Results 71 to 80 of about 41,623 (301)

Effects of Maturation on Plantar Flexor Activity and Achilles Tendon Stiffness in Vertical Jumping: Sex Differences

Sports
The aim of this study was to investigate the effect of maturation on vertical jumping performance, in adolescent boys and girls, concerning plantar flexor activity and Achilles tendon (AT) stiffness.
Zacharoula Paschaleri, Georgios Chalatzoglidis, Theodoros Kannas, Fotini Arabatzi   +3 more
doaj   +1 more source

Multidirectional Plyometric Training: Very Efficient Way to Improve Vertical Jump Performance, Change of Direction Performance and Dynamic Postural Control in Young Soccer Players

Frontiers in Physiology, 2019
The aim of the study was to assess the effects of multidirectional plyometric training (MPT) on vertical jump height, change of direction performance (CODP), and dynamic postural control (DPC) in young soccer players.
Mohamed C. Jlid, Ghazi Racil, Jeremy Coquart, Thierry Paillard, Gian Nicola Bisciotti, Karim Chamari   +5 more
doaj   +1 more source

Development and Application of a Functional Human Esophageal Mucosa Explant Platform to Eosinophilic Esophagitis. [PDF]

, 2019
There is an increasing prevalence of esophageal diseases but intact human tissue platforms to study esophageal function, disease mechanisms, and the interactions between cell types in situ are lacking.
Aceves, Seema S, Adejumobi, Dolapo, Akuthota, Praveen, Dohil, Ranjan, Duong, Loan D, Jones, Stacie M, Kurten, Richard C, Levy, Rebecca, Newbury, Robert O, Rawson, Renee, Rothenberg, Marc E, Shoda, Tetsuo, Wright, Benjamin L   +12 more
core   +3 more sources

Relationships between Stretch-shortening Cycle Performance and Maximum Muscle Strength

Journal of Strength and Conditioning Research, 2008
This study aimed to examine the relationships between muscle power output using the stretch-shortening cycle (SSC) and maximum strength, as measured by the 1 RM (1 repetition maximum) test and the isokinetic dynamometer under elbow flexion. Sixteen trained, young adult males pulled a constant load of 40% MVC (maximum voluntary elbow flexion contraction)
Kazuyoshi, Miyaguchi, Shinichi, Demura
openaire   +2 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Rational Device Design and Doping‐Controlled Performance in Fast‐Response π‐Ion Gel Transistors

Advanced Functional Materials, EarlyView.
π‐Ion gel transistors (PIGTs) achieve extraordinary transconductance and stability through device configuration optimization, high‐mobility conjugated polymer selection, and hole scavenger doping. The optimized PIGTs maintain performance on flexible substrates, enabling printed, fast‐response, and wearable electronics.
Masato Kato, Soh Kushida, Nafees Umar Draz, Dan Kyotani, Emanuel Smarsly, Kyota Yoshinaga, Wenhao He, Uwe H. F. Bunz, Kazuhiro Marumoto, Tatsuya Mori, Yohei Yamamoto   +10 more
wiley   +1 more source

Effects of acute fatigue on the volitional and magnetically-evoked electromechanical delay of the knee flexors in males and females [PDF]

, 2007
Neuromuscular performance capabilities, including those measured by evoked responses, may be adversely affected by fatigue; however, the capability of the neuromuscular system to initiate muscle force rapidly under these circumstances is yet to be ...
AJ McComas, AYF Chan, BD Beynnon, BR Mandelbaum, C Minshull, Claire Minshull, D Chu, David Rees, DE Rassier, E Arendt, EM Wojtys, FH Fu, H Johansson, I Tsuji, I Vivodtzev, J Gray, JT Hopkins, K Sahlin, LJ Huston, M Solomonow, M Solomonow, MA Moore, MI Polkey, Michelle Walters-Edwards, MJ Ireland, ML Latash, Nigel Gleeson, NP Gleeson, NP Gleeson, NP Gleeson, P Sbriccoli, PR Cavanagh, PV Komi, RM Norman, Roger Eston, S Zhou, S Zhou, S Zhou, S Zhou, SJ Shultz, T Horita, TH Mercer, V Strojnik   +42 more
core   +1 more source

Ceramic Particle‐Reinforced Medium‐Entropy Alloys With Outstanding Mechanical Properties Prepared by Novel Micro‐LPBF

Advanced Functional Materials, EarlyView.
An innovative medium entropy alloy (MEA) composite material was fabricated via micro laser powder bed fusion (μ‐LPBF) with appropriate nano‐ceramic particles doping and exhibited markedly improved overall performance, including synergistically enhanced strength and ductility, increased hardness and compressive strength, improved wear resistance and ...
Zhonglin Shen, Mingwang Fu
wiley   +1 more source

The stretch-shortening cycle efficiency is dependent on the maturational stage

Revista Brasileira de Cineantropometria e Desempenho Humano, 2020
Maturation interferes with physiological and mechanical aspects of muscle contraction. The aim of the present study was to compare the efficiency of the stretch-shortening cycle (SSC) between different maturation stages.
Matheus Dantas, Victor Sabino de Queiros, Fabiano de Souza Fonseca, Paulo Francisco de Almeida-Neto, Rômulo Vasconcelos Teixeira, Leandro Medeiros da Silva, Felipe José Aidar, Dihogo Gama de Matos, Breno Guilherme de Araújo Tinoco Cabral   +8 more
doaj  

Leg stiffness and potential energy in the countermovement phase and the CMJ jump height

Biomedical Human Kinetics, 2016
Study aim: The elastic potential energy accumulated in the musculotendinous units during the countermovement phase of a jump adds up to the energy supplied by the contracting muscles used in the take-off phase.
Struzik Artur, Zawadzki Jerzy, Rokita Andrzej   +2 more
doaj   +1 more source