Article
Chemistry, Multidisciplinary
Dario Santos, Fernando Massa, Jorge Dominguez, Isabel Morales, Juan Del Castillo, Andrea Mattiozzi, Franco Simini
Summary: This study provides normative values for torque, velocity, and power involving hamstring muscles opposing elastic bands. The study found that peak isometric torque in hip extension with agonists is significantly higher than without them, while peak angular limb velocity is smaller with agonists. The combination of peak torque and peak velocity estimates power showed no significant difference.
APPLIED SCIENCES-BASEL
(2021)
Article
Sport Sciences
Aurelie Boyer, Francois Hug, Simon Avrillon, Lilian Lacourpaille
Summary: This study aimed to compare the distribution of muscle activation among the semimembranosus, semitendinosus, and biceps femoris during different exercises. Individual variations in the most active muscle were observed, with stiff-leg Deadlift favoring semimembranosus and Nordic hamstring exercise favoring semitendinosus. The contribution of biceps femoris activation varied between individuals and was correlated between the two exercises.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Multidisciplinary Sciences
Ricardo Pimenta, Tomas Lopes, Jose Pedro Correia, Antonio Prieto Veloso
Summary: This study aimed to investigate the acute effects of a maximum repeated sprint protocol on hamstring shear modulus and knee flexor neuromuscular parameters. The results showed significant decreases in average speed, peak torque, and rate of torque development, as well as an increase in the shear modulus of the biceps femoris long head after the sprint task. These findings provide evidence on the impact of repeated sprinting on muscle performance and activation.
SCIENTIFIC REPORTS
(2023)
Article
Sport Sciences
Valentin Goreau, Robin Pigne, Nathan Bernier, Antoine Nordez, Francois Hug, Lilian Lacourpaille
Summary: Individual activation strategies during hamstring strengthening exercises have not been thoroughly explored for their consequences on muscle damage distribution. This study found a significant correlation between the distribution of activation and the distribution of damage in the hamstring muscle heads during maximal eccentric contractions.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2022)
Article
Chemistry, Analytical
Yaojung Shiao, Thang Hoang
Summary: This paper presents a method to observe and evaluate muscle extension conditions using electromyography (EMG) and inertial measurement unit (IMU) sensors. The study successfully sensed a user's muscle conditions during exercise in a leg extension machine and provided proof of concept for using EMG signals to sense muscle fatigue. These results can be applied to other smart exercise machines in the future.
Article
Sport Sciences
Sonay Guruhan, Nihan Kafa, Zeynep B. Ecemis, Nevin A. Guzel
Summary: This study suggests that the Nordic hamstring exercise (NHE) may be the most effective exercise for hamstring muscles in healthy individuals, leading to higher muscle activation than other exercises. On the other hand, stiff-leg deadlift (SLDL), unilateral stiff-leg deadlift (USLDL), and ball leg curl (BLC) exercises may be preferred at the beginning of strength training programs due to their lower muscular activation compared to the NHE.
SPORTS HEALTH-A MULTIDISCIPLINARY APPROACH
(2021)
Article
Biology
Filip Kukic, Vladimir Mrdakovic, Aleksandar Stankovic, Dusko Ilic
Summary: This study investigated the effects of knee joint angle on muscle activation, exerted torque, and whether the knee angle affects the muscle activation-torque ratio. The results showed that knee joint angle had an effect on torque, while muscle activation remained unaffected. Significant effects were not observed in the muscle activation-torque ratio for lateral and medial quadriceps heads. The investigated range of knee joint angles seems to provide optimal conditions for maximal muscle activation but not for torque output, ligament loading, and joint contact forces. Clinicians and sports coaches should carefully consider training goals and choose knee joint angles accordingly.
Article
Rehabilitation
Gillian L. Hatfield, Kerry E. Costello, Janie L. Astephen Wilson, William D. Stanish, Cheryl L. Hubley-Kozey
Summary: The study found that muscle activation patterns and strength significantly influenced the differences in knee joint moments, particularly in knee flexion moments. This suggests that exercises focusing on appropriate muscle activation patterns and strengthening have the potential to modify dynamic loading gait patterns associated with knee OA clinical progression.
