Article
Physiology
Kirstie Jodie Turner, David Bruce Pyne, Julien D. Periard, Anthony John Rice
Summary: This study examined the effects of two different high-intensity training methods on the performance of national-level rowers, finding that 8 sessions of high-intensity training can significantly improve 2,000 m rowing ergometer performance, with a further 8 sessions producing minimal additional improvement. The method of high-intensity training appears to be less important than the dose.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Multidisciplinary Sciences
Arturo Casado, Jose Luis Tuimil, Xavier Iglesias, Miguel Fernandez-del-Olmo, Pedro Jimenez-Reyes, Rafael Martin-Acero, Ferran A. Rodriguez
Summary: This study compares the VO2max, MAS, and spatiotemporal parameters between sub-elite middle- and long-distance runners and endurance non-runners. The findings show that middle- and long-distance runners achieve a faster MAS compared to non-running endurance athletes, despite having similar VO2max. This could be attributed to a greater mechanical efficiency and the ability to modify stride length to achieve faster speeds.
Article
Pediatrics
Charlotte Wenzel, Bart Chateau Bongers, Marit Lea Schlagheck, Daniela Reis, Franziska Reinhard, Peter Schmidt, Stefan Bernitzki, Max Oberste, Heidrun Lioba Wunram, Philipp Zimmer, Oliver Fricke
Summary: Endurance training has been proven effective in treating adolescents with major depressive disorder. This study examined the exhaustion criteria during a cardiopulmonary exercise test (CPET) for adolescents with MDD, and compared the values with control values. The results showed that fewer adolescents with MDD achieved the exhaustion criteria and had significantly lower cardiorespiratory fitness compared to the control group.
EUROPEAN JOURNAL OF PEDIATRICS
(2023)
Article
Physiology
Stefanos Volianitis, Peter Rasmussen, Nicolas C. Petersen, Niels H. Secher
Summary: This study evaluates the effect of hyperoxia on cerebral oxygenation and neuromuscular fatigue mechanisms of the elbow flexor muscles following ergometer rowing. The results indicate that hyperoxia can increase cerebral oxygenation and attenuate muscle fatigue after rowing, suggesting that this effect is peripheral rather than centrally mediated.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Sport Sciences
Jon E. Goodwin, Anthony M. J. Bull
Summary: The study examined the reliability, joint angle sensitivity, muscle recruitment, and concurrent validity of a force plate-based isometric hip extensor test. The results showed that the test is repeatable, sensitive to joint position, and can assess different functional output.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Sport Sciences
Qingshan Zhang, Felicie Pommerell, Adam Owen, Robin Trama, Cyril Martin, Christophe A. Hautier
Summary: The study compared sprint running force-velocity profiles between aerial and terrestrial runners, finding that terrestrial runners showed more efficient force production in the forward direction, while aerial runners were more effective in maintaining net horizontal force production with increasing speed.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2021)
Article
Physiology
Kurt Jensen, Morten Frydkjaer, Niels M. B. Jensen, Lucas M. Bannerholt, Soren Gam
Summary: The study found a high correlation between maximal power output (MPO) and average power (W-2k) with maximal oxygen uptake ((V)over dotO(2)max), leading to regression equations for predicting (V)over dotO(2)max. The prediction model including MPO or W-2k explains 88% to 90% of the variability in (V)over dotO(2)max and is recommended for practical use in male club rowers.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2021)
Article
Physiology
Oscar B. Mazza, Soren Gam, Mikkel E. I. Kolind, Christian Kiaer, Christina Donstrup, Kurt Jensen
Summary: This study examined the relationship between MPO in an individualized 7 x 2-minute incremental test and VO2max in female rowers and developed a regression equation to predict VO2max from MPO. The results showed a high correlation coefficient between MPO and VO2max, and a prediction equation was established. The prediction model, including only MPO determined during the INCR-test, explained 89% of the variability in VO2max.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Rehabilitation
Frida Bjorkman, Orjan Ekblom, Elin Ekblom-Bak, Tony Bohman
Summary: The study aimed to assess the ability of a submaximal cycling test to detect longitudinal changes in maximal oxygen uptake (VO(2)max) over a 5-8 year period. Results showed that while there was no significant overall change in mean measured VO(2)max, individual variations were observed. The correlation between changes in measured and estimated VO(2)max was significant, indicating a potential use of the test in monitoring VO(2)max changes over time.
