quantitative evaluation, whereas there are few reports on available normative values of in vivo tissue in head and neck fields. The purpose of this study was to examine the reliabilities on measuring hardness using shear-wave sonoelastography and to clarify normal values of masseter muscle hardness in healthy volunteers. Methods: Phantoms with known hardness ranging from 20 to 140 kPa were scanned with shear-wave sonoelastography, and inter-and intraoperator reliabilities were examined compared with strain sonoelastography. The relationships between the actual and measured hardness were analyzed. The masseter muscle hardness in 30 healthy volunteers was measured using shear-wave sonoelastography. Results: The inter-and intraoperator intraclass correlation coefficients were almost perfect. Strong correlations were seen between the actual and measured hardness. The mean hardness of the masseter muscles in healthy volunteers was 42.82 ± 5.56 kPa at rest and 53.36 ± 8.46 kPa during jaw clenching. Conclusions: The hardness measured with shear-wave sonoelastography showed high-level reliability. Shear-wave sonoelastography may be suitable for evaluation of the masseter muscles.

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“…However, in a previous study, we introduced a novel ultrasound technology to determine individual muscle flexibility (Umegaki et al, 2015), by measuring the shear elastic modulus called ultrasound shear wave elastography. Previous studies have reported that the shear elastic modulus measured by ultrasound shear wave elastography is a reliable index of individual muscle flexibility (Akagi and Takahashi, 2013;Nakamura et al, 2014;Taniguchi et al, in press).…”

Section: Introductionmentioning

confidence: 99%

Acute effects of static stretching on the hamstrings using shear elastic modulus determined by ultrasound shear wave elastography: Differences in flexibility between hamstring muscle components

et al. 2015

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Acute Effects of Static Stretching on Muscle Hardness of the Medial Gastrocnemius Muscle Belly in Humans: An Ultrasonic Shear-Wave Elastography Study

Cited by 103 publications

References 31 publications

Effect of 8-Week High-Intensity Stretching Training on Biceps Femoris Architecture

Effect of 8-Week High-Intensity Stretching Training on Biceps Femoris Architecture

Shear-wave sonoelastography for assessing masseter muscle hardness in comparison with strain sonoelastography: study with phantoms and healthy volunteers

Acute effects of static stretching on the hamstrings using shear elastic modulus determined by ultrasound shear wave elastography: Differences in flexibility between hamstring muscle components

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