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION
(2021)
Article
Multidisciplinary Sciences
Byung Woo Cho, Hyuck Min Kwon, Koo Yeon Lee, Kwan Kyu Park, Ick Hwan Yang, Woo-Suk Lee
Summary: This study revealed that the bilateral popliteal angle (BPA) plays a significant role in determining the intraoperative extension gap (EG) for patients undergoing the same degree of bone resection. Smaller BPAs were associated with larger EG in osteoarthritis patients, making it a predictable factor for EG in TKA surgeries.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Chonnanid Limsakul, Kiattisak Sengchuai, Rakkrit Duangsoithong, Nattha Jindapetch, Jermphiphut Jaruenpunyasak
Summary: This study assessed the reliability of electromyography and range of motion measurements obtained using a knee exercise monitoring system. The results showed moderate to excellent inter- and intra-rater agreement for electromyography, but a small agreement bias for range of motion measurements.
Article
Engineering, Biomedical
Pingyue Li, Changzhao Li, Cong Wang, Willem A. Kernkamp, Chich-Haung Yang, Hai Hu, Tsung-Yuan Tsai
Summary: A rehabilitation program after anterior cruciate ligament reconstruction surgery is crucial for a satisfactory prognosis. The debate over using closed kinetic chain or open kinetic chain exercises for rehabilitation continues. This study compared the in vivo tibiofemoral kinematics during closed kinetic chain and open kinetic chain exercises and found valuable insights that can optimize rehabilitation plans for patients post-ACL reconstruction.
MEDICAL ENGINEERING & PHYSICS
(2022)
Article
Biology
Alberto Mendez-Villanueva, Francisco Javier Nunez, Jose Luis Lazaro-Ramirez, Pablo Rodriguez-Sanchez, Marc Guitart, Gil Rodas, Imanol Martin-Garetxana, Josean Lekue, Valter Di Salvo, Luis Suarez-Arrones
Summary: This study found that players with a prior hamstring strain injury may have differences in eccentric knee flexor strength, hamstring muscle volume, and sprinting performance compared to previously uninjured players. These findings have implications for developing secondary hamstring muscle injury prevention strategies.
Article
Sport Sciences
Toshiaki Soga, Daichi Nishiumi, Atsuya Furusho, Kei Akiyama, Norikazu Hirose
Summary: The study aimed to investigate whether an increased lower leg slope angle in the Nordic hamstring exercise (NHE) would enhance hamstring electromyography (EMG) activity in the final phase of the descend. Results showed that increasing the lower leg slope angle shifted the break point angle (BPA) to a lower knee flexion angle and increased hamstring EMG activity.
JOURNAL OF SPORTS SCIENCE AND MEDICINE
(2021)
Article
Orthopedics
Takanari Kubo, Daisuke Uritani, Shinya Ogaya, Shunsuke Kita, Takahiko Fukumoto, Tadashi Fujii, Yusuke Inagaki, Yasuhito Tanaka, Hidetaka Imagita
Summary: The study found a correlation between medial first peak tibiofemoral CF and SAI, indicating that individuals with knee OA and flatfoot have excessive first medial tibiofemoral CF during walking.
BMC MUSCULOSKELETAL DISORDERS
(2022)
Article
Health Care Sciences & Services
Paula Manuela Mendes Moleirinho-Alves, Pedro Miguel Teixeira Cravas Cebola, Paulo Duarte Guia dos Santos, Jose Pedro Correia, Catarina Godinho, Raul Alexandre Nunes da Silva Oliveira, Pedro Luis Cemacelha Pezarat-Correia
Summary: The study found that a combination of therapeutic and aerobic exercise programs had a significant improvement in masticatory muscle pain and bite force in patients with TMD. It is suggested that interventions to reduce pain in TMD patients should be multimodal and consider different types of exercises.
