1
|
John K, Page J, Heffernan SM, Conway GE, Bezodis NE, Kilduff LP, Clark B, Périard JD, Waldron M. The effect of a 4-week, remotely administered, post-exercise passive leg heating intervention on determinants of endurance performance. Eur J Appl Physiol 2024:10.1007/s00421-024-05558-4. [PMID: 39052044 DOI: 10.1007/s00421-024-05558-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 07/13/2024] [Indexed: 07/27/2024]
Abstract
PURPOSE Post-exercise passive heating has been reported to augment adaptations associated with endurance training. The current study evaluated the effect of a 4-week remotely administered, post-exercise passive leg heating protocol, using an electrically heated layering ensemble, on determinants of endurance performance. METHODS Thirty recreationally trained participants were randomly allocated to either a post-exercise passive leg heating (PAH, n = 16) or unsupervised training only control group (CON, n = 14). The PAH group wore the passive heating ensemble for 90-120 min/day, completing a total of 20 (16 post-exercise and 4 stand-alone leg heating) sessions across 4 weeks. Whole-body (peak oxygen uptake, gas exchange threshold, gross efficiency and pulmonary oxygen uptake kinetics), single-leg exercise (critical torque and NIRS-derived muscle oxygenation), resting vascular characteristics (flow-mediated dilation) and angiogenic blood measures (nitrate, vascular endothelial growth factor and hypoxia inducible factor 1-α) were recorded to characterize the endurance phenotype. All measures were assessed before (PRE), at 2 weeks (MID) and after (POST) the intervention. RESULTS There was no effect of the intervention on test of whole-body endurance capacity, vascular function or blood markers (p > 0.05). However, oxygen kinetics were adversely affected by PAH, denoted by a slowing of the phase II time constant; τ (p = 0.02). Furthermore, critical torque-deoxygenation ratio was improved in CON relative to PAH (p = 0.03). CONCLUSION We have demonstrated that PAH had no ergogenic benefit but instead elicited some unfavourable effects on sub-maximal exercise characteristics in recreationally trained individuals.
Collapse
Affiliation(s)
- Kevin John
- Research Institute for Sport and Exercise, University of Canberra, Canberra, Australia
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK
| | - Joe Page
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK
| | - Shane M Heffernan
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK
| | - Gillian E Conway
- Institute of Life Science, Faculty of Medicine, Health and Life Sciences, Swansea University, Swansea, UK
| | - Neil E Bezodis
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK
- Welsh Institute of Performance Science, Swansea University, Swansea, UK
| | - Liam P Kilduff
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK
- Welsh Institute of Performance Science, Swansea University, Swansea, UK
| | - Brad Clark
- Research Institute for Sport and Exercise, University of Canberra, Canberra, Australia
| | - Julien D Périard
- Research Institute for Sport and Exercise, University of Canberra, Canberra, Australia
| | - Mark Waldron
- Applied Sports Science Technology and Medicine (A-STEM) Research Centre, Faculty of Science & Engineering, Swansea University, Bay Campus, Swansea, SA1 8EN, Wales, UK.
- Welsh Institute of Performance Science, Swansea University, Swansea, UK.
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Maroochydore, QLD, Australia.
| |
Collapse
|
2
|
Bailey TW, Venkatraman A, Cannes do Nascimento N, Cox A, Sivasankar MP. Water Versus Electrolyte Rehydration on Vocal Fold Osmotic and Oxidative Stress Gene Expression. Laryngoscope 2024. [PMID: 38979957 DOI: 10.1002/lary.31631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 06/20/2024] [Accepted: 06/25/2024] [Indexed: 07/10/2024]
Abstract
OBJECTIVES Systemic dehydration may induce osmotic and oxidative stress in the vocal folds, but our knowledge of the biology and mitigation with rehydration is limited. The purpose of this experiment was to evaluate whether systemic dehydration induces vocal fold oxidative and osmotic stress and to compare the impact of rehydration by water intake versus electrolyte intake on osmotic and oxidative stress-related gene expression. METHODS Four-month-old male Sprague-Dawley rats (N = 32) underwent water restriction. Rehydration was achieved with ad libitum access to water or electrolytes for 24 hours. Rats were divided into four groups: euhydration control, dehydration-only, dehydration followed by either water or electrolyte rehydration (n = 8/group). Gene expression was assessed via RT2 Gene Expression Profiler arrays. RESULTS With respect to oxidative stress, 10 genes were upregulated and 2 were downregulated after vocal fold dehydration compared with the euhydrated control. Concerning osmotic stress, six genes were upregulated with dehydration only, six genes were upregulated following rehydration with water, whereas a single gene was upregulated with electrolyte rehydration. All genes with significantly different expression between the rehydration groups showed lower expression with electrolytes compared with water. CONCLUSIONS The results support a potential role of oxidative and osmotic stresses in vocal folds related to systemic dehydration. The differences in stress-related gene expression in vocal fold tissue between rehydration with electrolytes or water, albeit modest, suggest that both rehydration options offer clinical utility to subjects experiencing vocal fold dehydration with preliminary evidence that electrolytes may be more effective than water in resolving osmotic stress. LEVELS OF EVIDENCE NA (prospective animal study) Laryngoscope, 2024.
Collapse
Affiliation(s)
- Taylor W Bailey
- Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana, U.S.A
| | - Anumitha Venkatraman
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, U.S.A
| | | | - Abigail Cox
- Department of Comparative Pathobiology, Purdue University, West Lafayette, Indiana, U.S.A
| | - M Preeti Sivasankar
- Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana, U.S.A
| |
Collapse
|
3
|
Lin X, Zhang K, Li C, Liu K, Sun Y, Wu W, Liu K, Yi X, Wang X, Qu Z, Liu X, Xing Y, Walker MJ, Gong Q, Liu R, Xu X, Lin CH, Sun G. Combination of Dasatinib and Quercetin alleviates heat stress-induced cognitive deficits in aged and young adult male mice. Eur J Pharmacol 2024; 974:176631. [PMID: 38692425 DOI: 10.1016/j.ejphar.2024.176631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/29/2024] [Accepted: 04/29/2024] [Indexed: 05/03/2024]
Abstract
OBJECTIVE Dasatinib and quercetin (D & Q) have demonstrated promise in improving aged-related pathophysiological dysfunctions in humans and mice. Herein we aimed to ascertain whether the heat stress (HS)-induced cognitive deficits in aged or even young adult male mice can be reduced by D & Q therapy. METHODS Before the onset of HS, animals were pre-treated with D & Q or placebo for 3 consecutive days every 2 weeks over a 10-week period. Cognitive function, intestinal barrier permeability, and blood-brain barrier permeability were assessed. RESULTS Compared to the non-HS young adult male mice, the HS young adult male mice or the aged male mice had significantly lesser extents of the exacerbated stress reactions, intestinal barrier disruption, endotoxemia, systemic inflammation and oxidative stress, blood-brain barrier disruption, hippocampal inflammation and oxidative stress, and cognitive deficits evaluated at 7 days post-HS. All the cognitive deficits and other syndromes that occurred in young adult HS mice or in aged HS mice were significantly attenuated by D & Q therapy (P < 0.01). Compared to the young adult HS mice, the aged HS mice had significantly (P < 0.01) higher severity of cognitive deficits and other related syndromes. CONCLUSIONS First, our data show that aged male mice are more vulnerable to HS-induced cognitive deficits than those of the young adult male mice. Second, we demonstrate that a combination of D and Q therapy attenuates cognitive deficits in heat stressed aged or young adult male mice via broad normalization of the brain-gut-endotoxin axis function.
