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Keywords: muscle
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Journal Articles
J Exp Biol (2022) 225 (8): jeb243372.
Published: 22 April 2022
..., athletic performance was positively correlated with muscle content and body condition, consistent with the individual quality hypothesis. In pond fish, there was only a relationship between glycolytic white muscle and aquatic burst performance. Notably, pond fish were in better body condition, which may...
Includes: Supplementary data
Journal Articles
J Exp Biol (2022) 225 (Suppl_1): jeb243351.
Published: 8 March 2022
... and contract muscle, sometimes at the expense of other activities or expression of traits. Nevertheless, convergent pathways have also evolved to deal with critical trade-offs that are necessary to survive ubiquitous environmental challenges. We discuss how whole-animal performance traits, such as locomotion...
Journal Articles
J Exp Biol (2022) 225 (4): jeb243572.
Published: 21 February 2022
... and resistance to oxidative stress during fasting. However, the cellular mechanisms that regulate these adaptations are still not fully understood. To examine how metabolic coordination is achieved during prolonged fasting, we profiled changes in blubber, skeletal muscle and plasma proteomes of adult female NES...
Includes: Supplementary data
Journal Articles
J Exp Biol (2022) 225 (1): jeb242567.
Published: 6 January 2022
...Ignacio Simó; Mariano Faggiani; Daniel A. Fernandez; Andrés A. Sciara; Silvia E. Arranz ABSTRACT This study evaluates white muscle growth and in vivo cell proliferation during a fasting and refeeding trial, using pejerrey ( Odontesthes bonariensis ) as animal model, in order to better understand...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (21): jeb243075.
Published: 4 November 2021
...Christopher J. Mayerl; Kendall E. Steer; Almasi M. Chava; Laura E. Bond; Chloe E. Edmonds; Francois D. H. Gould; Tobin L. Hieronymous; Christopher J. Vinyard; Rebecca Z. German ABSTRACT The function of a muscle is impacted by its line of action, activity timing and contractile characteristics when...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (21): jeb242698.
Published: 4 November 2021
...David S. Brooks; Kumar Vishal; Simranjot Bawa; Adrienne Alder; Erika R. Geisbrecht ABSTRACT Muscle atrophy, or a decline in muscle protein mass, is a significant problem in the aging population and in numerous disease states. Unraveling molecular signals that trigger and promote atrophy may lead...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (11): jeb217463.
Published: 8 June 2021
... ( Loxodonta africana ) . J. Zool. 189 , 135 - 144 . 10.1111/j.1469-7998.1979.tb03956.x Alexander , R. M. , Jayes , A. S. , Maloiy , G. M. O. and Wathuta , E. M. ( 1981 ). Allometry of the leg muscles of mammals . J. Zool. 194 , 539 - 552 . 10.1111/j.1469-7998.1981...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (1): jeb228973.
Published: 4 January 2021
... of elevating tissue temperature to increase the rate of chemical processes. Yet, movement performance that is robust to changes in body temperature has been observed in numerous species. This thermally robust performance appears exceptional in light of the well-documented effects of temperature on muscle...
Journal Articles
J Exp Biol (2020) 223 (24): jeb236109.
Published: 21 December 2020
..., showed altered migratory behaviour (daily activity and Zugunruhe onset), and enhanced muscle growth and plasma testosterone levels, but showed no effect on testis growth. Temperature was perceived at both peripheral and central levels, and affected multiple molecular drivers culminating...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (17): jeb227736.
Published: 11 September 2020
... is the ability of the muscle to buffer against changes in pH that occur as carbon dioxide accumulates during breath-hold. Changes in pH also result from the accumulation of lactic acid during prolonged breath-holds, as there is an increased reliance on anaerobic metabolism. In general, the buffering capacity...
Journal Articles
J Exp Biol (2020) 223 (15): jeb218776.
Published: 13 August 2020
...Jackey Chen; Parastoo Mashouri; Stephanie Fontyn; Mikella Valvano; Shakeap Elliott-Mohamed; Alex M. Noonan; Stephen H. M. Brown; Geoffrey A. Power ABSTRACT The increase or decrease in isometric force following active muscle lengthening or shortening, relative to a reference isometric contraction...
Journal Articles
J Exp Biol (2020) 223 (14): jeb218370.
Published: 27 July 2020
... from the limb flexors; however, skeletal muscle mass of sloths is reduced compared with other arboreal mammals. Although suspensory locomotion demands that muscles are active to counteract the pull of gravity, it is possible that sloths minimize muscle activation and/or selectively recruit slow motor...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (1): jeb199018.
Published: 6 January 2020
...Thomas Libby; Chidinma Chukwueke; Simon Sponberg ABSTRACT Muscle mediates movement but movement is typically unsteady and perturbed. Muscle is known to behave non-linearly and with history-dependent properties during steady locomotion, but the importance of history dependence in mediating muscle...
Journal Articles
J Exp Biol (2019) 222 (18): jeb180414.
Published: 12 September 2019
... shown that athletic performance and recovery during rehabilitation are closely related to the improvement in RFD, more so than to maximal strength measures ( Buckthorpe and Roi, 2017 ). Other examples in the area of sports science include: the dependence of maximal cycling performance upon muscle...
Journal Articles
J Exp Biol (2019) 222 (5): jeb188805.
Published: 1 March 2019
... of the limbs is related to variation in locomotor performance. Although these studies have suggested direct relations between sprint speed and hindlimb morphology, few quantitative data exist. Consequently, it remains unclear whether selection acts in limb segment lengths, overall muscle mass or muscle...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (1): jeb187807.
Published: 4 January 2019
... energetics between species ( Darveau et al., 2005a , b ) and among B. impatiens individuals ( Skandalis and Darveau, 2012 ; Darveau et al., 2014 ), we hypothesized that large bumblebee queens will have lower wingbeat frequency and mass-specific flight metabolic rate. Additionally, flight muscle metabolic...
Journal Articles
J Exp Biol (2018) 221 (6): jeb171009.
Published: 23 March 2018
... butterflies to fly continuously in a respirometer (3 min duration), which typically caused episodes of exhaustion and recovery, suggesting a potential for cellular injury from hypoxia and reoxygenation in flight muscles. Indeed, flight muscle from butterflies flown on consecutive days had lipidome profiles...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (4): jeb166199.
Published: 22 February 2018
...Steven J. Newman; Bruce C. Jayne ABSTRACT A central issue for understanding locomotion of vertebrates is how muscle activity and movements of their segmented axial structures are coordinated, and snakes have a longitudinal uniformity of body segments and diverse locomotor behaviors that are well...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (22): 4225–4233.
Published: 15 November 2017
... the transparency of the anemone shrimp Ancylomenes pedersoni . After as few as three tail flips, the previously transparent abdominal muscle became cloudy. Eliciting additional tail flips to the point of exhaustion (16±1 s.e.m.; n =23) resulted in complete opacity, though the original transparency returned after...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (6): 1154–1161.
Published: 15 March 2017
... predators on other constrictors remain unknown. To begin addressing these mechanisms, we studied the scaling of muscle cross-sectional area, pulling force and constriction pressure across the ontogeny of six species of snakes ( Lampropeltis californiae , L. getula , L. holbrooki , Pantherophis...