Article
Sport Sciences
Lei Zhi, Naokazu Miyamoto, Hisashi Naito
Summary: Eccentric hamstring exercises can reduce the risk of hamstring strain injury in the biceps femoris long head. This study found that low-volume, slow-velocity eccentric knee flexion exercise specifically reduces passive stiffness in the BFlh.
JOURNAL OF SPORTS SCIENCE AND MEDICINE
(2022)
Article
Sport Sciences
Sandro R. Freitas, Bruno Mendes, Telmo Firmino, Jose Pedro Correia, Erik E. M. C. Witvrouw, Raul Oliveira, Joao R. Vaz
Summary: This study examined the active stiffness of semitendinosus and biceps femoris long head during knee flexor isometric contraction in elite footballers and found that lower limbs with previous hamstring injuries had lower active stiffness in the biceps femoris long head at the start of the task. During the task, the active stiffness of semitendinosus decreased in both groups while the biceps femoris long head active stiffness remained unchanged, resulting in an increase in the biceps femoris long head to semitendinosus active stiffness ratio in both groups.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2022)
Article
Surgery
L. Lempainen, J. Kosola, R. Pruna, J-J. Sinikumpu, X. Valle, O. Heinonen, S. Orava, N. Maffulli
Summary: The study introduces modern treatment principles for hamstring injury management, emphasizing the importance of individualized treatment for each tendon. It provides a detailed overview of typical clinical and imaging findings as well as surgical treatment, based on a critical review of available literature and personal experience.
SCANDINAVIAN JOURNAL OF SURGERY
(2021)
Article
Sport Sciences
Emilio Farfan, Santiago Rojas, Ramon Olive-Vilas, Alfonso Rodriguez-Baeza
Summary: The study identified a group of muscle fibers from the semitendinosus muscle originating from the proximal aspect of the long head of biceps femoris, with specific morphological characteristics that may play a significant role in hamstring injuries.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2021)
Article
Acoustics
Jacqueline Roots, Gabriel S. Trajano, Christopher Drovandi, Davide Fontanarosa
Summary: This study assessed the application of wave elastography in muscle stiffness assessment and compared the measurement results of two different devices. The study found significant differences in stiffness variability among different muscle regions, with the 75% location having the lowest variability and highest agreement, suggesting its use in future stiffness assessments.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2023)
Article
Biophysics
Kenta Iwane, Ko Yanase, Tome Ikezoe, Noriaki Ichihashi
Summary: This study used shear wave elastography (SWE) to measure the shear elastic moduli of BBL and BBS and determine the positions where they were most stretched. The results showed that shoulder extension + external rotation and shoulder horizontal abduction + internal rotation positions had the highest shear elastic moduli for BBL and BBS, providing evidence for effective stretching of these muscles.
JOURNAL OF BIOMECHANICS
(2023)
Article
Multidisciplinary Sciences
Maximilian Neidhardt, Robin Mieling, Marcel Bengs, Alexander Schlaefer
Summary: Robotic assistance in minimally invasive surgery has advantages but lacks force feedback, making accurate tool-tissue interaction force estimation a challenge. Image-based force estimation, using observed deformation and learning methods, offers a promising solution. In this work, optical coherence tomography is used to combine tissue deformation detection with shear wave elastography for accurate force estimation. A multi-input deep learning network processing local elasticity estimates and volumetric image data yields the best performance. The approach also shows generalization to other tissue properties.
SCIENTIFIC REPORTS
(2023)
Article
Medicine, General & Internal
Julia Oppold, Maria-Sophie Breu, Alireza Gharabaghi, Alexander Grimm, Nicholas A. A. Del Grosso, Mohammad Hormozi, Benedict Kleiser, Philipp Klocke, Cornelius Kronlage, Daniel Weiss, Justus Marquetand
Summary: Muscle ultrasound shear wave elastography (SWE) can provide a refined assessment of rigidity in Parkinson's disease (PD) and correlates with the Unified Parkinson's Disease Rating Scale. SWE can be used to track therapeutic effects and modify rigidity measurements.
Article
Sport Sciences
Naokazu Miyamoto, Kosuke Hirata
Summary: The study found that differences in muscle stiffness and proximal aponeurosis strain of the biceps femoris long head are minimal across different sites, and there is no exceptional muscle stiffness and proximal aponeurosis strain at moderate-to-high contraction intensity where sprinting-type hamstring strain typically occurs.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2021)
Article
Engineering, Biomedical
Ricardo Pimenta, Pedro Almeida, Jose P. Correia, Paula M. Bruno, Joao R. Vaz, Sandro R. Freitas
Summary: This study investigated the effects of fatigue on the passive and active shear modulus of hamstring and gluteus maximus muscles during hip extension and knee flexion tasks. The results showed no differences in the fatigue effects on passive shear modulus between muscles and tasks. However, there was an interaction between tasks and muscles for the active shear modulus.