Collapse
Affiliation(s)
- Xiaojing Lin
- Key Laboratory of Military Medical Psychology and Stress Biology of PLA, Jinan, Shandong Province, PR China
| | - Kangli Zhang
- Key Laboratory of Military Medical Psychology and Stress Biology of PLA, Jinan, Shandong Province, PR China
| | - Chenyi Li
- Key Laboratory of Military Medical Psychology and Stress Biology of PLA, Jinan, Shandong Province, PR China
| | - Kewei Liu
- Department of General Medicine, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China
| | - Yanping Sun
- Department of Applied Psychology, College of Sports and Health, Shandong Sport University, Shandong, PR China
| | - Wei Wu
- Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Kai Liu
- Department of Medical Imaging, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China
| | - Xeuqing Yi
- Department of Medical Imaging, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China
| | - Xiaowen Wang
- Frankston ED, Peninsula Health, Frankston Hospital, 2 Hastings Rd, Frankston, Victoria, 3199, Australia
| | - Zixuan Qu
- Key Laboratory of Military Medical Psychology and Stress Biology of PLA, Jinan, Shandong Province, PR China
| | - Xiaohong Liu
- Department of Pathology, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China
| | - Yao Xing
- Wuhan United Imaging Life Science Instrument Co., Ltd., 99 Gaokeyuan Rd., Wuhan East High-Tech Development Zone, Wuhan, Hubei, PR China
| | - M J Walker
- Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Qinglei Gong
- Department of Medical Imaging, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China
| | - Ruoxu Liu
- State Key Laboratory of Proteomics and Department of Neurobiology, Beijing Institute of Basic Medical Sciences, Beijing, PR China
| | - Xiaoming Xu
- Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Cheng-Hsien Lin
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan.
| | - Gang Sun
- Key Laboratory of Military Medical Psychology and Stress Biology of PLA, Jinan, Shandong Province, PR China; Department of Medical Imaging, The 960th Hospital of Joint Logistics Support Force of PLA, Shandong Province, PR China.
| |
Collapse
|
4
|
Davis MS, Bayly WM, Hansen CM, Barrett MR, Blake CA. Effects of hyperthermia and acidosis on mitochondrial production of reactive oxygen species. Am J Physiol Regul Integr Comp Physiol 2023; 325:R725-R734. [PMID: 37811714 DOI: 10.1152/ajpregu.00177.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/06/2023] [Accepted: 10/06/2023] [Indexed: 10/10/2023]
Abstract
Exercise is associated with the development of oxidative stress, but the specific source and mechanism of production of pro-oxidant chemicals during exercise has not been confirmed. We used equine skeletal muscle mitochondria to test the hypothesis that hyperthermia and acidosis affect mitochondrial oxygen consumption and production of reactive oxygen species (ROS). Skeletal muscle biopsies were obtained at rest, after an acute episode of fatiguing exercise, and after a 9-wk conditioning program to increase aerobic fitness. Mitochondrial oxygen consumption and ROS production were measured simultaneously using high-resolution respirometry. Both hyperthermia and acidosis increased nonphosphorylating (LEAK) respiration (5.8× and 3.0×, respectively, P < 0.001) and decreased efficiency of oxidative phosphorylation. The combined effects of hyperthermia and acidosis resulted in large decreases in phosphorylating respiration, further decreasing oxidative phosphorylation efficiency from 97% to 86% (P < 0.01). Increased aerobic fitness reduced the effects of acidosis on LEAK respiration. Hyperthermia increased and acidosis decreased ROS production (2× and 0.23×, respectively, P < 0.001). There was no effect of acute exercise, but an aerobic conditioning program was associated with increased ROS production during both nonphosphorylating and phosphorylating respiration. Hyperthermia increased the ratio of ROS production to O2 consumption during phosphorylating respiration, suggesting that high-temperature impaired transfer of energy through the electron transfer system despite relatively low mitochondrial membrane potential. These data support the role of skeletal muscle mitochondria in the development of exercise-induced oxidative stress, particularly during forms of exercise that result in prolonged hyperthermia without acidosis.NEW & NOTEWORTHY The results of this study provide evidence for the role of mitochondria-derived ROS in the development of systemic oxidative stress during exercise as well as skeletal muscle diseases such as exertional rhabdomyolysis.
Collapse
Affiliation(s)
- Michael S Davis
- Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma, United States
| | - Warwick M Bayly
- Department of Veterinary Clinical Sciences, Washington State University, Pullman, Washington, United States
| | - Cristina M Hansen
- Department of Veterinary Medicine, University of Alaska Fairbanks, Fairbanks, Alaska, United States
| | - Montana R Barrett
- Department of Physiological Sciences, Oklahoma State University, Stillwater, Oklahoma, United States
| | - Cara A Blake
- Central Hospital for Veterinary Medicine, North Haven, Connecticut, United States
| |
Collapse
|
5
|
Lisi V, Senesi G, Balbi C. Converging protective pathways: Exploring the linkage between physical exercise, extracellular vesicles and oxidative stress. Free Radic Biol Med 2023; 208:718-727. [PMID: 37739138 DOI: 10.1016/j.freeradbiomed.2023.09.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/27/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
Physical Exercise (EXR) has been shown to have numerous beneficial effects on various systems in the human body. It leads to a decrease in the risk of mortality from chronic diseases, such as cardiovascular disease, cancer, metabolic and central nervous system disorders. EXR results in improving cardiovascular fitness, cognitive function, immune activity, endocrine action, and musculoskeletal health. These positive effects make EXR a valuable intervention for promoting overall health and well-being in individuals of all ages. These beneficial effects are partially mediated by the role of the regular EXR in the adaptation to redox homeostasis counteracting the sudden increase of ROS, the hallmark of many chronic diseases. EXR can trigger the release of numerous humoral factors, e.g. protein, microRNA (miRs), and DNA, that can be shuttled as cargo of Extracellular vesicles (EVs). EVs show different cargo modification after oxidative stress stimuli as well as after EXR. In this review, we aim to highlight the main studies on the role of EVs released during EXR and oxidative stress conditions in enhancing the antioxidant enzymes pathway and in the decrease of oxidative stress environment mediated by their cargo.
Collapse
Affiliation(s)
- Veronica Lisi
- Unit of Biology and Genetics of Movement, Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Piazza Lauro de Bosis 15, 00135 Rome, Italy.
| | - Giorgia Senesi
- Cellular and Molecular Cardiology, Istituto Cardiocentro Ticino, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland; Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland
| | - Carolina Balbi
- Cellular and Molecular Cardiology, Istituto Cardiocentro Ticino, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland; Center for Molecular Cardiology, Zurich, Switzerland
| |
Collapse
|
6
|
Yoshida E, Hayashida H. Influence of Practice Periodization and Sleep Duration on Oxidative Stress in High School Judo Athletes. Sports (Basel) 2023; 11:163. [PMID: 37755840 PMCID: PMC10536924 DOI: 10.3390/sports11090163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 09/28/2023] Open
Abstract
Numerous research studies have investigated the relationship between exercise, oxidative stress level, and condition in athletes who engage in intense training on a daily basis. However, it is known that oxidative stress is affected by exercise, sleep, and the psychological state, but there are only a few studies that have comprehensively examined oxidative stress based on the actual practice periods and living conditions of athletes. Therefore, our study aimed to explore the influence of three distinct training periods (short training period, intensive training period, and pre-competition periods) as well as life situations (sleep and number of steps) on oxidative stress levels (diacron reactive oxygen metabolites: d-ROMs) in high school judo athletes. The results showed that, among the three periods, the level of oxidative stress increased the most during the pre-competition period, and the value was higher than during the training period, when the intensity of training was highest. The levels of the d-ROMs values during the pre-competition period were negatively correlated with the amount of sleep on the previous day. The findings suggest that, besides the exercise intensity, factors such as sleep duration and other life situations should be regarded as critical considerations for high school judo athletes.
Collapse
Affiliation(s)
| | - Harumi Hayashida
- Graduate School of Sport Sciences, Toin University of Yokohama, 1614 Kuroganecho, Aoba Ward, Yokohama 225-0025, Japan;
| |
Collapse
|
7
|
Goulet N, McCormick JJ, King KE, Notley SR, Goldfield GS, Fujii N, Amano T, Kenny GP. Elevations in serum brain-derived neurotrophic factor following occupational heat stress are not influenced by age or common chronic disease. Temperature (Austin) 2023; 10:454-464. [PMID: 38130657 PMCID: PMC10732602 DOI: 10.1080/23328940.2023.2176107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
With global warming, workers are increasingly exposed to strenuous occupations in hot environments. Given age- and disease-associated declines in thermoregulatory function, older workers are at an elevated risk of developing heat-related injuries. Brain-derived neurotrophic factor (BDNF) is thought to confer neuroprotection during acute exercise, however, the influence of environmental heat on BDNF responses during prolonged work remains unclear. Therefore, we evaluated serum BDNF concentrations before and after 180 min of moderate-intensity treadmill walking (200 W/m2) and after 60 min of post-exercise recovery in temperate (wet-bulb globe temperature (WBGT) 16°C) and hot (WBGT 32°C) environments in 13 healthy young men (mean [SD; 22 [3] years), 12 healthy older men (59 [4] years), 10 men with hypertension (HTN) (60 [4] years), and 9 men with type 2 diabetes (T2D) (60 [5] years). In the temperate condition, all but one participant (1 HTN) completed the 180 min of exercise. While exercise tolerance in the heat was lower in older men with HTN (117 min [45]) and T2D (123 min [42]) compared to healthy older men (159 min [31]) (both p ≤ 0.049), similar end-exercise rectal temperatures (38.9°C [0.4]) were observed across groups, paralleled by similar elevations in serum BDNF across groups at end-exercise (+1106 pg/mL [203]) and end-recovery (+938 pg/mL [146]; all p ≤ 0.01) in the heat. No changes in serum BDNF were observed in the temperate condition. Our findings indicate similar BDNF responses in individuals with HTN or T2D compared to their healthy counterparts, despite exhibiting reduced tolerance to heat.
