Article
Sport Sciences
Gregory S. Walsh, Isabel Harrison
Summary: Wearing backpack or webbing loads affects gait stability and muscle activation signals during walking, with loaded and uphill conditions leading to decreased stability and increased muscle activations. However, there were no significant differences observed between the two load carriage systems in this study.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Jose E. Rubio, Junfei Tong, Aravind Sundaramurthy, Adhitya V. Subramani, Vivek Bhaskar Kote, Michael Baggaley, W. Brent Edwards, Jaques Reifman
Summary: During U.S. Army basic combat training, women are more prone to lower-extremity musculoskeletal injuries, including stress fracture of the tibia, with higher injury rates compared to men. This is partly due to sex-specific differences in running biomechanics, particularly when running with external load. A study found that women have a greater risk of tibial stress fracture compared to men as load increases, indicating their higher susceptibility to injuries. These findings support the need for more personalized training and testing that takes into account sex and individual differences.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Robotics
Jiyuan Wu, Yuxuan Zhang, Yinglong Zhang, Minxu Yan, Xingsong Wang
Summary: In this study, a method inspired by the running posture of ungulate species was proposed to reduce metabolic energy by controlling load motion. An energy-saving exoskeleton with an active load CoM adjustment system was developed using active disturbance rejection control (ADRC) technology. Experimental results demonstrated the effectiveness of the energy-saving exoskeleton with significant reductions in EMG signals and net metabolic rate.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Neurosciences
Jordan T. Sturdy, Hedaya N. Rizeq, Amy Sider, Pinata H. Sessoms, Anne K. Silverman
Summary: This study examined the effects of sloped walking and carrying a heavy backpack on posture and muscle activations. The results showed that walking on slopes increased muscle activity in the back and abdomen, while carrying a backpack reduced muscle activity. Additionally, different backpack configurations had different effects on muscle activity.
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
(2023)
Article
Biophysics
Maja Gorsic, Vesna D. Novak
Summary: This paper presents a low-cost upper-body exoskeleton, the Auxivo CarrySuit, which was found to effectively reduce muscle load on the shoulders and chest, decrease heart rate and perceived exertion, and shift discomfort from the upper body to the legs. However, longer-term evaluations with actual workers are still needed to determine practical benefits.
JOURNAL OF BIOMECHANICS
(2023)
Article
Sport Sciences
Jason M. Keeler, Michael B. Pohl, Haley C. Bergstrom, Justin M. Thomas, Mark G. Abel
Summary: This study examined the effects of tactical gear on muscle activation in SWAT officers during different tasks. The results showed that the addition of gear slightly increased the activation of the erector spinae muscle, but had no significant effect on other muscles. The shield walk task resulted in the highest muscle activation levels. Dynamic tasks elicited higher muscle activation levels compared to static tasks.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Automation & Control Systems
Lianxin Yang, Caihua Xiong, Ming Hao, Yuquan Leng, Ken Chen, Chenglong Fu
Summary: This study explores the impact of actively suspended backpack on human energy response, finding that applying upward impulse and inputting energy during the double-support phase can reduce human energy cost, while outputting energy can generate electricity with high efficiency.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Automation & Control Systems
Lianxin Yang, Caihua Xiong, Ming Hao, Yuquan Leng, Ken Chen, Chenglong Fu
Summary: The study aims to investigate human response to different patterns of relative load movement, providing guidance for controlling the actively suspended backpack.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Engineering, Industrial
J. Heredia-Jimenez, E. Orantes-Gonzalez
Summary: This study compares the metabolic energy cost and physiological adaptations of carrying a suspended backpack versus a traditional backpack during exercise. The results show that using a suspended backpack resulted in advantages in oxygen consumption, muscle oxygen saturation, and performance compared to a traditional backpack.
Article
Engineering, Biomedical
Gwendolyn M. Bryan, Patrick W. Franks, Seungmoon Song, Ricardo Reyes, Meghan P. O'Donovan, Karen N. Gregorczyk, Steven H. Collins
Summary: Whole-leg exoskeleton assistance can reduce the metabolic cost of walking while carrying various loads. Consistent optimized timing parameters across participants and load conditions suggest sensitivity of metabolic cost reductions to torque timing, while varied torque magnitude parameters may imply customization based on individuals. Future work should explore whether applying the load to the exoskeleton instead of the person's torso yields greater benefits.
