Article
Sport Sciences
Carlos Rodriguez-Lopez, David Beckwee, Frank P. Luyten, Dieter Van Assche, Evelien Van Roie
Summary: This study aimed to investigate knee extensor muscle deficits in postmenopausal women with knee osteoarthritis and their impact on functional performance. The research found that these women exhibited weaknesses in both maximal isometric torque and rate of torque development, as well as impaired torque production at slower velocities. These deficits were associated with decreased functional performance, particularly during activities like stair climbing.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2021)
Article
Sport Sciences
Julian Alcazar, Fernando Pareja-Blanco, Carlos Rodriguez-Lopez, Roberto Navarro-Cruz, Pedro J. Cornejo-Daza, Ignacio Ara, Luis M. Alegre
Summary: This study found that the force-velocity relationship in multi-joint exercises is best fitted by double-hyperbolic models, while linear models may be more suitable for assessing specific ranges of the force-velocity relationship. The muscle excitation levels did not significantly affect the F-V relationship, highlighting the importance of selecting appropriate mathematical models for accurate analysis of force-velocity data.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2021)
Article
Physiology
Julian Alcazar, Fernando Pareja-Blanco, Carlos Rodriguez-Lopez, Hector Gutierrez-Reguero, Juan Sanchez-Valdepenas, Pedro J. Cornejo-Daza, Ignacio Ara, Luis M. Alegre
Summary: The study aimed to provide a force-velocity equation that combines a linear and a hyperbolic region and compare it with linear equations. The hybrid equation showed a better fit to the recorded data and provided relevant results. Significant differences were found between the results derived from the hybrid equation and linear equations in some parameters.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Article
Physiology
Lejun Wang, Xiaoqian Song, Hua Yang, Ce Wang, Qineng Shao, Haifeng Tao, Minjie Qiao, Wenxin Niu, Xiaodong Liu
Summary: This study examined the fatigue of antagonist muscles during a low-force isometric contraction. The results suggest that antagonist muscles may experience peripheral fatigue during prolonged low-force isometric fatiguing contractions. Additionally, changes in coactivation activities are influenced by both central neuronal mechanisms and peripheral metabolic factors.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Physiology
Zhaoqian Li, Peng Zhi, Zhi Yuan, Amador Garcia-Ramos, Mark King
Summary: This study aimed to explore the feasibility of using vertical force-velocity (F-V) profiles to monitor changes in muscle function following different fatigue protocols. The results showed that the vertical F-V profile had acceptable between-day reliability and high sensitivity to detect the acute effects of force-oriented and velocity-oriented fatigue protocols on specific maximal neuromuscular capacities.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Susan W. Herring, Zi-Jun Liu, Katherine L. Rafferty, Michael C. Baldwin, Atriya Salamati, Cambria Cunningham, Birkin Owart, Basma Tamasas
Summary: This study assessed the masticatory function and musculoskeletal structure after multiple Botulinum neurotoxins (BoNT) treatment. The results showed that although muscle function can mostly be regained after each injection, multiple doses of BoNT caused extensive damage to the muscles and decreased bone density in the mandible.
ARCHIVES OF ORAL BIOLOGY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Susan W. Herring, Zi-Jun Liu, Katherine L. Rafferty, Michael C. Baldwin, Atriya Salamati, Cambria Cunningham, Birkin Owart, Basma Tamasas
Summary: This study found that rabbits receiving multiple doses of BoNT showed extensive muscle damage, including muscle atrophy and decreased bone density, especially during the recovery period after treatment.
ARCHIVES OF ORAL BIOLOGY
(2022)
Article
Geriatrics & Gerontology
Julian Alcazar, Carlos Rodriguez-Lopez, Christophe Delecluse, Martine Thomis, Evelien Van Roie
Summary: This study evaluated the longitudinal changes in the torque-velocity relationship and maximum muscle power (P-max) of knee extensor muscles in young, middle-aged, and older adults after a 10-year follow-up. The results showed that P-max decreased with age, with early declines in force and later declines in both force and velocity.
JOURNAL OF CACHEXIA SARCOPENIA AND MUSCLE
(2023)
Article
Multidisciplinary Sciences
Luis G. Rosa, Jonathan S. Zia, Omer T. Inan, Gregory S. Sawicki
Summary: This study combines traditional machine learning models with B-mode ultrasound recordings to achieve real-time tracking of human soleus muscle fascicles in different contractile conditions. By analyzing the data, the accuracy and performance of each model were evaluated, demonstrating the effectiveness and potential applications of this method.
Review
Biophysics
Daniel Hahn, Seong-won Han, Venus Joumaa
Summary: The cross-bridge theory predicts muscle force based on muscle length and active muscle length changes. However, residual force enhancement (rFE) and residual force depression (rFD) have been observed, which challenge the cross-bridge theory. Recent research suggests that the elastic element titin may play a role in explaining muscle history-dependence. Understanding titin function is crucial for establishing a new three-filament muscle model that includes titin.
JOURNAL OF BIOMECHANICS
(2023)
Article
Pediatrics
Junya Saeki, Satoshi Iizuka, Hiroaki Sekino, Ayahiro Suzuki, Toshihiro Maemichi, Suguru Torii
Summary: The study investigated the change in the optimum angle of force production in male adolescence, and found that muscle flexibility decreases temporarily due to growth after PHV, leading to changes in the optimum angle.
Article
Hospitality, Leisure, Sport & Tourism
Alejandro Perez-Castilla, Rodrigo Ramirez-Campillo, John F. T. Fernandes, Amador Garcia-Ramos
Summary: This study aimed to examine the reliability and validity of load-velocity (L-V) relationship variables obtained through the 2-point method using different load combinations and velocity variables. The results showed that the 2-point method obtained from a heavy squat load and MV or MPV is a quick, safe, and reliable procedure to evaluate the lower-body maximal neuromuscular capacities through the L-V relationship.
JOURNAL OF SPORT AND HEALTH SCIENCE
(2023)
Article
Multidisciplinary Sciences
Amelie Werkhausen, Oyvind Gloersen, Antoine Nordez, Goran Paulsen, Jens Bojsen-Moller, Olivier R. Seynnes
Summary: This study assessed the relationship between muscle architecture and function using ultrasound-based methods. The results showed moderate correlations between different measurements of muscle architecture, but weak correlations between muscle architecture and force or work. These findings indicate the limitations of current approaches to measure muscle architecture in vivo.
Article
Sport Sciences
Matthew R. Cross, Jean Romain Riviere, Nicolas Coulmy, Jean-Benoit Morin, Pierre Samozino
Summary: The study aimed to investigate the effects of different disciplines and performance levels on lower limb force production qualities. The results showed that speed athletes had greater dynamic force at low velocities, while technical athletes had higher maximum isometric force. Higher ranked athletes displayed stronger force profiles and faster rate of force development.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2021)
Article
Orthopedics
Taylor M. Winters, Michael Lim, Mitsuhiko Takahashi, Jan Friden, Richard L. Lieber, Samuel R. Ward
Summary: The study aimed to quantify the effect of surgical mobilization on the active and passive biomechanical properties of three large rabbit hind limb muscles. Results showed that different muscles exhibited varying degrees of decline in active and passive stress after mobilization, indicating a trade-off between muscle mobility and force-generating capacity.
JOURNAL OF HAND SURGERY-AMERICAN VOLUME
(2021)