BMC SPORTS SCIENCE MEDICINE AND REHABILITATION
(2021)
Article
Engineering, Biomedical
Takuto Toriumi, Ahram Kim, Shoichi Komine, Ikuru Miura, Suminori Nagayama, Hajime Ohmori, Yukio Nagasaki
Summary: The study demonstrates that the nanoparticle antioxidant RNP can significantly improve exercise performance in rats, increasing their all-out running time, while the use of low molecular weight antioxidants reduces running time and leads to a decrease in red blood cell count and an increase in oxidative stress.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Psychology, Multidisciplinary
Tiago Cetolin, Anderson Santiago Teixeira, Juliano Fernandes da Silva, Alessandro Haupenthal, Fabio Yuzo Nakamura, Carlo Castagna, Luiz Guilherme Antonacci Guglielmo
Summary: This study demonstrated that performing a high-intensity intermittent exercise (HIIE) session on sand surface results in higher physiological stress compared to HIIE on grass surface, as evidenced by increased oxygen uptake, heart rate, rating of perceived exertion, and blood lactate concentration.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Health Care Sciences & Services
Abdalla Alrashdan, Atef M. Ghaleb, Malek Almobarek
Summary: The study aims to provide handgrip strength reference values for Saudi males and females, comparing them with international standards, and investigating the effects of gender, age group, hand area, and body mass index on grip strength. Data collected from 297 volunteers show a curvilinear relationship between grip strength and age, significant differences between genders, hand area, and some age groups, as well as correlations to hand dimensions depending on gender.
Article
Multidisciplinary Sciences
Pehzaan Sarfabadi, Moattar Raza Rizvi, Ankita Sharma, Waqas Sami, Mirza Rizwan Sajid, Sumit Arora, Akshay Anand, Mohd Rashid bin Ab Hamid
Summary: This study aimed to evaluate the effects of low-intensity blood flow restriction (BFR) training and high-intensity resistance training (HI-RT) on the leaping performance of longjumpers. The results showed that the combined effects of low-intensity BFR training and HI-RT were effective in improving the muscle strength and power of lower limbs in long jumpers. The group receiving combined BFR training plus HI-RT showed significant improvements in 1-RM, IKDQR, IKDHR, and IKDQL.
Review
Sport Sciences
Thibault Besson, Robin Macchi, Jeremy Rossi, Cedric Y. M. Morio, Yoko Kunimasa, Caroline Nicol, Fabrice Vercruyssen, Guillaume Y. Millet
Summary: In recent years, there has been an increase in female participation in endurance running. This review discusses the sex differences in running biomechanics, economy, substrate utilization, muscle tissue characteristics, neuromuscular fatigue, thermoregulation, and pacing strategies. While females may have advantages in certain aspects, there are also factors that counterbalance these potential advantages.
Article
Sport Sciences
Gaku Kakehata, Yuta Goto, Shigeo Iso, Kazuyuki Kanosue
Summary: The study found that higher step frequency is correlated with smoother switching of agonist-antagonist muscle activities and earlier activation of the rectus femoris relative to the biceps femoris. To improve sprint performance, athletes and coaches should consider coordination of muscle activities in both legs, not just focusing on muscle activities in one leg.
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2021)
Article
Sport Sciences
Hans C. von Lieres Und Wilkau, Neil E. Bezodis, Jean-Benoit Morin, Gareth Irwin, Scott Simpson, Ian N. Bezodis
JOURNAL OF SPORTS SCIENCES
(2020)
Article
Engineering, Biomedical
Damian J. Harper, Jean-Benoit Morin, Christopher Carling, John Kiely
Summary: This study investigated the reliability and sensitivity of kinematic and kinetic variables obtained from a maximal horizontal deceleration test using radar technology. The results showed that these variables had good reliability and were sensitive to detect changes in performance. This test protocol can provide new insights into an individual's maximal horizontal deceleration capabilities.