Collapse
Affiliation(s)
- Nicholas Goulet
- Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
- Behavioural and Metabolic Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
| | - James J. McCormick
- Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
| | - Kelli E. King
- Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
| | - Sean R. Notley
- Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
| | - Gary S. Goldfield
- Healthy Active Living and Obesity Research Group, Children’s Hospital of Eastern Ontario Research Institute, Ontario, Canada, Canada
| | - Naoto Fujii
- Faculty of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan
| | - Tatsuro Amano
- Laboratory for Exercise and Environmental Physiology, Faculty of Education, Niigata University, Niigata, Japan
| | - Glen P. Kenny
- Human and Environmental Physiology Research Unit, School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada, Canada
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ontario, Canada, Canada
| |
Collapse
|
8
|
Lee JKW, Tan B, Ogden HB, Chapman S, Sawka MN. Exertional heat stroke: nutritional considerations. Exp Physiol 2022; 107:1122-1135. [PMID: 35521757 PMCID: PMC9790308 DOI: 10.1113/ep090149] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/02/2022] [Indexed: 12/30/2022]
Abstract
NEW FINDINGS What is the topic of this review? The potential role of nutrition in exertional heat stroke. What advances does it highlight? Certain nutritional and dietary strategies used by athletes and workers may exert a protective effect the pathophysiological processes of exertional heat stroke, whereas others may be detrimental. While current evidence suggests that some of these practices may be leveraged as a potential countermeasure to exertional heat stroke, further research on injury-related outcomes in humans is required. ABSTRACT Exertional heat stroke (EHS) is a life-threatening illness and an enduring problem among athletes, military servicemen and -women, and occupational labourers who regularly perform strenuous activity, often under hot and humid conditions or when wearing personal protective equipment. Risk factors for EHS and mitigation strategies have generally focused on the environment, health status, clothing, heat acclimatization and aerobic conditioning, but the potential role of nutrition is largely underexplored. Various nutritional and dietary strategies have shown beneficial effects on exercise performance and health and are widely used by athletes and other physically active populations. There is also evidence that some of these practices may dampen the pathophysiological features of EHS, suggesting possible protection or abatement of injury severity. Promising candidates include carbohydrate ingestion, appropriate fluid intake and glutamine supplementation. Conversely, some nutritional factors and low energy availability may facilitate the development of EHS, and individuals should be cognizant of these. Therefore, the aims of this review are to present an overview of EHS along with its mechanisms and pathophysiology, discuss how selected nutritional considerations may influence EHS risk focusing on their impact on the key pathophysiological processes of EHS, and provide recommendations for future research. With climate change expected to increase EHS risk and incidence in the coming years, further investigation on how diet and nutrition may be optimized to protect against EHS would be highly beneficial.
Collapse
Affiliation(s)
- Jason K. W. Lee
- Human Potential Translational Research Program, Yong Loo Lin School of MedicineNational University of SingaporeSingapore,Heat Resilience and Performance Centre, Yong Loo Lin School of MedicineNational University of SingaporeSingapore,Department of Physiology, Yong Loo Lin School of MedicineNational University of SingaporeSingapore,N.1 Institute for HealthNational University of SingaporeSingapore,Global Asia InstituteNational University of SingaporeSingapore,Institute for Digital MedicineYong Loo Lin School of MedicineNational University of SingaporeSingapore,Singapore Institute for Clinical SciencesAgency for Science, Technology and Research (A*STAR)Singapore,Campus for Research Excellence and Technological Enterprise (CREATE)SingaporeSingapore
| | - Beverly Tan
- Human Potential Translational Research Program, Yong Loo Lin School of MedicineNational University of SingaporeSingapore,Campus for Research Excellence and Technological Enterprise (CREATE)SingaporeSingapore
| | - Henry B. Ogden
- Army Recruit Health and Performance ResearchHeadquarters of Army Recruiting and Initial Training Command, UpavonPewseyUK,Department of Sport, Health and WellbeingPlymouth Marjon UniversityPlymouthUK
| | - Shaun Chapman
- Army Recruit Health and Performance ResearchHeadquarters of Army Recruiting and Initial Training Command, UpavonPewseyUK,Cambridge Centre for Sport and Exercise SciencesSchool of Psychology and Sport ScienceAnglia Ruskin UniversityCambridgeUK
| | - Michael N. Sawka
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGAUSA
| |
Collapse
|
9
|
Reid MB. Redox Implications of Extreme Task Performance: The Case in Driver Athletes. Cells 2022; 11:cells11050899. [PMID: 35269521 PMCID: PMC8909750 DOI: 10.3390/cells11050899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/26/2022] [Accepted: 03/03/2022] [Indexed: 02/04/2023] Open
Abstract
Redox homeostasis and redox-mediated signaling mechanisms are fundamental elements of human biology. Physiological levels of reactive oxygen species (ROS) and reactive nitrogen species (RNS) modulate a range of functional processes at the cellular, tissue, and systemic levels in healthy humans. Conversely, excess ROS or RNS activity can disrupt function, impairing the performance of daily activities. This article analyzes the impact of redox mechanisms on extreme task performance. Such activities (a) require complex motor skills, (b) are physically demanding, (c) are performed in an extreme environment, (d) require high-level executive function, and (e) pose an imminent risk of injury or death. The current analysis utilizes race car driving as a representative example. The physiological challenges of this extreme task include physical exertion, g loading, vibration, heat exposure, dehydration, noise, mental demands, and emotional factors. Each of these challenges stimulates ROS signaling, RNS signaling, or both, alters redox homeostasis, and exerts pro-oxidant effects at either the tissue or systemic levels. These redox mechanisms appear to promote physiological stress during race car driving and impair the performance of driver athletes.
Collapse
Affiliation(s)
- Michael B Reid
- College of Health and Human Performance, University of Florida, Gainesville, FL 32611, USA
| |
Collapse
|
10
|
King KE, McCormick JJ, Notley SR, Fujii N, Kenny GP. Serum klotho concentrations in young and older men during prolonged exercise in temperate and hot conditions. Curr Aging Sci 2022; 15:180-185. [PMID: 35249521 DOI: 10.2174/1874609815666220304200939] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/07/2022] [Accepted: 12/14/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND The protein klotho protects cellular function during various physiological stressors, such as exercise, however it is unknown how the age-related decline in klotho production affects responses during exercise, especially in the heat. OBJECTIVE Our objective was to determine the effect of exercise in temperate and hot environmental conditions on serum klotho concentrations in young and older men. METHODS 12 young (mean ± SD: 22 ± 3 years) and 12 older (59 ± 4 years) men performed 180 minutes of moderate-intensity treadmill walking (metabolic rate: 200 W/m2) in a temperate [wet-bulb globe temperature (WBGT) 16°C, achieved with 21.9°C, 35% relative humidity (RH)] and hot (WBGT 32°C, achieved with 41.4°C, 35% RH) environment. Serum klotho was assessed before and after exercise, as well as 60-min post-exercise recovery in the respective environments. RESULTS Absolute klotho concentrations were greater in young versus older men during all measured time points in the temperate (p = 0.032), but not the hot condition (p = 0.064). In the hot condition, the change in serum klotho from baseline was significantly higher after exercise in the heat (mean ± SEM: +251 ± 73 pg/mL) than the temperate (+75 ± 57 pg/mL) environment in both groups (p = 0.026). However, this elevation was not maintained during recovery. CONCLUSION We showed that prolonged exercise in a temperate environment does not elicit a klotho response in either group. In contrast, despite lower resting klotho levels, the older men showed a similar exercise-induced increase in serum klotho response as their younger counterparts.