JOURNAL OF PERSONALIZED MEDICINE
(2021)
Article
Sport Sciences
S. Contemori, A. Biscarini
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2018)
Article
Engineering, Mechanical
Andrea Biscarini, Samuele Contemori
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART P-JOURNAL OF SPORTS ENGINEERING AND TECHNOLOGY
(2018)
Article
Rehabilitation
Samuele Contemori, Andrea Biscarini
JOURNAL OF SPORT REHABILITATION
(2019)
Article
Rehabilitation
Andrea Biscarini, Samuele Contemori, Giuditta Grolla
JOURNAL OF SPORT REHABILITATION
(2019)
Article
Behavioral Sciences
Cristina V. Dieni, Jacqueline A. Sullivan, Mario Faralli, Samuele Contemori, Andrea Biscarini, Vito E. Pettorossi, Roberto Panichi
NEUROBIOLOGY OF LEARNING AND MEMORY
(2018)
Article
Neurosciences
Samuele Contemori, Roberto Panichi, Andrea Biscarini
HUMAN MOVEMENT SCIENCE
(2019)
Article
Physiology
Samuele Contemori, Cristina V. Dieni, Jacqueline A. Sullivan, Aldo Ferraresi, Chiara Occhigrossi, Francesco Calabrese, Vito E. Pettorossi, Andrea Biscarini, Roberto Panichi
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2020)
Review
Biochemistry & Molecular Biology
Cristina V. Dieni, Samuele Contemori, Andrea Biscarini, Roberto Panichi
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Chemistry, Multidisciplinary
Andrea Biscarini, Samuele Contemori, Cristina V. Dieni, Roberto Panichi
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Mechanical
Andrea Biscarini, Andrea Calandra, Samuele Contemori
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART P-JOURNAL OF SPORTS ENGINEERING AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Andrea Biscarini
Summary: The author has derived closed-form dynamic equations for a planar musculoskeletal chain composed of a generic number n of rigid links connected by ideal revolute joints, considering different alignments among center of mass, centers of rotation, muscle forces, and external resistances. By quantifying the unique contribution of each kinematic and kinetic variable, joint torques and reaction forces have been determined analytically for each joint in the chain. The analytical results can be applied to multilink musculoskeletal chains with various muscle configurations.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Andrea Biscarini, Cristina Dieni, Raffaele Losavio, Roberto Panichi, Samuele Contemori
Summary: This study analyzed the muscle contribution to the static body-weight wall-squat exercise and found that shifting the center of pressure from the forefoot to the rearfoot increased the activity of the vastus medialis, vastus lateralis, and tibialis anterior. Maximizing lumbar muscle activity was achieved by shifting the center of pressure at the forefoot, placing the center of pressure exerted by the wall on the back at the scapular zone, and keeping the feet far from the wall. This exercise is suitable for patients with low back pain and limited lumbar muscle endurance, or quadriceps weakness and inhibition secondary to a knee injury.
APPLIED SCIENCES-BASEL
(2022)
Article
Biotechnology & Applied Microbiology
Andrea Biscarini
Summary: This study presents a dynamic model for a two-link musculoskeletal chain controlled by different muscles. The model allows analytical expression of the joint reaction forces and chain endpoint force, based on muscle forces/torques, chain configuration, and link angular velocities/accelerations. The findings from numerical simulation reveal that angular acceleration of shoulder flexion and elbow extension at different phases of the movement influence the direction of the endpoint force. Forearm angular velocity and acceleration also impact the axial and shear components of the shoulder reaction force, depending on the chain configuration. The information obtained can be beneficial for optimizing performance and controlling joint loads in ballistic sports and resistance exercises.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Multidisciplinary
Andrea Biscarini
Summary: This passage discusses the processing of physiological parameters and their derivatives by the sensorimotor system, showcasing the use of U-expansion for fast prediction strategies. By employing this expansion method, it may offer an analytical background for the development of algorithms designed for the fast and accurate feedback control of nonlinear systems.
Article
Neurosciences
Samuele Contemori, Roberto Panichi, Andrea Biscarini
Summary: The study found that the contraction timings of the middle deltoid and upper trapezius match across different scapular positions, while the timings of the middle and lower fibers of the trapezius change with the scapular position. These results may reflect different central strategies for coordinating the automatic sequences of contraction of the scapulothoracic muscles, suggesting a flexible and adaptable predisposition of the motor control system in exploring alternative solutions to meet functional movement needs.
JOURNAL OF MOTOR BEHAVIOR
(2021)