SPORTS BIOMECHANICS
(2023)
Article
Food Science & Technology
Rozita Vaskoska, Minh Ha, Lydia Ong, Gavin Kearney, Jason D. White, Sally Gras, Robyn D. Warner
Summary: This study explores the effects of ageing, cathepsin inhibition, and temperature on fiber shrinkage in different bovine muscles during heating. The results show that aging and cathepsin activity can influence the shrinkage process, potentially affecting cooking loss. Further research is needed to optimize thermal meat processing based on these factors.
Article
Multidisciplinary Sciences
Cong Wang, Ying Che
Summary: This study developed a nomogram based on quantitative ultrasound parameters to predict breast cancer. A total of 313 breast tumors with pathological results were included, and a nomogram was developed through multivariate regression analysis. The nomogram showed excellent predictive properties with high sensitivity, specificity, and accuracy. It can be potentially useful for predicting breast cancer.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Biomedical
Manuela Zimmer, Benedict Kleiser, Justus Marquetand, Filiz Ates
Summary: Mechanical properties of the biceps brachii muscle were studied using shear wave elastography (SWE) in relation to elbow joint position and contraction intensity during isometric contraction. The shear elastic modulus of the biceps brachii increased with increasing elbow angle in the passive state, while maximum elbow flexion torque decreased with increasing elbow angle. Both elbow angle and contraction intensity had significant effects on the shear elastic modulus during sub-maximal contractions, while only contraction intensity affected sEMG amplitude of the biceps brachii. SWE can detect length-dependent mechanical changes of the biceps brachii and can be used to characterize active muscle properties in vivo.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Orthopedics
Thomas Tampere, Jan Victor, Thomas Luyckx, Hannes Vermue, Nele Arnout, Erik Witvrouw, Joke Schuermans
Summary: The study found that ACL reconstruction surgery using ST tendon autograft may significantly influence hamstring muscle function, leading to an increase in relative BF activity and a decrease in relative ST activity. These changes in hamstring muscle activation pattern may have implications for athletic performance and injury risk.
AMERICAN JOURNAL OF SPORTS MEDICINE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Zi-Tong Chen, Feng-Shan Jin, Le-Hang Guo, Xiao-Long Li, Qiao Wang, Hui Zhao, Li-Ping Sun, Hui-Xiong Xu
Summary: This study assessed muscle mass and function in elderly patients with type 2 diabetes using ultrasound and shear wave elastography. Various clinical indicators were measured, and the thickness, cross-sectional area, and shear wave elastography values of the rectus femoris muscle were also measured. The study found independent predictors for sarcopenia and established a diagnostic model with high accuracy.
EUROPEAN RADIOLOGY
(2023)
Article
Sport Sciences
Masatoshi Nakamura, Andreas Konrad, Kazuki Kasahara, Riku Yoshida, Yuta Murakami, Shigeru Sato, Kodai Aizawa, Ryoma Koizumi, Jan Wilke
Summary: This study compared the effects of static stretching (SS) and foam rolling (FR) performed in different orders on tissue properties, pain sensitivity, and motor function. The results suggest that SS should be followed by FR when aiming to increase range of motion and reduce tissue hardness without affecting muscle strength.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2023)
Article
Geriatrics & Gerontology
Masahide Yagi, Masashi Taniguchi, Hiroshige Tateuchi, Tetsuya Hirono, Yoshihiro Fukumoto, Momoko Yamagata, Ryusuke Nakai, Yosuke Yamada, Misaka Kimura, Noriaki Ichihashi
Summary: This study used MRI to investigate the iliocapsularis muscle (IC) in healthy individuals and found that it could be identified in 85% to 95% of people. The study also revealed that the cross-sectional area (CSA) of the IC is only associated with sex and not age. However, the CSA of other lower-limb muscles was found to be associated with both sex and age.
Article
Acoustics
Jun Umehara, Norio Fukuda, Shoji Konda, Masaya Hirashima
Summary: This study validated the accuracy of the Freehand 3-D ultrasound (3DUS) system in measuring the three-dimensional surface shape and volume of shoulder muscles. The results showed a small difference between 3DUS and magnetic resonance imaging (MRI), indicating that 3DUS can be used as an alternative method for measuring muscle morphology.