Collapse
Affiliation(s)
- Kelli E King
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - James J McCormick
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Sean R Notley
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| | - Naoto Fujii
- Faculty of Health and Sport Sciences, University of Tsukuba, Japan
| | - Glen P Kenny
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, Canada
| |
Collapse
|
11
|
The Role of Taurine in Skeletal Muscle Functioning and Its Potential as a Supportive Treatment for Duchenne Muscular Dystrophy. Metabolites 2022; 12:metabo12020193. [PMID: 35208266 PMCID: PMC8879184 DOI: 10.3390/metabo12020193] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 02/01/2023] Open
Abstract
Taurine (2-aminoethanesulfonic acid) is required for ensuring proper muscle functioning. Knockout of the taurine transporter in mice results in low taurine concentrations in the muscle and associates with myofiber necrosis and diminished exercise capacity. Interestingly, regulation of taurine and its transporter is altered in the mdx mouse, a model for Duchenne Muscular Dystrophy (DMD). DMD is a genetic disorder characterized by progressive muscle degeneration and weakness due to the absence of dystrophin from the muscle membrane, causing destabilization and contraction-induced muscle cell damage. This review explores the physiological role of taurine in skeletal muscle and the consequences of a disturbed balance in DMD. Its potential as a supportive treatment for DMD is also discussed. In addition to genetic correction, that is currently under development as a curative treatment, taurine supplementation has the potential to reduce muscle inflammation and improve muscle strength in patients.
Collapse
|
12
|
Exercise in the heat induces similar elevations in serum irisin in young and older men despite lower resting irisin concentrations in older adults. J Therm Biol 2022; 104:103189. [DOI: 10.1016/j.jtherbio.2022.103189] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 12/13/2021] [Accepted: 01/13/2022] [Indexed: 01/02/2023]
|
13
|
Garcia CK, Renteria LI, Leite-Santos G, Leon LR, Laitano O. Exertional heat stroke: pathophysiology and risk factors. BMJ MEDICINE 2022; 1:e000239. [PMID: 36936589 PMCID: PMC9978764 DOI: 10.1136/bmjmed-2022-000239] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 09/06/2022] [Indexed: 12/31/2022]
Abstract
Exertional heat stroke, the third leading cause of mortality in athletes during physical activity, is the most severe manifestation of exertional heat illnesses. Exertional heat stroke is characterised by central nervous system dysfunction in people with hyperthermia during physical activity and can be influenced by environmental factors such as heatwaves, which extend the incidence of exertional heat stroke beyond athletics only. Epidemiological data indicate mortality rates of about 27%, and survivors display long term negative health consequences ranging from neurological to cardiovascular dysfunction. The pathophysiology of exertional heat stroke involves thermoregulatory and cardiovascular overload, resulting in severe hyperthermia and subsequent multiorgan injury due to a systemic inflammatory response syndrome and coagulopathy. Research about risk factors for exertional heat stroke remains limited, but dehydration, sex differences, ageing, body composition, and previous illness are thought to increase risk. Immediate cooling remains the most effective treatment strategy. In this review, we provide an overview of the current literature emphasising the pathophysiology and risk factors of exertional heat stroke, highlighting gaps in knowledge with the objective to stimulate future research.
Collapse
Affiliation(s)
- Christian K Garcia
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Liliana I Renteria
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, FL, USA
| | - Gabriel Leite-Santos
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, FL, USA
| | - Lisa R Leon
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| | - Orlando Laitano
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA
| |
Collapse
|
14
|
Friesen CR, Uhrig EJ, Mason RT. Dehydrated males are less likely to dive into the mating pool. Behav Ecol 2021. [DOI: 10.1093/beheco/arab151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Abstract
The hydration state of animals vying for reproductive success may have implications for the tempo and mode of sexual selection, which may be salient in populations that experience increasing environmental fluctuations in water availability. Using red-sided garter snakes as a model system, we tested the effect of water supplementation on courtship, mating behavior, and copulatory plug (CP) production during a drought year. Over 3 days of mating trials, water-supplemented males (WET males, n = 45) outperformed a control group that was not supplemented with water (DRY males, n = 45). Over 70% of WET males mated but just 33% of DRY males did so. As a group, WET males mated 79 times versus 28 times by DRY males. On the last day of mating trials, over 70% of WET males were still courting, with 19 of them mating, whereas less than 25% of DRY males were courting and only one mated. CP deposition accounted for 4–6% of the mass lost by mating males, but hydration did not affect CP mass or water content. These findings suggest that, in years of low water availability, the number of courting males and the intensity of their courtship declines, thereby affecting sexual selection and conflict, at least within that year.
Collapse
Affiliation(s)
- Christopher R Friesen
- School of Earth, Atmospheric and Life Sciences, University of Wollongong, Building 35, Northfields Avenue, Wollongong, NSW 2522, Australia
- Department of Integrative Biology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA
- School of Life and Environmental Sciences, Bldg F22, Life Earth and Environmental Sciences (LEES) Building, The University of Sydney, Camperdown, NSW 2006, Australia
| | - Emily J Uhrig
- Department of Integrative Biology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA
- Center for Research on Sustainable Forests, University of Maine, 5755 Nutting Hall, Room 263, Orono, ME 04469, USA
| | - Robert T Mason
- Department of Integrative Biology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA
| |
Collapse
|
15
|
Jordan AC, Perry CGR, Cheng AJ. Promoting a pro-oxidant state in skeletal muscle: Potential dietary, environmental, and exercise interventions for enhancing endurance-training adaptations. Free Radic Biol Med 2021; 176:189-202. [PMID: 34560246 DOI: 10.1016/j.freeradbiomed.2021.09.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/06/2021] [Accepted: 09/16/2021] [Indexed: 12/17/2022]
Abstract
Accumulating evidence now shows that supplemental antioxidants including vitamin C, vitamin E and N-Acetylcysteine consumption can suppress adaptations to endurance-type exercise by attenuating reactive oxygen and nitrogen species (RONS) formation within skeletal muscle. This emerging evidence points to the importance of pro-oxidation as an important stimulus for endurance-training adaptations, including mitochondrial biogenesis, endogenous antioxidant production, insulin signalling, angiogenesis and growth factor signaling. Although sustained oxidative distress is associated with many chronic diseases, athletes have, on average, elevated levels of certain endogenous antioxidants to maintain redox homeostasis. As a result, trained athletes may have a better capacity to buffer oxidants during and after exercise, resulting in a reduced oxidative eustress stimulus for adaptations. Thus, higher levels of RONS input and exercise-induced oxidative stress may benefit athletes in the pursuit of continuous endurance training redox adaptations. This review addresses why athletes should be looking to enhance exercise-induced oxidative stress and how it can be accomplished. Methods covered include high-intensity interval training, hyperthermia and heat stress, dietary antioxidant restriction and modified antioxidant timing, dietary antioxidants and polyphenols as adjuncts to exercise, and vitamin C as a pro-oxidant.
Collapse
Affiliation(s)
- Adam C Jordan
- Muscle Health Research Centre, School of Kinesiology and Health Sciences, Faculty of Health, York University, M3J 1P3, Toronto, Canada
| | - Christopher G R Perry
- Muscle Health Research Centre, School of Kinesiology and Health Sciences, Faculty of Health, York University, M3J 1P3, Toronto, Canada
| | - Arthur J Cheng
- Muscle Health Research Centre, School of Kinesiology and Health Sciences, Faculty of Health, York University, M3J 1P3, Toronto, Canada.
| |
Collapse
|
16
|
Redox balance during exercise in the heat in healthy adults: A systematic review. J Therm Biol 2021; 99:102943. [PMID: 34420607 DOI: 10.1016/j.jtherbio.2021.102943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 03/30/2021] [Accepted: 03/30/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND Hyperthermia, induced by exercise in the heat, alters the redox status. The physiological significance of these observations remains uncertain but may justify why the consequences of exercising in the heat span from positive health adaptations to negative and even lethal outcomes. Here, we conducted a systematic review to investigate the redox responses during acute exercise in the heat in healthy adults. METHODS We searched MEDLINE, Cochrane Wiley, ClinicalTrials.gov, PEDRO and LILACS for clinical trials investigating pro- and antioxidant responses to exercise associated with hyperthermia and/or sweat-induced dehydration in healthy young individuals. Two independent reviewers extracted data and assessed the quality of the included studies. RESULTS A total of 1,014 records were selected, nine full papers were evaluated for eligibility, and eight studies met the inclusion criteria. Overall, results show that hyperthermia promotes oxidative stress both at the tissue level and in the circulation. Exercising in the heat heightens endogenous antioxidant defense systems, attenuating the negative effects of hyperthermia on oxidative damage. Studies also indicate that sweat-induced dehydration promotes oxidative stress, which is attenuated by rehydration. CONCLUSION These findings suggest that changes in redox status play a role in determining whether an acute bout of exercise in the heat lead to adaptive or maladaptive outcomes.