SPORTS BIOMECHANICS
(2023)
Article
Engineering, Biomedical
Nicklas Junge, Jean-Benoit Morin, Lars Nybo
Summary: Ballistic actions are crucial for generating power in sports where performance depends on contraction and movement velocities. Force-velocity-power profiling provides information about neuromuscular capabilities and vertical performance but is not well-studied in relation to horizontal movements. This study analyzed the associations between (FvP) over bar profiling and uni- and multidirectional ballistic performance tasks in high-level athletes.
SPORTS BIOMECHANICS
(2023)
Article
Engineering, Biomedical
Olivier Girard, Sebastien Racinais, Anthony Couderc, Jean-Benoit Morin, Joong Hyun Ryu, Julien Piscione, Franck Brocherie
Summary: This study describes the asymmetry in main running mechanical variables during repeated treadmill sprints in elite female athletes and examines the influence of fatigue on inter-limb differences in sprinting mechanics. The results showed that there was no noticeable difference in asymmetries for the majority of stride mechanical variables during repeated treadmill sprints in elite female Rugby Sevens players.
SPORTS BIOMECHANICS
(2023)
Article
Physiology
Olivier Girard, Franck Brocherie, Jean-Benoit Morin, Gregoire P. Millet, Clint Hansen
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2020)
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
Sport Sciences
Nicklas Junge, Aske Lundsgaard, Mathias Foged Hansen, Pierre Samozino, Jean-Benoit Morin, Per Aagaard, Bret Contreras, Lars Nybo
Summary: While neuromuscular function plays a crucial role in athletic training, it is highly task-specific. This study found no significant association between hip thrust exercises and sprinting in terms of FVP profiling, indicating the importance of force orientation specificity.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Sport Sciences
Matt R. Cross, Jean Romain Riviere, Bas Van Hooren, Nicolas Coulmy, Pedro Jimenez-Reyes, Jean-Benoit Morin, Pierre Samozino
Summary: The study found that the countermovement can increase net propulsive force and improve performance during jumping. However, this effect varies between movement velocity, sport type, and athlete level, emphasizing the importance of individualized sports-specific assessment and training to reduce the countermovement effect at relevant velocities.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Biophysics
Neil Bezodis, Steffi Colyer, Ryu Nagahara, Helen Bayne, Ian Bezodis, Jean-Benoit Morin, Munenori Murata, Pierre Samozino
Summary: This study compared the effects of three calculation methods on two key technical ability measures, and found that Method B provides RF values which most closely approximate the mechanical reality of step averaged accelerations progressively approaching zero.
JOURNAL OF BIOMECHANICS
(2021)
Article
Sport Sciences
Jace A. Delaney, Benjamin A. McKay, Jim Radcliffe, Dean T. Benton, Pierre Samozino, Jean-Benoit Morin, Grant M. Duthie
Summary: The study found that the load-velocity relationship of hill sprinting was valid and reliable under different hill gradients, with velocity decreasing as slope increased. Hills with gradients up to 17.6% did not provide sufficient resistance for optimal power development.
JOURNAL OF SPORTS SCIENCES
(2022)
Editorial Material
Sport Sciences
Grant Abt, Simon Jobson, Jean-Benoit Morin, Louis Passfield, Jaime Sampaio, Caroline Sunderland, Craig Twist
JOURNAL OF SPORTS SCIENCES
(2022)
Article
Sport Sciences
Pierre Samozino, Nicolas Peyrot, Pascal Edouard, Ryu Nagahara, Pedro Jimenez-Reyes, Benedicte Vanwanseele, Jean-Benoit Morin
Summary: The study aimed to determine the respective influences of sprinting maximal power output (PHmax) and mechanical Force-velocity (F-v) profile on sprint acceleration performance. Findings suggest that sprint acceleration performance depends mainly on PHmax, but also on the F-v profile, with an individual optimal F-v profile existing for a given PHmax. This optimal profile depends on PHmax and sprint distance, with the balance between force production capacities at low and high velocities affecting performance.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2022)
Article
Physiology
Paul Glaise, Isabelle Rogowski, Pierre Samozino, Jean-Benoit Morin, Baptiste Morel, Cyril Martin
Summary: This study aimed to determine the relationships between force-production capacity in sprinting and opposition skill efficiency in rugby union games. The results showed that skill efficiency was strongly correlated with maximum propulsive power. Forwards' dueling, rucking, and tackling efficiency were mainly predicted by theoretical maximum force and maximum ratio of horizontal force. Backs' dueling and rucking efficiency were predicted by theoretical maximum force, while dueling and tackling efficiency were predicted by maximum ratio of horizontal force.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Sport Sciences
Jean Romain Riviere, Jean-Benoit Morin, Maximilien Bowen, Matt R. Cross, Laurent A. Messonnier, Pierre Samozino
Summary: This study compared linear and curvilinear models to describe the force-velocity relationship in lower-limb acyclic extensions, using experimental data on a wide range of velocity conditions. The results showed that although the curvilinear models better fit the data, the linear model is more suitable for describing the force-velocity relationship in lower-limb acyclic extensions.