JOURNAL OF NEUROENGINEERING AND REHABILITATION
(2021)
Article
Multidisciplinary Sciences
Yunzhong Shi, Zhiyu Wang, Mingde He, Ke Zhu, Naijie Wang
Summary: This study assesses the fracture behavior of load-carrying fillet welded joints in Tee configurations, focusing on stress intensity factors related to crack opening and sliding/shear fractures. It is found that fillet angle and plate thickness have significant effects on SIFs, especially as the crack propagates at the weld root and inside the fillet weld.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Industrial
Yi-Lang Chen, Hong-Tam Nguyen, Yi Chen
Summary: The study found that carrying modes and weights significantly affect body posture and muscle activation. Side backpack carrying should be avoided, and it is recommended to carry loads at 10% of body weight when using a 2-strap backpack.
INTERNATIONAL JOURNAL OF INDUSTRIAL ERGONOMICS
(2021)
Article
Engineering, Industrial
Donghyun Song, Eunjee Kim, Haerim Bak, Gwanseob Shin
Summary: The study found that shoulder flexor and extensor muscles were more associated with horizontal load, while elbow flexors were more sensitive to vertical load. These findings provide important insights for ergonomic design and evaluation of hand tools or occupational tasks.
APPLIED ERGONOMICS
(2021)
Article
Engineering, Industrial
Aitor Pinedo-Jauregi, Tyler Quinn, Aitor Coca, Gaizka Mejuto, Jesus Camara
Summary: This study investigated the interactive physiological effect of backpack load carriage and slope during walking in professional mountain rescuers. The results showed that both slope and load had significant effects on relative heart rate, relative oxygen consumption, and rating of perceived exertion. The burden increased directly with slope and load, and there was also an additive effect of slope and load interaction. Therefore, mountain rescuers should consider the physiological interaction between slope and load when determining safe occupational walking capacity.
APPLIED ERGONOMICS
(2022)
Article
Engineering, Industrial
Jordan T. Sturdy, Pinata H. Sessoms, Anne K. Silverman
Summary: Military service members often suffer from musculoskeletal injuries of the lumbar spine due to heavy backpack loads. Backpack design influences joint contact forces, but the contact forces were similar between different backpack configurations. Future studies should involve more participants, consider different walking conditions, and analyze various backpack load distributions to further improve backpack design.
APPLIED ERGONOMICS
(2021)
Article
Sport Sciences
Stuart M. McGill, Edward D. J. Cambridge, Jordan T. Andersen
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2015)
Article
Sport Sciences
Jordan T. Andersen, Ross H. Sanders
JOURNAL OF SPORTS SCIENCES
(2018)
Article
Sport Sciences
Stuart McGill, Jordan Andersen, Jordan Cannon
JOURNAL OF SPORTS SCIENCES
(2015)
Article
Sport Sciences
Jordan T. Andersen, Peter J. Sinclair, Carla B. McCabe, Ross H. Sanders
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2020)
Article
Sport Sciences
Christopher Papic, Ross H. Sanders, Roozbeh Naemi, Marc Elipot, Jordan Andersen
Summary: This study compared the speed, accuracy, and reliability of 2D body landmark digitization using a neural network with manual digitization in the glide phase of swimming. The neural network digitized body landmarks 233 times faster than manual digitization, with a root-mean-square-error of around 4-5 mm, showing high accuracy and reliability. Results demonstrated strong agreement and correlation between body position and glide variable data obtained from the two methods.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Engineering, Biomedical
Jesus J. Ruiz-Navarro, Marta Cano-Adamuz, Jordan T. Andersen, Francisco Cuenca-Fernandez, Gracia Lopez-Contreras, Jos Vanrenterghem, Raul Arellano
Summary: Swimming performance heavily relies on the underwater phase, with young swimmers benefiting greatly from technique development. A training protocol can significantly improve UUS and underwater gliding performance, potentially reducing swimmers' hydrodynamic drag. Kinematic variables highlighted in the study can help quantify changes in UUS and gliding performance.
SPORTS BIOMECHANICS
(2021)
Article
Engineering, Biomedical
Christopher Papic, Jordan Andersen, Roozbeh Naemi, Ryan Hodierne, Ross H. Sanders
Summary: The study evaluated the effect of a feedback intervention on glide performance and torso morphology in swimmers, which significantly improved glide efficiency and performance through self-modelling visual feedback and verbal cuing, particularly by reducing lumbar lordosis and chest convexity.