Collapse
|
17
|
Laitano O, Oki K, Leon LR. The Role of Skeletal Muscles in Exertional Heat Stroke Pathophysiology. Int J Sports Med 2021; 42:673-681. [PMID: 33772503 DOI: 10.1055/a-1400-9754] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The active participation of skeletal muscles is a unique characteristic of exertional heat stroke. Nevertheless, the only well-documented link between skeletal muscle activities and exertional heat stroke pathophysiology is the extensive muscle damage (e. g., rhabdomyolysis) and subsequent leakage of intramuscular content into the circulation of exertional heat stroke victims. Here, we will present and discuss rarely explored roles of skeletal muscles in the context of exertional heat stroke pathophysiology and recovery. This includes an overview of heat production that contributes to severe hyperthermia and the synthesis and secretion of bioactive molecules, such as cytokines, chemokines and acute phase proteins. These molecules can alter the overall inflammatory status from pro- to anti-inflammatory, affecting other organ systems and influencing recovery. The activation of innate immunity can determine whether a victim is ready to return to physical activity or experiences a prolonged convalescence. We also provide a brief discussion on whether heat acclimation can shift skeletal muscle secretory phenotype to prevent or aid recovery from exertional heat stroke. We conclude that skeletal muscles should be considered as a key organ system in exertional heat stroke pathophysiology.
Collapse
Affiliation(s)
- Orlando Laitano
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, United States
| | - Kentaro Oki
- Thermal & Mountain Medicine Devision, United States Army Research Institute of Environmental Medicine, Natick, United States
| | - Lisa R Leon
- Thermal & Mountain Medicine Devision, United States Army Research Institute of Environmental Medicine, Natick, United States
| |
Collapse
|
18
|
Taherkhani S, Suzuki K, Castell L. A Short Overview of Changes in Inflammatory Cytokines and Oxidative Stress in Response to Physical Activity and Antioxidant Supplementation. Antioxidants (Basel) 2020; 9:E886. [PMID: 32962110 PMCID: PMC7555806 DOI: 10.3390/antiox9090886] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/09/2020] [Accepted: 09/15/2020] [Indexed: 02/06/2023] Open
Abstract
Excessive release of inflammatory cytokines and oxidative stress (OS) are triggering factors in the onset of chronic diseases. One of the factors that can ensure health in humans is regular physical activity. This type of activity can enhance immune function and dramatically prevent the spread of the cytokine response and OS. However, if physical activity is done intensely at irregular intervals, it is not only unhealthy but can also lead to muscle damage, OS, and inflammation. In this review, the response of cytokines and OS to exercise is described. In addition, it is focused predominantly on the role of reactive oxygen and nitrogen species (RONS) generated from muscle metabolism and damage during exercise and on the modulatory effects of antioxidant supplements. Furthermore, the influence of factors such as age, sex, and type of exercise protocol (volume, duration, and intensity of training) is analyzed. The effect of antioxidant supplements on improving OS and inflammatory cytokines is somewhat ambiguous. More research is needed to understand this issue, considering in greater detail factors such as level of training, health status, age, sex, disease, and type of exercise protocol.
Collapse
Affiliation(s)
- Shima Taherkhani
- Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht 4199843653, Iran;
| | - Katsuhiko Suzuki
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa 359-1192, Japan
| | - Lindy Castell
- Green Templeton College, University of Oxford, Oxford OX2 6HG, UK
| |
Collapse
|
19
|
Beyond Heat Stress: Intestinal Integrity Disruption and Mechanism-Based Intervention Strategies. Nutrients 2020; 12:nu12030734. [PMID: 32168808 PMCID: PMC7146479 DOI: 10.3390/nu12030734] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 12/11/2022] Open
Abstract
The current climate changes have increased the prevalence and intensity of heat stress (HS) conditions. One of the initial consequences of HS is the impairment of the intestinal epithelial barrier integrity due to hyperthermia and hypoxia following blood repartition, which often results in a leaky gut followed by penetration and transfer of luminal antigens, endotoxins, and pathogenic bacteria. Under extreme conditions, HS may culminate in the onset of “heat stroke”, a potential lethal condition if remaining untreated. HS-induced alterations of the gastrointestinal epithelium, which is associated with a leaky gut, are due to cellular oxidative stress, disruption of intestinal integrity, and increased production of pro-inflammatory cytokines. This review summarizes the possible resilience mechanisms based on in vitro and in vivo data and the potential interventions with a group of nutritional supplements, which may increase the resilience to HS-induced intestinal integrity disruption and maintain intestinal homeostasis.
Collapse
|
20
|
McCormick JJ, Notley SR, Yardley JE, Sigal RJ, Kenny GP. Blunted circulating irisin in adults with type 1 diabetes during aerobic exercise in a hot environment: a pilot study. Appl Physiol Nutr Metab 2020; 45:679-682. [PMID: 32053388 DOI: 10.1139/apnm-2019-0624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Irisin is a novel myokine associated with increased metabolism, which may be upregulated in type 1 diabetes (T1D) during exercise-heat stress. We therefore assessed serum irisin production in young adults with and without T1D during incremental exercise in dry-heat (35 °C). The change in irisin during exercise was lower in individuals with compared with without T1D (-1.79 (SEM 25.68) vs. 59.74 (SEM 79.63) pg/mL; p = 0.024), indicating that irisin expression during exercise-heat stress is blunted in T1D. Novelty We show that, when assessed in young adults with and without T1D during exercise-heat stress, serum irisin production is blunted in T1D.
Collapse
Affiliation(s)
- James J McCormick
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Sean R Notley
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Jane E Yardley
- Augustana Faculty, University of Alberta, Camrose, AB T4V 2R3, Canada.,Alberta Diabetes Institute, Edmonton, AB, Canada.,Faculty of Kinesiology, Sport and Recreation, University of Alberta, AB, Canada
| | - Ronald J Sigal
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON K1N 6N5, Canada.,Departments of Medicine, Cardiac Sciences and Community Health Sciences, Faculties of Medicine and Kinesiology, University of Calgary, Calgary, AB T2T 5C7, Canada.,Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Glen P Kenny
- Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON K1N 6N5, Canada.,Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| |
Collapse
|
21
|
Bruchim Y, Aroch I, Nivy R, Baruch S, Abbas A, Frank I, Fishelson Y, Codner C, Horowitz M. Impacts of previous heatstroke history on physiological parameters eHSP72 and biomarkers of oxidative stress in military working dogs. Cell Stress Chaperones 2019; 24:937-946. [PMID: 31402428 PMCID: PMC6717235 DOI: 10.1007/s12192-019-01020-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/02/2019] [Accepted: 07/05/2019] [Indexed: 01/15/2023] Open
Abstract
Heatstroke (HS) is an acute, progressive life-threatening emergency. Animals, including military working dogs (IDFMWD), rapidly activate cytoprotective processes, e.g., heat shock proteins (HSPs) and antioxidative molecules, in response to heat stress. We hypothesized that serum HSPs (eHSP72) and oxidative stress markers would differ in IDFMWD with a history of HS compared with controls and thus could be used to detect susceptibility to recurrent HS. eHSPs concentration, oxidative stress markers, and systemic physiological parameters were studied in dogs with and without histories of HS, undergoing indoor or outdoor training. Treadmill physical performance tests (PPTs) were conducted indoors at 22 °C (groups C-I and HS-I) or outdoors under heat stress conditions of 36 °C; 60% humidity (groups C-O and HS-O). Pre-, immediately post-, and 45 min post-PPT heart rate (HR), respiratory rate, and rectal temperature (Tre) were recorded in all dogs. Likewise, blood samples were collected and eHSP72, venous blood gas analysis, and lactate and creatine kinase activity (CK) were assayed. Serum uric acid (sUA) and total serum redox potential (TRP) were measured only in the indoor group. Immediately post-PPT under both environmental conditions, Tre, HR, eHSP, sUA, and TRP (only measured in indoor PPT) significantly (P < 0.05) increased, whereas venous blood pH and bicarbonate decreased significantly (P < 0.05). Between groups comparisons demonstrated significant differences in basal HR and post-PPT Tre immediately after outdoor PPT. eHSP72 induction, CK, sUA, and serum TRP remained significantly higher in the HS group during post-PPT recovery. Taken together, animals with a history of HS have different results, and this signature of previous HS may predict altered heat sensitivity.
