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Keywords: Exercise
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Journal Articles
J Exp Biol (2021) 224 (16): jeb210849.
Published: 13 August 2021
... into the systems-level mechanisms underlying the evolution of complex performance traits. O 2 cascade Symmorphosis Physiological control concept Exercise Thermogenic capacity High-altitude adaptation Complex traits Natural Sciences and Engineering Research Council of Canada http://dx.doi.org...
Journal Articles
J Exp Biol (2021) 224 (13): jeb232520.
Published: 29 June 2021
... provide evidence that O 2 supply capacity is not constant in all fishes, with some species exhibiting an elevated O 2 supply capacity in hypoxic environments. We further discuss the divergent selective pressures on hypoxia- and exercise-based cardiorespiratory adaptations in fishes, while also considering...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (8): jeb235846.
Published: 26 April 2021
... foraging effort and reproduction affects overall daily energy expenditure in zebra finches and provides evidence for sex-specific differences in energy management strategies. Exercise Workload Parental care Energetics Reproduction Taeniopygia guttata Free-living animals often engage...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (6): jeb234237.
Published: 18 March 2021
...Franziska Röchner; Angelika Schmitt; Anne-Lena Brändle; Annunziata Fragasso; Barbara Munz ABSTRACT Regular exercise induces a broad spectrum of adaptation reactions in a variety of tissues and organs. However, the respective mechanisms are incompletely understood. In the context of their analysis...
Journal Articles
J Exp Biol (2021) 224 (4): jeb239699.
Published: 25 February 2021
... developmental periods potentially has long-lasting impacts on hosts. Using four selectively bred high runner and four non-selected control lines of mice, we examined the effects of early-life diet and exercise manipulations on the adult microbiome by sequencing the hypervariable internal transcribed spacer...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (5): jeb217125.
Published: 11 March 2020
... to the interacting stressors of hypoxia and exercise vary among individuals, and that HT and change in HT are not simple functions of aerobic metabolic rate. * Author for correspondence ( kkraskura@ucsb.edu ) Competing interests The authors declare no competing or financial interests. 22 10 2019...
Journal Articles
J Exp Biol (2020) 223 (5): jeb214163.
Published: 11 March 2020
... and hunting prey. This response is variable and modulated by factors such as dive duration, depth, exercise and cognitive control. This study assessed the potential role of exercise and relative lung volume in the regulation of heart rate ( f H ) during dives of adult female California sea lions instrumented...
Journal Articles
J Exp Biol (2020) 223 (4): jeb215335.
Published: 20 February 2020
... at factors beyond the heart, namely vascular capacitance and conductance. Capacitance Vasculature Cardiac output Mean circulatory filling pressure Reptile Fish Resistance Exercise Stroke volume Contractility Inotropy Vasodilatation Arthur C. Guyton (1919–2003) revolutionised our...
Journal Articles
J Exp Biol (2019) 222 (23): jeb213058.
Published: 10 December 2019
... activity patterns, we analyzed femora of growing turkeys that were experimentally exercised for 10 weeks on either an inclined or declined treadmill or served as controls ( N =15 individuals, 5 per group). Our multivariate approach identified certain patterns involving three different entheses (associated...
Journal Articles
J Exp Biol (2019) 222 (16): jeb205211.
Published: 16 August 2019
... species. Swimming resulted in a general tachycardia that increased both Q̇ sys and Q̇ pul ( Fig. 1 A). These cardiovascular changes appear to be a response to exercise and not a general ‘stress’ response because increasing water speed in the absence of swimming ( Fig. 1 B) was not associated...
Journal Articles
J Exp Biol (2019) 222 (14): jeb199711.
Published: 19 July 2019
...Fabo Shan; Tao Yang; Junxia Li; Qing-Yuan Huang ABSTRACT It is well known that exercise-induced fatigue is exacerbated following hypoxia exposure and may arise from central and/or peripheral mechanisms. To assess the relative contribution of peripheral and central factors to exercise-induced...
Journal Articles
J Exp Biol (2019) 222 (10): jeb198424.
Published: 29 May 2019
...Hossein Shirvani; Saleh Rahmati-Ahmadabad; David Robert Broom; Reza Mirnejad ABSTRACT The hypothalamus controls metabolism and feeding behaviour via several signals with other tissues. Exercise and supplements can change hypothalamic signalling pathways, so the present study investigated...
Journal Articles
J Exp Biol (2019) 222 (9): jeb201400.
Published: 30 April 2019
... in zebrafish ( Danio rerio ). We rejected the hypothesis that mitochondrial efficiency (P/O ratios) predicted CoT. We also rejected the hypothesis that CoT is modulated by temperature acclimation, exercise training or their interaction, although CoT increased with increasing acute test temperature...
Journal Articles
J Exp Biol (2019) 222 (6): jeb197426.
Published: 27 March 2019
... at 8°C only, it would yield essentially the same, highly significant change ( P <0.01) for both resistance and conductance. However, we argue that this would not be the immediate, or most appropriate, choice for the original two-factor (temperature and exercise) analysis. Furthermore, this would...
Journal Articles
J Exp Biol (2018) 221 (22): jeb191056.
Published: 14 November 2018
...Kang Nian Yap; Morag F. Dick; Christopher G. Guglielmo; Tony D. Williams ABSTRACT Despite widely held assumptions that hematocrit (Hct) is a key determinant of aerobic capacity and exercise performance, this relationship has not often been tested rigorously in birds and results to date are mixed...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (21): jeb164327.
Published: 31 October 2018
...Hans Hoppeler ABSTRACT Maximal oxygen consumption ( V̇ O 2 ,max ) denotes the upper limit of aerobic energy flux through the cascade of oxygen transfer from the environment to tissue mitochondria, essentially to skeletal muscle mitochondria during intense exercise. A high V̇ O 2 ,max is a key...
Journal Articles
J Exp Biol (2018) 221 (8): jeb176867.
Published: 23 April 2018
..., maintenance and production. We manipulated individual investment in performance by training Anolis carolinensis lizards for endurance or sprinting ability. We then measured energetic expenditure both at rest and immediately following exercise to test whether such training alters the maintenance and production...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (Suppl_1): jeb161570.
Published: 07 March 2018
...Adam C. Lehnig; Kristin I. Stanford; Raul K. Suarez; Hans H. Hoppeler ABSTRACT The beneficial effects of exercise on skeletal muscle and the cardiovascular system have long been known. Recent studies have focused on investigating the effects of exercise on adipose tissue and the effects...
Journal Articles
J Exp Biol (2018) 221 (Suppl_1): jeb165753.
Published: 07 March 2018
... and the role of leptin . Gen. Comp. Endocr. 221 , 278 - 283 . 10.1016/j.ygcen.2014.12.009 Brooks , G. A. ( 1998 ). Mammalian fuel utilization during sustained exercise . Comp. Biochem. Physiol. B 120 , 89 - 107 . 10.1016/S0305-0491(98)00025-X Burns , J. G. and Ydenberg , R...
Journal Articles
J Exp Biol (2018) 221 (2): jeb171553.
Published: 29 January 2018
...Eric D. Turenne; Jean-Michel Weber ABSTRACT The mobilization of mammalian lipid reserves is strongly stimulated during exercise to reach a maximum at moderate intensities, but the effects of swimming speed on fish lipolysis have never been quantified. Continuous infusion of 2-[ 3 H]glycerol...