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Rock climbing is a growing sport at both professional and recreational levels. Rock climbing requires specific hand positions with high force outputs to adapt to changing terrain requirements. The purpose of this study was to explore associations between years of climbing experience, the frequency of training, and skill level on force production in 2 different climbing-specific hand positions. A secondary purpose was to investigate sex differences in force output across climbing skill levels. Forty-nine participants ranging from Beginner to Expert skill participated. Maximum isometric pull force was tested in half-crimp and open-hand positions. Force output was larger in half-crimp versus open-hand positions. Higher skill, years of experience, and training frequency were all significantly correlated to greater force output in both hand positions. There were no force differences between males and females for Beginner/Intermediate and Advanced levels; however, males had higher force than females for Expert groups. These findings provide insight for athletes, coaches, and clinicians working with climbers regarding tissue adaptations specific to climbing grip. These findings have implications for climbing-specific training, expectations for force output, injury prevention, and reliance on hand force versus climbing technique for females climbing at high levels.
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http://dx.doi.org/10.1123/jab.2024-0056 | DOI Listing |
J Colloid Interface Sci
September 2025
Key Laboratory of Automobile Materials, Ministry of Education and School of Materials Science and Engineering, Jilin University, Changchun 130022, China. Electronic address:
Neither single electrolyte design nor solid electrolyte interface (SEI) engineering alone can effectively resolve the dual challenges of sluggish reaction kinetics and unstable interfaces in polymer-based lithium metal batteries (LMBs). Herein, a rational integrated design strategy is adopted to simultaneously fabricate poly(trifluoroethyl methacrylate-co-4-oxo-5,8,11-trioxa-3-azatridec-12-en-1-yl acrylate)-based gel polymer electrolyte (PTDA-GPE) and stable composite SEI during the thermal-induced in situ polymerization process. The resulting PTDA-GPE demonstrates superior Li transport kinetics (1.
View Article and Find Full Text PDFLangmuir
September 2025
Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
This study presents a novel photovoltaic triboelectric nanogenerator (PTENG) that operates on sliding contacts between n-type (gallium arsenide) GaAs and metal electrodes in the presence of periodic light illumination, which offers harvesting energy synergistically by integrating both photovoltaic and triboelectric effects to enhance the energy output. Using an in-house built test setup with provision of laser illumination, the open-circuit voltage () and short-circuit current () were measured for the n-GaAs semiconductors with different metal contacts (Al and Cu). Under both laser light (630 nm) and without laser light conditions, n-GaAs with aluminum contacts exhibited the highest and values, reaching up to 11.
View Article and Find Full Text PDFJ Physiol
September 2025
Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand.
Danicamtiv is a recently developed cardiac-specific myosin activator that directly increases actomyosin interaction and, thereby, increases force. It is currently studied pre-clinically and has entered clinical trials. In this study, we provide the first assessment of its effects on cardiac energetics.
View Article and Find Full Text PDFJ Physiol
September 2025
Marion Murray Spinal Cord Injury Research Center, Department of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, USA.
Within a year after a spinal cord injury (SCI), 75% of individuals develop spasticity. While normal movement relies on the ability to adjust reflexes appropriately, and on reciprocal inhibition of antagonistic muscles, spastic individuals display hyperactive spinal reflexes and involuntary muscle co-contractions. Current anti-spastic medications can suppress uncontrolled movements, but by acting on GABAergic signalling, these medications lead to severe side-effects and weakened muscle force, making them incompatible with activity-based therapies.
View Article and Find Full Text PDFIEEE Trans Neural Syst Rehabil Eng
September 2025
Functional electrical stimulation (FES) is an effective technique for restoring or enhancing hand motor function in patients with neurological impairments, such as those recovering from stroke or spinal cord injuries. Although many studies have used phenomenological models to investigate the control of FES, few studies have simultaneously employed both methods to study finger output force. This study aims to accurately predict finger output force using the Hill model and a multi-joint finger model under different current conditions.
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