Collapse
Affiliation(s)
- Yaron Bruchim
- The Hebrew University Veterinary Teaching Hospital, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Laboratory of Environmental Physiology, Faculty of Dentistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Itamar Aroch
- The Hebrew University Veterinary Teaching Hospital, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ran Nivy
- The Hebrew University Veterinary Teaching Hospital, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Shelly Baruch
- The Hebrew University Veterinary Teaching Hospital, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Atallah Abbas
- Laboratory of Environmental Physiology, Faculty of Dentistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ilan Frank
- Israel Defense Force Military Working Dog Unit, Jerusalem, Israel
| | - Yuval Fishelson
- Israel Defense Force Military Working Dog Unit, Jerusalem, Israel
| | - Carolina Codner
- The Hebrew University Veterinary Teaching Hospital, Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Michal Horowitz
- Laboratory of Environmental Physiology, Faculty of Dentistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
| |
Collapse
|
22
|
Laitano O, Sheikh LH, Mattingly AJ, Murray KO, Ferreira LF, Clanton TL. Osmolality Selectively Offsets the Impact of Hyperthermia on Mouse Skeletal Muscle in vitro. Front Physiol 2018; 9:1496. [PMID: 30429796 PMCID: PMC6220237 DOI: 10.3389/fphys.2018.01496] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 10/03/2018] [Indexed: 11/24/2022] Open
Abstract
Hyperthermia and dehydration can occur during exercise in hot environments. Nevertheless, whether elevations in extracellular osmolality contributes to the increased skeletal muscle tension, sarcolemmal injury, and oxidative stress reported in warm climates remains unknown. We simulated osmotic and heat stress, in vitro, in mouse limb muscles with different fiber compositions. Extensor digitorum longus (EDL) and soleus (SOL) were dissected from 36 male C57BL6J and mounted at optimal length in tissue baths containing oxygenated buffer. Muscles were stimulated with non-fatiguing twitches for 30 min. Four experimental conditions were tested: isotonic-normothermia (285 mOsm•kg-1 and 35°C), hypertonic-normothermia (300 mOsm•kg-1 and 35°C), isotonic-hyperthermia (285 mOsm•kg-1 and 41°C), and hypertonic-hyperthermia (300 mOsm•kg-1 and 41°C). Passive tension was recorded continuously. The integrity of the sarcolemma was determined using a cell-impermeable fluorescent dye and immunoblots were used for detection of protein carbonyls. In EDL muscles, isotonic and hypertonic-hyperthermia increased resting tension (P < 0.001). Whereas isotonic-hyperthermia increased sarcolemmal injury in EDL (P < 0.001), this effect was absent in hypertonic-hyperthermia. Similarly, isotonic-hyperthermia elevated protein carbonyls (P = 0.018), a response not observed with hypertonic-hyperthermia. In SOL muscles, isotonic-hyperthermia also increases resting tension (P < 0.001); however, these effects were eliminated in hypertonic-hyperthermia. Unlike EDL, there were no effects of hyperthermia and/or hyperosmolality on sarcolemmal injury or protein carbonyls. Osmolality selectively modifies skeletal muscle response to hyperthermia in this model. Fast-glycolytic muscle appears particularly vulnerable to isotonic-hyperthermia, resulting in elevated muscle tension, sarcolemmal injury and protein oxidation; whereas slow-oxidative muscle exhibits increased tension but no injury or protein oxidation under the conditions and duration tested.
Collapse
Affiliation(s)
- Orlando Laitano
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
- Colegiado de Educação Física, Federal University of Vale do São Francisco, Petrolina, Brazil
| | - Laila H. Sheikh
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Alex J. Mattingly
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Kevin O. Murray
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Leonardo F. Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| | - Thomas L. Clanton
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, United States
| |
Collapse
|
23
|
Furtado ABV, Hartmann DD, Martins RP, Rosa PC, da Silva IK, Duarte BSL, Signori LU, Soares FAA, Puntel GO. Cryotherapy: biochemical alterations involved in reduction of damage induced by exhaustive exercise. ACTA ACUST UNITED AC 2018; 51:e7702. [PMID: 30304134 PMCID: PMC6172926 DOI: 10.1590/1414-431x20187702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 08/07/2018] [Indexed: 11/22/2022]
Abstract
When exercises are done in intense or exhaustive modes, several acute biochemical mechanisms are triggered. The use of cryotherapy as cold-water immersion is largely used to accelerate the process of muscular recovery based on its anti-inflammatory and analgesic properties. The present study aimed to study the biochemical effects of cold-water immersion treatment in mice submitted to exercise-induced exhaustion. Swiss albino mice were divided into 4 treatment groups: control, cold-water immersion (CWI), swimming exhaustive protocol (SEP), and SEP+CWI. Treatment groups were subdivided into times of analysis: 0, 1, 3, and 5 days. Exhaustion groups were submitted to one SEP session, and the CWI groups submitted to one immersion session (12 min at 12°C) every 24 h. Reactive species production, inflammatory, cell viability, and antioxidant status were assessed. The SEP+CWI group showed a decrease in inflammatory damage biomarkers, and reactive species production, and presented increased cell viability compared to the SEP group. Furthermore, CWI increased acetylcholinesterase activity in the first two sessions. The present study showed that CWI was an effective treatment after exercise-induced muscle damage. It enhanced anti-inflammatory response, decreased reactive species production, increased cell viability, and promoted redox balance, which could decrease the time for the recovery process.
Collapse
Affiliation(s)
- A B V Furtado
- Centro de Ciências da Saúde, Programa de Pós-graduação em Reabilitação Funcional, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - D D Hartmann
- Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - R P Martins
- Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - P C Rosa
- Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - I K da Silva
- Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - B S L Duarte
- Centro de Ciências da Saúde, Programa de Pós-graduação em Reabilitação Funcional, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - L U Signori
- Centro de Ciências da Saúde, Programa de Pós-graduação em Reabilitação Funcional, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - F A A Soares
- Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - G O Puntel
- Centro de Ciências da Saúde, Programa de Pós-graduação em Reabilitação Funcional, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil.,Centro de Ciências Naturais e Exatas, Programa de Pós-Graduação em Ciências Biológicas, Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil.,Centro de Ciências da Saúde, Departamento de Morfologia, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| |
Collapse
|
24
|
Sahin E, Madendag Y, Sahin ME, Col Madendag I, Karakukcu C, Acmaz G, Muderris II. Effect of severe hyperemesis gravidarum on maternal vascular endothelial health: evaluation of soluble adhesion molecules. J Matern Fetal Neonatal Med 2018; 33:385-389. [PMID: 29945479 DOI: 10.1080/14767058.2018.1494145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Purpose: This study aimed to clarify the effect of severe hyperemesis gravidarum (sHG) on maternal vascular endothelial health with evaluation of soluble adhesion molecules.Method: The study population consisted of two groups of pregnant participants between 18 and 35 years of age who were between 5 and 13 weeks of gestation: sHG group and a healthy control group. A group of 26 participants whose pregnancies were complicated by sHG was compared with 26 healthy participants regarding serum levels of the soluble adhesion molecules such as E-selectin, soluble intracellular cell adhesion molecule 1 (sICAM-1), and soluble vascular cell adhesion molecule one (sVCAM-1), as well as other biochemical markers. The two groups had similar baseline characteristics.Results: Maternal baseline characteristics were similar in both groups. Serum levels of E-selectin (p < .001), sICAM-1 (p < .001), and sVCAM-1 (p < .001) were higher in the sHG group compared with the control group. Higher blood urea nitrogen, creatinine, and sodium levels, serum osmolarity, and urine density (p < .001, < .001, .006, .041, and .001, respectively) were also observed in the sHG group compared with the control group.Conclusions: The findings of this study indicated that sHG could impact endothelial cell function and these changes represented hypovolemia and dehydration caused by severe vomiting. Large-scale studies are required to understand the clinical importance of this finding regarding the long-term consequences and underlying mechanisms of elevated sICAM-1, sVCAM-1, and sE-selectin synthesis.
