Article
Chemistry, Multidisciplinary
Polyxeni Spiliopoulou, Spyridon Methenitis, Nikolaos Zaras, Angeliki-Nikoletta Stasinaki, Maria Krekoukia, Stavroula Tsitkanou, Gerasimos Terzis
Summary: The aim of this study was to determine the best surrogate of quadriceps hypertrophy by evaluating the four muscle heads of the quadriceps femoris using ultrasonography. The results suggest that changes in muscle hypertrophy in the vastus lateralis and vastus intermedius can significantly predict overall quadriceps hypertrophy in response to resistance training.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Fermin Naranjo-Cinto, Daniel Pecos-Martin, Juan Nicolas Cuenca-Zaldivar, Alexander Achalandabaso-Ochoa, Jessica Quintero-Perez, Pilar Bierge-Sanclemente, Maria Garcia-Escudero, Samuel Fernandez-Carnero
Summary: This study aimed to determine the relationship between the behavior of the rectus femoris and vastus intermedius muscles measured by rehabilitative ultrasound imaging and anthropometric measurements. The results showed that there were significant correlations between the thickness and contraction of the vastus intermedius muscle and thigh perimetry, as well as the length of the rectus femoris muscle and dominant lower limb length.
APPLIED SCIENCES-BASEL
(2023)
Article
Agriculture, Dairy & Animal Science
Johanna Dietrich, Stephan Handschuh, Robert Steidl, Alexandra Boehler, Gerhard Forstenpointner, Monika Egerbacher, Christian Peham, Hanna Schoepper
Summary: The longissimus dorsi muscle plays a crucial role in the stability of the equine spine and proper locomotion. This study investigated the internal architecture of the muscle in different compartments and provided morphometric parameters for future biomechanical modeling. The findings revealed variations in fascicle length, pennation angles, muscle volume, and PCSA along the muscle, laying the foundation for simulating muscle function under different conditions and comparisons with other species.
Article
Nutrition & Dietetics
Ian C. Smith, Curtis Ostertag, Jennifer J. O'Reilly, Jaqueline L. Rios, Teja Klancic, Graham Z. MacDonald, Kelsey H. Collins, Raylene A. Reimer, Walter Herzog
Summary: This study investigated the impact of diet-induced obesity on contractile function of skeletal muscle fibers in male Sprague-Dawley rats. The results showed that a high-fat, high-sucrose diet led to impaired force output in fibers expressing MHC I or MHC IIa in some cohorts of rats, while other measures of contractile function were not significantly affected by the diet.
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
(2021)
Article
Multidisciplinary Sciences
Hiroshi Akima, Kazuhiro Maeda, Norihiro Shima
Summary: The study compares the neuromuscular activation patterns of the different muscles of the quadriceps femoris during isokinetic concentric and eccentric contractions. Thirteen healthy men performed knee extensions at various velocities and joint angles, and the surface electromyographic activities were recorded. The results show that the neuromuscular activation of the quadriceps femoris is angle-dependent, with the vastus intermedius playing a significant role during flexed contractions.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Nikolaos Zaras, Angeliki-Nikoletta Stasinaki, Polyxeni Spiliopoulou, Thomas Mpampoulis, Marios Hadjicharalambous, Gerasimos Terzis
Summary: The study showed that inter-repetition rest during strength training can effectively increase lower body explosive strength and muscle fascicle length without compromising muscle hypertrophy.
APPLIED SCIENCES-BASEL
(2021)
Article
Biophysics
Bryan Yu, Walter Herzog
Summary: The study aimed to determine the in vivo operating range of the vastus lateralis (VL) muscle during speed skating imitation and compare it to the muscle's force-length relationship. The results showed that the VL muscle works at sub-optimal length during the gliding phase of skating, but at optimal length for maximal force production during the crucial pushoff phase.
JOURNAL OF BIOMECHANICS
(2023)
Article
Sport Sciences
Clarissa M. Brusco, Ronei S. Pinto, Anthony J. Blazevich
Summary: This study compared the measurements of biceps femoris long-head fascicle length, fascicle angle, and muscle thickness obtained through different methods. The results showed significant correlations between extended field-of-view sonographic images and other measurement techniques, with the collage method demonstrating the highest reliability and correlation.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Sport Sciences
Yi-Chung Lin, Marcus G. Pandy
Summary: This study combined a full-body musculoskeletal model with dynamic optimization theory to predict the biomechanics of maximum-speed sprinting and evaluate the effects of changes in muscle-tendon properties on sprint performance. The results showed that sprint performance was most sensitive to changes in muscle strength and least affected by changes in tendon compliance. Additionally, muscle fascicle length had a greater impact on sprint performance compared to muscle intrinsic maximum shortening velocity.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Chemistry, Analytical
Saru Meena Ramu, Panagiotis Chatzistergos, Nachiappan Chockalingam, Adamantios Arampatzis, Constantinos Maganaris
Summary: Existing approaches for automated tracking of fascicle length and pennation angle have limitations, but this study proposes a new method that quantifies changes in length and angle based on distortion patterns within the fascicle band, without the need for a single fascicle or specific intensity pattern.
Article
Geriatrics & Gerontology
Sabrina Pinel, Nicole Y. Kelp, Jessica M. Bugeja, Bart Bolsterlee, Francois Hug, Taylor J. M. Dick
Summary: This study compared differences in muscle volume, structure, intramuscular fat levels, and shear modulus in the triceps surae of younger and older adults. Older adults had higher intramuscular fat levels yet similar muscle volumes, and this increase in fat content was associated with lower muscle shear modulus. Additionally, the study found that considering intramuscular fat content when assessing physiological cross-sectional area showed a modest increase in its association with ankle strength, highlighting the role of skeletal muscle fat infiltration in age-related strength deficits.
EXPERIMENTAL GERONTOLOGY
(2021)
Article
Sport Sciences
Declan S. Carmichael, Jack T. Hickey, Paul J. Tofari, Matthew N. Bourne, Mark R. Ward, Ryan G. Timmins
Summary: This study aimed to investigate the adaptations in hamstring architectural, strength, and morphological changes after eccentric or isometric hip extension exercise interventions. The results showed that the eccentric exercise intervention significantly increased the length of the biceps femoris long head fascicles and led to increased muscle volume, while the isometric exercise intervention only resulted in an increase in the volume of the semitendinosus muscle.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Multidisciplinary Sciences
Brent J. Raiteri, Leon Lauret, Daniel Hahn
Summary: This study aimed to estimate the force-length relation of the tibialis anterior (TA) muscle. The results showed that TA produced its maximum active force at 15° dorsiflexion, and its force-length curve agreed with a sarcomere model within the muscle. These findings are important for predicting forces during movement.
Article
Sport Sciences
Akane Yoshimura, Takayuki Inami, Robert Schleip, Shinshiro Mineta, Kohei Shudo, Norikazu Hirose
Summary: This study found that self-myofascial release using a foam roller can improve muscle range of motion without influencing muscle morphology. The results suggest that further research is needed to investigate other factors related to range of motion.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2021)
Article
Nutrition & Dietetics
Mary F. O'Leary, Sarah R. Jackman, Vlad R. Sabou, Matthew I. Campbell, Jonathan C. Y. Tang, John Dutton, Joanna L. Bowtell
Summary: Shatavari may improve muscle function and contractility via myosin conformational change, warranting further investigation in larger and more diverse cohorts.
