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Dive into the research topics where Joel D. Trinity is active.

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Featured researches published by Joel D. Trinity.


Journal of Applied Physiology | 2013

Comments on point:counterpoint: skeletal muscle mechanical efficiency does/does not increase with age.

Gwenael Layec; Joel D. Trinity; Corey R. Hart; James G. Hopker; Louis Passfield; Paul M. Coen; Kevin E. Conley; Gary R. Hunter; Gordon Fisher; Richard A. Ferguson; Kazushige Sasaki; Davide Malatesta; Nicola A. Maffiuletti; Fabio Borrani; Alberto E. Minetti; Charles L. Rice; Brian H. Dalton; Chris J. McNeil; Geoff A Power; Todd M. Manini

TO THE EDITOR: There is little doubt that the cost of locomotion is impaired with age as it is evident that centenarians, due to their exceptional longevity, present unique adaptations in their skeletal muscle efficiency to compensate for their extremely low VO2max. However, the underlying question of whether skeletal muscle efficiency is altered with age is unsettled (4, 6). In fact, both opponents present compelling evidence in support of their opinion, and the reason for this disagreement is likely that both authors are looking at different muscles. Indeed, there is accumulating evidence that age-related alterations in skeletal muscle efficiency vary among muscle group. For instance, a selective atrophy, independent of the fiber type, has been documented in skeletal muscles with age (5). It is therefore likely that a similar phenomenon occurs for muscle energetics properties. The suggestion that ATP cost of contraction is improved with age (6) is based on examinations of the tibialis anterior. Interestingly, this muscle also exhibits preserved features with age in terms of mitochondrial efficiency (1) and oxidative capacity (3). In contrast, reduced oxidative capacity (3), in conjunction with impaired mitochondrial and contractile efficiency (2), has been documented in the quadriceps, which would, at least partially, explain the increased cost of locomotion with age as this muscle group is a major contributor to force production during these activities. The reasons for the heterogeneous effect of aging on skeletal muscle efficiency remain unclear, but likely stem from differences in fiber type and chronic load associated with locomotion.


Archive | 2015

skeletal muscle adaptations of mitochondrial function in human Training at high exercise intensity promotes qualitative

Evelyne Lonsdorfer; Bertrand Mettauer; Joffrey Zoll; Elodie Ponsot; Robert A. Jacobs; Carsten Lundby; Russell S. Richardson; Gwenael Layec; Luke J. Haseler; Joel D. Trinity; Corey R. Hart; Xin Liu


Archive | 2015

responses to calf exercise in humans activation on anterior cerebral artery blood velocity Influence of central command and muscle afferent

Lauro C. Vianna; Claudio Gil; James P. Fisher; Massimo Venturelli; Markus Amann; John McDaniel; Joel D. Trinity; A. S. Fjeldstad; Russell S. Richardson; Paul J. Fadel; Shekhar H. Deo; Areum K. Jensen; Seth W. Holwerda


Archive | 2015

responses to head-up tilt in healthy subjects Age dependency of cardiovascular autonomic

Tomi Laitinen; Leo Niskanen; Ghislaine Geelen; Jan T. Groothuis; Dick H. J. Thijssen; Miriam Kooijman; Rebecca Paulus; T E Maria; H. Edgell; A. D. Robertson; Richard L. Hughson; Russell S. Richardson; H. Jonathan Groot; Joel D. Trinity; Gwenael Layec; Matthew J. Rossman; Stephen J. Ives


Archive | 2015

blood flow and arterial blood pressure during exercise Taming the ''sleeping giant'': the role of endothelin-1 in the regulation of skeletal muscle

John B. Buckwalter; Jay S. Naik; Zoran Valic; Philip S. Clifford; Masaki Mizuno; Gary A. Iwamoto; Wanpen Vongpatanasin; Jere H. Mitchell; Scott A. Smith; Russell S. Richardson; Michelle T. Mueller; Gerald S. Treiman; Christopher Ward; Joel D. Trinity; Jayson R. Gifford; Stephen J. Ives; Robert H. I. Andtbacka


Archive | 2015

blood flow at rest and after a single muscle contraction Effects of acetylcholine and nitric oxide on forearm

Richard L. Hughson; Michael E. Tschakovsky; J. K. Shoemaker; John R. Halliwill; M. J. Joyner; E. Morgan; Ben S. Gmelch; Amber D. Bledsoe; Russell S. Richardson; Joel D. Trinity; H. Jonathan; Gwenael Layec; Matthew J. Rossman; Stephen J. Ives; Lauro C. Vianna; Paul J. Fadel; Niels H. Secher; James P. Fisher; Michael J. Joyner; Darren P. Casey


Archive | 2015

Muscles With Age Evidence of Preserved Oxidative Capacity and Oxygen Delivery in the Plantar Flexor (PDF)

A Biol; Jacob R. Sorensen; Eun-Kee Jeong; Russell S. Richardson; Corey R. Hart; Gwenael Layec; Joel D. Trinity; Xin Liu; Seong-Eun Kim; H. Jonathan Groot; Anni Vanhatalo; Andrew M. Jones; James R. Blackwell; Paul G. Winyard; Jonathan Fulford; David F. Wilson


Archive | 2015

concentration in older women Aerobic exercise training reduces plasma endothelin-1

Motoyuki Iemitsu; Shinya Kuno; Ryuichi Ajisaka; Iwao Yamaguchi; Seiji Maeda; Takumi Tanabe; Takashi Miyauchi; Takeshi Otsuki; Jun Sugawara; Russell S. Richardson; D. Walter Wray; Anthony J. Donato; Sean Runnels; David E. Morgan; Benjamin S. Gmelch; Amber D. Bledsoe; Zachary Barrett-O; Stephen J. Ives; Joel D. Trinity; Garrett Morgan; Matthew J. Rossman; Hiroshi Kumagai; Satoshi Oikawa; Tomoko Matsubara; Asako Miyaki; Nobuhiko Akazawa; Youngju Choi; Song-Gyu Ra


Archive | 2015

arteriesndent dilation in skeletal muscle feed Aging induces muscle-specific impairment of

Christopher R. Woodman; Elmer M. Price; Jacob R. Sorensen; Eun-Kee Jeong; Russell S. Richardson; Corey R. Hart; Gwenael Layec; Joel D. Trinity; Xin Liu; Seong-Eun Kim; H. Jonathan Groot; Tomohiro Matsuhashi; Motoaki Sano; Keiichi Fukuda; Makoto Suematsu; Kayoko Tamaki; Kentaro Ito; Xiaoxiang Yan; Tsunehisa Yamamoto


Archive | 2015

flowinfluence of aging on exercising leg blood

David N. Proctor; Beth A. Parker; Sandra L. Smithmyer; Justin A. Pelberg; Aaron D. Mishkin; Jacob R. Sorensen; Eun-Kee Jeong; Russell S. Richardson; Corey R. Hart; Gwenael Layec; Joel D. Trinity; Xin Liu; Seong-Eun Kim; H. Jonathan Groot; E. Morgan; Ben S. Gmelch; Amber D. Bledsoe; H. Jonathan; Matthew J. Rossman; Stephen J. Ives; D. Walter Wray; Anthony J. Donato; Sean Runnels; David E. Morgan; Benjamin S. Gmelch; Zachary Barrett-O; Garrett Morgan

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