Collapse
Affiliation(s)
- E Sahin
- Department of Obstetrics and Gynecology, Health Sciences University Sivas Sarkisla Government Hospital, Sivas, Turkey
| | - Y Madendag
- Department of Obstetrics and Gynecology, Health Sciences University Kayseri Education and Research Hospital, Kayseri, Turkey
| | - M Eraslan Sahin
- Department of Obstetrics and Gynecology, Health Sciences University Sivas Sarkisla Government Hospital, Sivas, Turkey
| | - I Col Madendag
- Department of Obstetrics and Gynecology, Health Sciences University Kayseri Education and Research Hospital, Kayseri, Turkey
| | - C Karakukcu
- Department of Biochemistry Clinic, Health Sciences University Kayseri Education and Research Hospital, Kayseri, Turkey
| | - G Acmaz
- Department of Obstetrics and Gynecology, Erciyes University Medicine Faculity, Kayseri, Turkey
| | - I I Muderris
- Department of Obstetrics and Gynecology, Erciyes University Medicine Faculity, Kayseri, Turkey
| |
Collapse
|
25
|
Hodges GJ, Kiviniemi AM, Mallette MM, Klentrou P, Falk B, Cheung SS. Effect of passive heat exposure on cardiac autonomic function in healthy children. Eur J Appl Physiol 2018; 118:2233-2240. [PMID: 30069604 DOI: 10.1007/s00421-018-3957-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 07/27/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE The aim of this study was to examine the effect of passive heat stress on heart rate variability parameters in healthy children. METHOD Fifteen children (9.3 ± 1.6 years) of both sexes (eight male) participated in two randomized experimental conditions separated by 5-12 days. Children were seated for 2 h in an environmental chamber for two sessions: neutral (22.4 ± 0.1 °C, 40.4 ± 6.5% RH) and hot (34.9 ± 0.3 °C, 36.6 ± 6.2% RH) conditions. Electrocardiogram, mean skin temperature, tympanic temperature, and blood pressure were recorded. Five min epochs were averaged for analysis of cardiac autonomic function over the 2-h protocol. RESULT Mean skin and tympanic temperatures and heart rate increased during the hot condition (all p < 0.01) while mean arterial pressure decreased (p < 0.01). During the hot condition, root-mean-square difference of successive normal RR intervals (45 ± 9 to 38 ± 7 ms), and low- (LF, 1536 ± 464 vs. 935 ± 154 ms2) and high-frequency power (HF, 1544 ± 693 vs. 866 ± 355 ms2) decreased, whereas LF/HF ratio increased (1.64 ± 0.24 vs. 2.40 ± 0.23 au); all indices were different from neutral (all p < 0.05). These were all unchanged throughout the neutral condition (all p > 0.05), except for LF/HF ratio which decreased during the neutral condition (p < 0.05). CONCLUSION Mild hyperthermia elicited marked changes in cardiac autonomic control in young children. These data suggest that, in healthy children, vagal withdrawal is responsible for the cardiac autonomic response to hyperthermia.
Collapse
Affiliation(s)
- Gary J Hodges
- Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada
| | - Antti M Kiviniemi
- Research Unit of Internal Medicine, Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Matthew M Mallette
- Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada
| | - Panagiota Klentrou
- Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada
- Centre for Bone and Muscle Health, Faculty of Applied Health Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Bareket Falk
- Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada
- Centre for Bone and Muscle Health, Faculty of Applied Health Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Stephen S Cheung
- Department of Kinesiology, Faculty of Applied Health Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON, L2S 3A1, Canada.
| |
Collapse
|
26
|
Hawley JA, Lundby C, Cotter JD, Burke LM. Maximizing Cellular Adaptation to Endurance Exercise in Skeletal Muscle. Cell Metab 2018; 27:962-976. [PMID: 29719234 DOI: 10.1016/j.cmet.2018.04.014] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The application of molecular techniques to exercise biology has provided novel insight into the complexity and breadth of intracellular signaling networks involved in response to endurance-based exercise. Here we discuss several strategies that have high uptake by athletes and, on mechanistic grounds, have the potential to promote cellular adaptation to endurance training in skeletal muscle. Such approaches are based on the underlying premise that imposing a greater metabolic load and provoking extreme perturbations in cellular homeostasis will augment acute exercise responses that, when repeated over months and years, will amplify training adaptation.
Collapse
Affiliation(s)
- John A Hawley
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia.
| | - Carsten Lundby
- Centre for Physical Activity Research, Copenhagen University Hospital, Copenhagen, Denmark
| | - James D Cotter
- School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand
| | - Louise M Burke
- Exercise and Nutrition Research Program, Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia; Department of Sport Nutrition, Australian Institute of Sport, Belconnen, ACT, Australia
| |
Collapse
|
27
|
Impact of Hot Environment on Fluid and Electrolyte Imbalance, Renal Damage, Hemolysis, and Immune Activation Postmarathon. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9824192. [PMID: 29430287 PMCID: PMC5753004 DOI: 10.1155/2017/9824192] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/09/2017] [Accepted: 10/26/2017] [Indexed: 01/24/2023]
Abstract
Previous studies have demonstrated the physiological changes induced by exercise exposure in hot environments. We investigated the hematological and oxidative changes and tissue damage induced by marathon race in different thermal conditions. Twenty-six male runners completed the São Paulo International Marathon both in hot environment (HE) and in temperate environment (TE). Blood and urine samples were collected 1 day before, immediately after, 1 day after, and 3 days after the marathon to analyze the hematological parameters, electrolytes, markers of tissue damage, and oxidative status. In both environments, the marathon race promotes fluid and electrolyte imbalance, hemolysis, oxidative stress, immune activation, and tissue damage. The marathon runner's performance was approximately 13.5% lower in HE compared to TE; however, in HE, our results demonstrated more pronounced fluid and electrolyte imbalance, renal damage, hemolysis, and immune activation. Moreover, oxidative stress induced by marathon in HE is presumed to be related to protein/purine oxidation instead of other oxidative sources. Fluid and electrolyte imbalance and protein/purine oxidation may be important factors responsible for hemolysis, renal damage, immune activation, and impaired performance after long-term exercise in HE. Nonetheless, we suggested that the impairment on performance in HE was not associated to the muscle damage and lipoperoxidation.
Collapse
|
28
|
Georgescu VP, de Souza Junior TP, Behrens C, Barros MP, Bueno CA, Utter AC, McAnulty LS, McAnulty SR. Effect of exercise-induced dehydration on circulatory markers of oxidative damage and antioxidant capacity. Appl Physiol Nutr Metab 2017; 42:694-699. [DOI: 10.1139/apnm-2016-0701] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Dehydration is a common event associated with exercise. However, few studies have examined the effects of dehydration on plasma redox status in humans. Eighty-two athletes were recruited and baseline anthropometrics and blood samples were obtained. Athletes then engaged in a dehydration protocol, training until 3% of preweight body mass was lost. Athletes returned to the lab and had postdehydration blood collected. Athletes then consumed an isotonic drink until pre-exercise body weight was reestablished. Blood was then recollected (1 h post full rehydration (PFR)). Samples were centrifuged and the plasma snap frozen in liquid nitrogen and stored at −80 °C. Lipid and protein oxidative stress was determined by measuring F2-isoprostanes and protein carbonyls (PC), respectively. Antioxidant capacity was determined by the ferric reducing ability of plasma (FRAP) and trolox equivalent antioxidant capacity (TEAC) assays. Plasma osmolality was determined using an osmometer. Statistical analysis utilized a 1-way ANOVA with posthoc testing. Values are reported as mean ± SD. Plasma osmolality was significantly elevated immediately postdehydration (p ≤ 0.001) but decreased to baseline at PFR. Plasma TEAC increased immediately postdehydration and at PFR (p ≤ 0.001). FRAP increased immediately postdehydration (p ≤ 0.001) and decreased to below baseline at PFR (p ≤ 0.05). Conversely, F2-isoprostanes declined significantly from baseline to immediately postdehydration and then significantly rose at PFR (p ≤ 0.001), whereas PC declined at PFR (p ≤ 0.01). This study indicates that dehydration and exercise cause a significant increase in plasma osmolality and antioxidant potential immediately postexercise. We propose dehydration significantly elevates antioxidant concentration which suppresses F2-isoprostanes and PC.