SPORTS BIOMECHANICS
(2021)
Article
Neurosciences
Lionel Chia, Jordan T. Andersen, Marnee J. McKay, Justin Sullivan, Tomas Megalaa, Evangelos Pappas
Summary: The study found that the validity of IMU system varies in different tasks, joints, and planes. The IMU system is recommended for estimating knee sagittal-plane ROM during cutting, trunk sagittal-plane peak angle during the double-leg landing task, trunk sagittal-plane ROM for almost all tasks, and trunk frontal-plane peak angle for the right single-leg landing task with good-to-excellent correlation and reasonable accuracy.
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
(2021)
Article
Sport Sciences
Kerry Peek, Jordan Andersen, Marnee J. McKay, Theo Versteegh, Ian A. Gilchrist, Tim Meyer, Andrew Gardner
Summary: This pilot trial found that a neck exercise programme can increase neck strength and reduce head impact magnitude during heading in adolescent football players. Female players showed more significant reduction in peak angular velocity compared to male players.
Article
Engineering, Industrial
Ayden McCarthy, Jodie A. Wills, Jordan Andersen, Gavin K. Lenton, Tim L. A. Doyle
Summary: The HumanTrak is a tool that captures human movement through markerless motion tracking and plays a crucial role in military physical screening. The study found good to excellent reliability for shoulder and hip range of motion (ROM) measurements and dynamic tasks. However, reliability varied for different movements and body armour conditions. Further research is needed to investigate movements across different planes.
Article
Engineering, Biomedical
Jesus J. Ruiz-Navarro, Jordan T. Andersen, Francisco Cuenca-Fernandez, Gracia Lopez-Contreras, Pedro G. Morouco, Raul Arellano
Summary: This study examined the relationship between the ability to apply force in the water and free swimming performance. The results showed that the relative change in force could be used to quantify this ability and it was negatively correlated with free swimming speeds.
SPORTS BIOMECHANICS
(2022)
Article
Sport Sciences
Timothy B. Davies, Jordan T. Andersen, Mark Halaki, Rhonda Orr, Daniel A. Hackett
Summary: Comparing the effects of higher-volume cluster training and lower-volume traditional training on muscle performance, the study found no significant differences between the two training structures in terms of muscle strength and performance, but there were some trends in certain measures.
JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
(2022)
Article
Engineering, Biomedical
AuraLea Fain, Benjamin Hindle, Jordan Andersen, Bradley C. Nindl, Matthew B. Bird, Joel T. Fuller, Jodie A. Wills, Tim L. A. Doyle
Summary: This study aimed to validate a 7-sensor inertial measurement unit system against optical motion capture to estimate bilateral lower-limb kinematics. The results showed moderate to good agreement in peak angles and range of motion for various joints during the two exercises. However, peak flexion angles had poor agreement. Future work will focus on optimizing methodologies and expanding the planes of movement to improve usability and confidence in data interpretation.
JOURNAL OF APPLIED BIOMECHANICS
(2023)
Article
Biophysics
J. T. Andersen, A. M. McCarthy, J. A. Wills, J. T. Fuller, G. K. Lenton, T. L. A. Doyle
Summary: Markerless motion capture has improved screening efficiency in sports and occupations, but the reliability of kinematic measurements from commercial systems must be established. This study evaluated the reliability of HumanTrak, a markerless motion capture system, for estimating peak trunk flexion in squat movements with and without a weighted vest. The results showed that HumanTrak had good to excellent reliability and can detect differences in trunk flexion when screening squat movements, regardless of whether a weighted vest is worn.
JOURNAL OF BIOMECHANICS
(2023)
Article
Sport Sciences
Kerry Peek, Marnee McKay, Allan Fu, Tim Meyer, Vincent Oxenham, Carrie Esopenko, Jaclyn Caccese, Jordan Andersen
Summary: This cross-sectional study explored the effects of different ball types and characteristics on head acceleration during purposeful heading in youth football players. The results showed that ball characteristics, such as pressure, size, and mass, significantly influenced head acceleration during heading, with lighter and smaller balls resulting in lower head accelerations. Changing ball characteristics could be an effective strategy to reduce head acceleration during heading in youth football training.
SCIENCE AND MEDICINE IN FOOTBALL
(2021)
