Results 31 to 40 of about 3,357,773 (342)

The Energy Benefits of the Pantograph Wing Mechanism in Flapping Flight: Case Study of a Gull [PDF]

open access: yes, 2015
Bird wings generally contain a 4-bar pantograph mechanism in the forearm that enables the wrist joint to be actuated from the elbow joint thus reducing the number of wing muscles and hence reducing the wing inertia and inertial drag.
Sattler, Gene D.
core   +2 more sources

Does a SLAP lesion affect shoulder muscle recruitment as measured by EMG activity during a rugby tackle? [PDF]

open access: yes, 2010
Background: The study objective was to assess the influence of a SLAP lesion on onset of EMG activity in shoulder muscles during a front on rugby football tackle within professional rugby players.
A Bathgate   +70 more
core   +4 more sources

Mechanisms underlying the production of carapace vibrations and associated waterborne sounds in the American lobster, Homarus americanus [PDF]

open access: yes, 2005
American lobsters produce carapace vibrations, which also lead to waterborne acoustic signals, by simultaneously contracting the antagonistic remotor and promotor muscles located at the base of the second antenna.
Henninger, Heidi Pye   +1 more
core   +2 more sources

Exercise-induced respiratory muscle fatigue: implications for performance [PDF]

open access: yes, 2008
It is commonly held that the respiratory system has ample capacity relative to the demand for maximal O-2 and CO2 transport in healthy humans exercising near sea level.
Polkey, MI, Romer, LM
core   +1 more source

Rejuvenation of the aged muscle stem cell population restores strength to injured aged muscles

open access: yesNature Medicine, 2014
The elderly often suffer from progressive muscle weakness and regenerative failure. We demonstrate that muscle regeneration is impaired with aging owing in part to a cell-autonomous functional decline in skeletal muscle stem cells (MuSCs).
B. Cosgrove   +8 more
semanticscholar   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

Evaluation the Impact of Hormonal Fluctuations During the Menstrual Cycle on the Performance of Female Athletes—Systematic Review

open access: yesMuscles
This systematic review aims to evaluate the impact of hormonal fluctuations during the menstrual cycle on the performance of female athletes. Methods: Following PRISMA guidelines, a comprehensive search was conducted in Scopus, Web of Science, and PubMed
Ainize Elorduy-Terrado   +5 more
doaj   +1 more source

Muscle Activation during the Squat Performed in Different Ranges of Motion by Women

open access: yesMuscles, 2023
Purpose: To analyze the muscle activation of the rectus femoris (RF), vastus lateralis (VL), gluteus maximus (GM), and biceps femoris (BF) in concentric and eccentric actions in the squat at 90° and 140° range of motion. Methods: Thirty-five women (32.9 ±
Lissiane Almeida Cabral   +9 more
doaj   +1 more source

Uncovering changes in proteomic signature of rat pelvic floor muscles in pregnancy. [PDF]

open access: yes, 2019
BackgroundStructural and functional changes of the rat pelvic floor muscles during pregnancy, specifically, sarcomerogenesis, increase in extracellular matrix content, and higher passive tension at larger strains protect the integral muscle components ...
Alperin, Marianna   +4 more
core   +1 more source

Early Rehabilitation with Weight-bearing Standing-shaking-board Exercise in Combination with Electrical Muscle Stimulation after Anterior Cruciate Ligament Reconstruction [PDF]

open access: yes, 2012
The objective of early rehabilitation after anterior cruciate ligament (ACL) reconstruction is to increase the muscle strength of the lower extremities. Closed kinetic chain (CKC) exercise induces co-contraction of the agonist and antagonist muscles. The
Fujii, Toshihiro   +4 more
core   +1 more source

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