Slips are the leading cause of falls, and understanding slip biomechanics is crucial for preventing falls and mitigating their negative consequences. This study analyses human biomechanical responses to slips, including kinetic, kinematic, spatiotemporal, and EMG variables. We reviewed 41 studies investigating slip-induced falls in lab settings, computational models, and training approaches. Our analysis focused on reactions and effects of factors like age, fatigue, strength, perturbation intensity, and gait speed. Trailing limbs' hip extension and knee flexion interrupt the swing phase earlier, increasing the support base. The slipping leg responds with two phases: hip extension and knee flexion, then hip flexion and knee extension. Furthermore, our analysis revealed that the medial hamstring muscles play an active role in slip recoveries. Their activation in the slipping limb allows for hip extension and knee flexion, while in the trailing limb, their activation results in the foot touching down. Additionally, successful slip recoveries were associated with co-contraction of the Tibialis Anterior (TA) and Medial Gastrocnemius (MG), which increases ankle joint stability and facilitates foot contact with the ground. Our review identifies various factors that influence biomechanical and muscular responses to slips, including age, perturbation intensity, gait speed, muscular fatigue, and muscular strength. These findings have important implications for designing interventions to prevent slip-related falls, including cutting-edge technology devices based on a deeper understanding of slip recoveries. Future research should explore the complex interplay between biomechanics, muscle activation patterns, and environmental factors to improve slip-fall prevention strategies.
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http://dx.doi.org/10.1016/j.jbiomech.2024.112235 | DOI Listing |
Medicine (Baltimore)
December 2024
Department of Occupational Therapy, School of Health Sciences, Fukushima Medical University, Fukushima-city, Fukushima, Japan.
This study aimed to determine if the vitality index predicts walking independence in inpatients with hip fractures and calculate a cutoff value. This retrospective cohort study included inpatients with hip fracture (N = 133). Logistic regression analysis was performed with walking independence at discharge and vitality index as the dependent and independent variables, respectively, and age, Berg balance scale (BBS), knee extension muscle strength, and revised Hasegawa's dementia scale at admission as covariates.
View Article and Find Full Text PDFJ Neurophysiol
December 2024
Department Artificial Intelligence in Biomedical Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91052 Erlangen, Germany.
For individuals with motor complete spinal cord injury (SCI), previous works have shown that spared motor neurons below the injury level can still be voluntarily controlled. In this study, we investigated the behavior of these neurons after SCI by analyzing neural and spatial properties of individual motor units using high-density surface electromyography (HDsEMG) and ultrasound imaging. The dataset for this study is based on motor unit data from our previous work (Oliveira .
View Article and Find Full Text PDFJ Sports Sci
December 2024
Department of Sports Science and Physical Education, Nord University, Levanger, Norway.
This study compared the effects of 90° versus 40° hip flexion in the leg extension exercise on quadriceps femoris muscle hypertrophy. Twenty-two untrained men completed a ten-week intervention comprising two resistance training sessions per week. A within-participant design was used, with the lower limb side randomly allocated to the 40 or 90° condition.
View Article and Find Full Text PDFRadiol Case Rep
February 2025
Department of Radiodiagnosis, Srm Medical College Hospital and Research Centre, Srm Nagar, Potheri, Chengalpattu, Tamil Nadu 603203, India.
In the setting of trauma, occurrence of intracapsular lipo-hemarthrosis is not uncommon, highly useful and well known imaging finding. Occurrence of extracapsular lipohaemarthrosis is uncommon and have been noticed around the large joints like knee, hip, and shoulder joints. Extracapsular lipohaemarthrosis is rare especially around small joints like wrist joint.
View Article and Find Full Text PDFSkelet Muscle
December 2024
Laboratory of Exercise and Health, ETH Zurich, Schwerzenbach, Switzerland.
Background: Hip osteoarthritis patients display higher levels of fatty infiltration (FI) in the gluteus minimus (GM) compared to other hip muscles. We investigated specific histological factors such as fiber type composition and collagen deposition, and functional outcomes like muscle strength and activation associated with FI in these patients.
Methods: In twelve men (67 ± 6 y) undergoing total hip replacement (THR), hip and knee muscle strength and activation (electromyography, EMG) were assessed bilaterally.
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