SPORTS MEDICINE-OPEN
(2023)
Article
Sport Sciences
Jurdan Mendiguchia, Angel Gonzalez De la Flor, Alberto Mendez-Villanueva, Jean-Benoit Morin, Pascal Edouard, Mirian Aranzazu Garrues
Summary: The study showed that after a 6-week specific multimodal intervention, the intervention group exhibited a significant decrease in APT kinematics during gait, significant increase in Active Knee Extension Test, and a significant increase in trunk endurance for flexion, extension, and side bridge, compared to the control group.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Biophysics
Nathan D. Camarillo, Rafael Jimenez-Silva, Frances T. Sheehan
Summary: This article discusses the statistical dependence between multiple measurements from the same participant and provides recommendations for using these measurements when they are not independent.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
J. Huet, A. -S. Boureau, A. Sarcher, C. Cornu, A. Nordez
Summary: Standard compression in freehand 3D ultrasound induces a bias in volume calculations, but minimal compression and gel pad methods have similar results. With a trained examiner and precautions, the bias can be minimized and become acceptable in clinical applications.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
C. Lariviere, A. H. Eskandari, H. Mecheri, F. Ghezelbash, D. Gagnon, A. Shirazi-Adl
Summary: Recent developments in musculoskeletal modeling have focused on model customization. Personalization of the spine profile may affect estimates of spinal loading and stability. This study investigates the biomechanical consequences of changes in the spinal profile and finds that personalizing the spine profile has medium to large effects on trunk muscle forces and negligible to small effects on spinal loading and stability.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Luke T. Mattar, Arash B. Mahboobin, Adam J. Popchak, William J. Anderst, Volker Musahl, James J. Irrgang, Richard E. Debski
Summary: Exercise therapy fails in about 25.0% of cases for individuals with rotator cuff tears, and one reason for this failure may be the inability to strengthen and balance the muscle forces that keep the humeral head in the correct position. This study developed computational musculoskeletal models to compare the net muscle force before and after exercise therapy between successfully and unsuccessfully treated patients. The study found that unsuccessfully treated patients had less inferiorly oriented net muscle forces, which may increase the risk of impingement.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Natsuki Sado, Takeshi Edagawa, Toshihide Fujimori, Shogo Hashimoto, Yoshikazu Okamoto, Takahito Nakajima
Summary: The existing methods for predicting hip and lumbosacral joint centres in Japanese adults are biased and differ between sexes. We propose new regression equations that consider soft-tissue thickness, sex differences, and a height-directional measure, and validate them using leave-one-out cross-validation.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Peimin Yu, Xuanzhen Cen, Qichang Mei, Alan Wang, Yaodong Gu, Justin Fernandez
Summary: This study aimed to explore the intra-foot biomechanical differences among individuals with chronic ankle instability (CAI), copers, and healthy individuals during dynamic tasks. The study found that copers and CAI individuals had smaller dorsiflexion angles and copers presented a more eversion position compared to healthy participants. Copers also had greater dorsiflexion angles in the metatarsophalangeal joint and more inversion moments in the subtalar joint during certain tasks. These findings can help in designing interventions to restore ankle joint functions in CAI individuals.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Jon Skovgaard Jensen, Anders Holsgaard-Larsen, Anders Stengaard Sorensen, Per Aagaard, Jens Bojsen-Moller
Summary: This study investigates the biomechanical effects of robot-assisted body weight unloading (BWU) on gait patterns in healthy young adults. The results show that dynamic robot-assisted BWU enables reduced kinetic requirements without distorting biomechanically normal gait patterns during overground walking.
JOURNAL OF BIOMECHANICS
(2024)