Results 41 to 50 of about 43,102 (265)

From Folding Mechanics to Robotic Function: A Unified Modeling Framework for Compliant Origami

Advanced Science, EarlyView.
A geometry‐consistent DDG framework captures compliant origami deformation from rigid‐like folding to soft panel bending. By tuning crease and panel stiffness, bistable snap‐through responses transform into smooth monostable deformation, enabling programmable stability and robot‐scale locomotion.
Bohan Zhang, Bo Wang, Huajiang Ouyang, Zhigang Wu, Haohao Bi, Jiawei Xu, Mingchao Liu, Weicheng Huang   +7 more
wiley   +1 more source

Flexor pronator muscles' contribution to elbow joint valgus stability: ultrasonographic analysis in high school pitchers with and without symptoms

JSES International, 2020
Background: Few researchers have examined the different contributions of flexor-pronator muscles to valgus stress in high school baseball pitchers with and without elbow symptoms.
Tsuyoshi Tajika, MD, PhD, Noboru Oya, MD, PhD, Tsuyoshi Ichinose, MD, PhD, Noritaka Hamano, MD, PhD, Tsuyoshi Sasaki, MD, PhD, Daisuke Shimoyama, MD, Hitoshi Shitara, MD, PhD, Atsushi Yamamoto, MD, PhD, Tsutomu Kobayashi, MD, PhD, Masaaki Sakamoto, RPT, PhD, Kenji Takagishi, MD, PhD, Hirotaka Chikuda, MD, PhD   +11 more
doaj   +1 more source

Self‐Powered All‐in‐One Wearable Bioelectronics Driven by Pneumatic Energy Buffering of Daily Footsteps

Advanced Science, EarlyView.
A pneumatic energy‐buffering strategy transforms transient and intermittent footsteps into quasi‐continuous electrical energy for a self‐powered wearable biosensing platform. The footwear‐integrated air‐pumping harvester, combined with the rationally designed power‐management system, powers a wearable ankle PPG device with reduced motion artifacts ...
Ji‐Seok Kim, Tae Woog Kang, Hyunjoon Yoo, Jawon Ha, Yunuo Huang, Hee Han, Chi Won Ahn, Woon‐Hong Yeo, Il‐Kwon Oh   +8 more
wiley   +1 more source

Effects of different vibration frequencies, amplitudes and contraction levels on lower limb muscles during graded isometric contractions superimposed on whole body vibration stimulation

Journal of Rehabilitation and Assistive Technologies Engineering, 2019
Background Indirect vibration stimulation, i.e., whole body vibration or upper limb vibration, has been investigated increasingly as an exercise intervention for rehabilitation applications.
Amit N Pujari, Richard D Neilson, Marco Cardinale   +2 more
doaj   +1 more source

Acute blood pressure responses after different isometric handgrip protocols in hypertensive patients

Clinics, 2018
OBJECTIVE: The present study analyzed blood pressure responses after a single session of isometric handgrip exercise performed with different volumes and intensities by patients with hypertension.
Gustavo O. Silva, Breno Q. Farah, Antonio H. Germano-Soares, Aluísio Andrade-Lima, Fabio S. Santana, Sérgio LC. Rodrigues, Raphael M. Ritti-Dias   +6 more
doaj   +1 more source

Reliability of isometric and isokinetic trunk flexor strength using a functional electromechanical dynamometer [PDF]

PeerJ, 2019
Aim To determine the absolute and relative reliability of functional trunk tests, using a functional electromechanical dynamometer to evaluate the isokinetic strength of trunk flexors and to determine the most reliable assessment condition, in order to ...
Angela Rodriguez-Perea, Luis J. Chirosa Ríos, Dario Martinez-Garcia, David Ulloa-Díaz, Francisco Guede Rojas, Daniel Jerez-Mayorga, Ignacio J. Chirosa Rios   +6 more
doaj   +2 more sources

Perceived Time Shapes Physical Fatigue Accumulation and Its Neural Oscillatory Correlates

Advanced Science, EarlyView.
Can a clock change the course of physical fatigue? By covertly manipulating the clock calibration during repeated isometric contractions, we showed that perceived time shapes fatigue accumulation and frontal oscillatory dynamics. While fatigue accumulation was only reduced when the clock was slowed down, frontal oscillatory dynamics followed perceived ...
Pierre‐Marie Matta, Julien Duclay, Robin Baurès, Andrea Alamia   +3 more
wiley   +1 more source

Ca2+ and force during dynamic contractions in mouse intact skeletal muscle fibers

Scientific Reports
Muscle fiber force production is determined by the excitation frequency of motor nerves, which induce transient increases in cytoplasmic free Ca2+ concentration ([Ca2+]i) and the force-generating capacity of the actomyosin cross-bridges. Previous studies
Atsuki Fukutani, Håkan Westerblad, Kent Jardemark, Joseph Bruton   +3 more
doaj   +1 more source

Force depression following a stretch-shortening cycle is independent of stretch peak force and work performed during shortening

Scientific Reports, 2018
The steady-state isometric force following active muscle shortening or lengthening is smaller (force depression; FD) or greater (residual force enhancement; RFE) than a purely isometric contraction at the corresponding length. The mechanisms behind these
Rafael Fortuna, Hannah Kirchhuebel, Wolfgang Seiberl, Geoffrey A. Power, Walter Herzog   +4 more
doaj   +1 more source

Fatigue-Mediated Loss of Complexity is Contraction-Type Dependent in Vastus Lateralis Electromyographic Signals

Sports, 2019
The purpose of this study was to investigate the effect of fatigue status and contraction type on complexity of the surface electromyographic (sEMG) signal.
Luis R. Hernandez, Clayton L. Camic
doaj   +1 more source