ULTRASOUND IN MEDICINE AND BIOLOGY
(2022)
Article
Physiology
Riku Yoshida, Kazuki Kasahara, Yuta Murakami, Shigeru Sato, Kazunori Nosaka, Masatoshi Nakamura
Summary: This study compared the fatigue profiles of the biceps brachii muscle during repetitive maximal concentric and eccentric contractions, and found that the muscle had greater fatigue resistance during eccentric contractions compared to concentric contractions.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Orthopedics
Jun Umehara, Masahide Yagi, Yasuyuki Ueda, Shusuke Nojiri, Kotono Kobayashi, Takashi Tachibana, Katsuya Nobuhara, Noriaki Ichihashi
Summary: Rotator cuff tear is a common shoulder injury that causes shoulder dysfunction and pain. Surgical repair is the primary treatment, but impaired force exertion and compensatory changes in synergist muscles persist even after repair. This study aimed to identify the compensation strategy of shoulder abductors in patients with rotator cuff repair. The results showed individual variations in the compensatory increase of specific muscles, suggesting a non-stereotypical compensation strategy in these patients.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Review
Sport Sciences
Kosuke Takeuchi, Masatoshi Nakamura, Andreas Konrad, Takamasa Mizuno
Summary: Static stretching training has been found to decrease muscle stiffness, but there is no significant relationship between total stretching duration and muscle stiffness.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Article
Health Care Sciences & Services
Andreas Konrad, Kazuki Kasahara, Riku Yoshida, Yuta Murakami, Ryoma Koizumi, Masatoshi Nakamura
Summary: This study aimed to investigate the repeated application of PPT tests in different muscles. The results showed a significant increase in PPT in the elbow flexors and knee extensors, starting from the eighth and ninth assessments, respectively. However, there was no significant change in the ankle plantar flexor muscles. Based on these findings, it is recommended to perform between two and seven PPT assessments to avoid overestimation.
Review
Geriatrics & Gerontology
Masatoshi Nakamura, Kosuke Takeuchi, Taizan Fukaya, Gakuto Nakao, Andreas Konrad, Takamasa Mizuno
Summary: Static stretching can decrease the passive stiffness of the muscle-tendon unit (MTU) and/or muscles in older adults. The effects of static stretching on stiffness are comparable between older and young adults.
ARCHIVES OF GERONTOLOGY AND GERIATRICS
(2024)
Article
Physiology
Haruka Sakata, Hiroshige Tateuchi, Masahide Yagi, Kotono Kobayashi, Noriaki Ichihashi
Summary: This study investigated the age-related changes in the iliocapsularis (IC) muscle and other hip muscles. The results showed significant changes in the muscle quality of the IC, with weaker correlation compared to the iliacus or rectus femoris muscles.
CLINICAL PHYSIOLOGY AND FUNCTIONAL IMAGING
(2023)
Article
Physiology
Riku Yoshida, Kazuki Kasahara, Yuta Murakami, Shigeru Sato, Midori Tanaka, Kazunori Nosaka, Masatoshi Nakamura
Summary: The purpose of this study was to investigate whether muscle strength would still increase when the frequency of 3-s maximal eccentric contraction training was reduced to 2 or 3 days per week. The results suggest that at least three days per week of training are necessary for increasing muscle strength, and more frequent sessions in a week (e.g., 5 days) appear to induce greater increases in muscle strength.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Geriatrics & Gerontology
Yoshihiro Fukumoto, Masashi Taniguchi, Tetsuya Hirono, Masahide Yagi, Momoko Yamagata, Ryusuke Nakai, Yosuke Yamada, Misaka Kimura, Noriaki Ichihashi
Summary: The results of this study suggest that ultrasound measurements at the distal thigh can predict MV, IntraMAT, and muscle strength of the QF to the same degree as those at the mid-thigh.
CLINICAL INTERVENTIONS IN AGING
(2023)
Article
Rheumatology
Masashi Taniguchi, Yoshihiro Fukumoto, Masahide Yagi, Tetsuya Hirono, Momoko Yamagata, Akihiro Asayama, Shogo Okada, Ryusuke Nakai, Masashi Kobayashi, Noriaki Ichihashi
Summary: This study aimed to clarify the characteristics of muscle degeneration in individual quadriceps muscles in early knee OA and elucidate the association of muscle volume and intraMAT with knee dysfunction. The findings showed that higher VM intraMAT is characteristic of quadriceps muscle degeneration in early knee OA and its increase is associated with functional disabilities and symptoms.
ARTHRITIS RESEARCH & THERAPY
(2023)
Article
Geriatrics & Gerontology
Yu Sato, Masashi Taniguchi, Yoshihiro Fukumoto, Shogo Okada, Zimin Wang, Kaede Nakazato, Nanami Niiya, Yosuke Yamada, Misaka Kimura, Noriaki Ichihashi
Summary: This study aimed to determine the minimal clinically important difference for a modified Gait Efficacy Scale (mGES) and identify predictors of mGES decline. The findings showed that a decline of 7.38 points in mGES over 3 years was clinically significant, and poor agility and walking endurance were predictors of gait efficacy decline.
GERIATRICS & GERONTOLOGY INTERNATIONAL
(2023)
Article
Rehabilitation
Yuta Murakami, Satoru Nishida, Riku Yoshida, Kazuki Kasahara, Akira Kumazaki, Hirokazu Sakuma, Hirosi Fujimoto, Yuki Kaneko, Otoka Abe, Masatoshi Nakamura
Summary: This study examined the relationship between Nordic hamstring strength and single leg bridge test scores in university soccer players and found no significant correlation between the two. Nordic hamstring strength and single leg bridge test scores may represent different aspects of muscle strength and endurance.
JOURNAL OF SPORT REHABILITATION
(2023)