Collapse
Affiliation(s)
- Vincent P. Georgescu
- Department of Health and Exercise Science, Appalachian State University, 111 Rivers Street, Boone, NC USA
| | - Tacito P. de Souza Junior
- Department of Health and Exercise Science, Appalachian State University, 111 Rivers Street, Boone, NC USA
- Universidade Federal do Parana, Research Group on Metabolism, Nutrition, and Strength Training, Rua Coração de Maria, 92 - BR 116, Curitiba, Brazil
| | - Christian Behrens
- Department of Nutrition and Health Care Management, Appalachian State University, 261 Locust Street, Boone, NC USA
| | - Marcelo P. Barros
- Postgraduate program in Human Movement Sciences, Institute of Physical Activity and Sports Sciences (ICAFE), Cruzeiro do Sul University, Rua Coração de Maria, 192 - BR 16 Sao Paulo, Brazil
| | - Carlos Alves Bueno
- Universidade Federal do Parana, Research Group on Metabolism, Nutrition, and Strength Training, Rua Coração de Maria, 92 - BR 116, Curitiba, Brazil
| | - Alan C. Utter
- Department of Health and Exercise Science, Appalachian State University, 111 Rivers Street, Boone, NC USA
| | - Lisa S. McAnulty
- Department of Nutrition and Health Care Management, Appalachian State University, 261 Locust Street, Boone, NC USA
| | - Steven R. McAnulty
- Department of Health and Exercise Science, Appalachian State University, 111 Rivers Street, Boone, NC USA
| |
Collapse
|
29
|
Exercise-induced mitochondrial dysfunction: a myth or reality? Clin Sci (Lond) 2017; 130:1407-16. [PMID: 27389587 DOI: 10.1042/cs20160200] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 05/10/2016] [Indexed: 12/12/2022]
Abstract
Beneficial effects of physical activity on mitochondrial health are well substantiated in the scientific literature, with regular exercise improving mitochondrial quality and quantity in normal healthy population, and in cardiometabolic and neurodegenerative disorders and aging. However, several recent studies questioned this paradigm, suggesting that extremely heavy or exhaustive exercise fosters mitochondrial disturbances that could permanently damage its function in health and disease. Exercise-induced mitochondrial dysfunction (EIMD) might be a key proxy for negative outcomes of exhaustive exercise, being a pathophysiological substrate of heart abnormalities, chronic fatigue syndrome (CFS) or muscle degeneration. Here, we overview possible factors that mediate negative effects of exhaustive exercise on mitochondrial function and structure, and put forward alternative solutions for the management of EIMD.
Collapse
|
30
|
Souza Neto VLD, Silva RARD, Silva CDC, Negreiros RVD, Rocha CCT, Nóbrega MMLD. Proposal of nursing care plan in people hospitalized with AIDS. Rev Esc Enferm USP 2017; 51:e03204. [PMID: 28355316 DOI: 10.1590/s1980-220x2016027203204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 12/20/2016] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE to elaborate and validate a proposal for a nursing care plan in people hospitalized with AIDS, in an infectious disease unit, using ICNP® version 2015. METHODS A cross-sectional study, followed by validation of content, performed with 20 nurses and 120 people, living with AIDS in an infectious disease unit of a hospital of infectious diseases in Northeast Brazil. The methodological trajectory was carried out in the following stages: elaboration of the diagnosis, nursing outcomes; Initial proposal of nursing interventions; Preparation of a care plan; And validation of the plan by field experts. RESULTS 42 diagnoses were elaborated and validated, 33 presented CVI > 0.80 (55.42%) among field experts. From this quantitative, 228 interventions were elaborated and 41 obtained a CVI > 0.80 (44.78%), considered validated. CONCLUSION The study allowed us to identify and validate nursing diagnoses, outcomes and interventions for the use in clinical practice, aiming to subsidize the process of care for people with AIDS.
Collapse
|
31
|
|
32
|
Ferreira LF, Laitano O. Regulation of NADPH oxidases in skeletal muscle. Free Radic Biol Med 2016; 98:18-28. [PMID: 27184955 PMCID: PMC4975970 DOI: 10.1016/j.freeradbiomed.2016.05.011] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 03/31/2016] [Accepted: 05/12/2016] [Indexed: 12/20/2022]
Abstract
The only known function of NAD(P)H oxidases is to produce reactive oxygen species (ROS). Skeletal muscles express three isoforms of NAD(P)H oxidases (Nox1, Nox2, and Nox4) that have been identified as critical modulators of redox homeostasis. Nox2 acts as the main source of skeletal muscle ROS during contractions, participates in insulin signaling and glucose transport, and mediates the myocyte response to osmotic stress. Nox2 and Nox4 contribute to skeletal muscle abnormalities elicited by angiotensin II, muscular dystrophy, heart failure, and high fat diet. Our review addresses the expression and regulation of NAD(P)H oxidases with emphasis on aspects that are relevant to skeletal muscle. We also summarize: i) the most widely used NAD(P)H oxidases activity assays and inhibitors, and ii) studies that have defined Nox enzymes as protagonists of skeletal muscle redox homeostasis in a variety of health and disease conditions.
Collapse
Affiliation(s)
- Leonardo F Ferreira
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA.
| | - Orlando Laitano
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL, USA; Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| |
Collapse
|
33
|
Arnaoutis G, Kavouras SA, Stratakis N, Likka M, Mitrakou A, Papamichael C, Sidossis LS, Stamatelopoulos K. The effect of hypohydration on endothelial function in young healthy adults. Eur J Nutr 2016; 56:1211-1217. [PMID: 26864199 DOI: 10.1007/s00394-016-1170-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 01/29/2016] [Indexed: 11/25/2022]
Abstract
PURPOSE Hypohydration has been suggested as a predisposing factor for several pathologies including cardiovascular diseases (CVD). While CVD are the leading cause of death worldwide, no study has investigated whether acute hypohydration affects endothelial function and cardiovascular function. METHODS Ten young, healthy males participated in this crossover study (age: 24.3 ± 2.3 year; weight: 80.8 ± 5.3 kg; BMI: 24.3 ± 0.4 kg m-2). Each subject completed two measurements of endothelial function by flow-mediated dilation (FMD) in euhydrated and hypohydrated state separated by 24 h. Following baseline assessment of hydration status and FMD, the subjects completed 100 min of low-intensity intermittent walking exercise to achieve hypohydration of -2 % of individual body mass. For the rest of the day, a standardized, low water content diet was provided. The following morning, hydration markers and endothelial function were recorded. RESULTS Hypohydration by -1.9 ± 0.1 % of body mass resulted in decreased plasma volume by -3.5 ± 1.8 % and increased plasma osmolality by 9 ± 2 mmol kg-1 (P < 0.001). FMD as a response to hypohydration decreased by -26.8 ± 3.9 % (P < 0.05). CONCLUSION The data suggested that a small degree of hypohydration induced by moderate exercise and fluid restriction significantly impaired endothelial function.
Collapse
Affiliation(s)
- Giannis Arnaoutis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Stavros A Kavouras
- Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville, AR, 72701, USA.
| | - Nikolaos Stratakis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Marita Likka
- Vascular Laboratory, Department of Clinical Therapeutics, Alexandra University Hospital, Athens, Greece
| | - Asimina Mitrakou
- Vascular Laboratory, Department of Clinical Therapeutics, Alexandra University Hospital, Athens, Greece
| | - Christos Papamichael
- Vascular Laboratory, Department of Clinical Therapeutics, Alexandra University Hospital, Athens, Greece
| | - Labros S Sidossis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.,Department of Exercise Science and Sports Studies, Department of Medicine, Robert Wood Johnson Medical School, Rutgers University, New Jersey, USA
| | - Kimon Stamatelopoulos
- Vascular Laboratory, Department of Clinical Therapeutics, Alexandra University Hospital, Athens, Greece
| |
Collapse
|
34
|
Debevec T, Pialoux V, Ehrström S, Ribon A, Eiken O, Mekjavic IB, Millet GP. FemHab: The effects of bed rest and hypoxia on oxidative stress in healthy women. J Appl Physiol (1985) 2016; 120:930-8. [PMID: 26796757 DOI: 10.1152/japplphysiol.00919.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 01/15/2016] [Indexed: 12/17/2022] Open
Abstract
Independently, both inactivity and hypoxia augment oxidative stress. This study, part of the FemHab project, investigated the combined effects of bed rest-induced unloading and hypoxic exposure on oxidative stress and antioxidant status. Healthy, eumenorrheic women were randomly assigned to the following three 10-day experimental interventions: normoxic bed rest (NBR;n= 11; PiO2 = 133 mmHg), normobaric hypoxic bed rest (HBR;n= 12; PiO2 = 90 mmHg), and ambulatory hypoxic confinement (HAMB;n= 8: PiO2 = 90 mmHg). Plasma samples, obtained before (Pre), during (D2, D6), immediately after (Post) and 24 h after (Post+1) each intervention, were analyzed for oxidative stress markers [advanced oxidation protein products (AOPP), malondialdehyde (MDA), and nitrotyrosine], antioxidant status [superoxide dismutase (SOD), catalase, ferric-reducing antioxidant power (FRAP), glutathione peroxidase (GPX), and uric acid (UA)], NO metabolism end-products (NOx), and nitrites. Compared with baseline, AOPP increased in NBR and HBR on D2 (+14%; +12%;P< 0.05), D6 (+19%; +15%;P< 0.05), and Post (+22%; +21%;P< 0.05), respectively. MDA increased at Post+1 in NBR (+116%;P< 0.01) and D2 in HBR (+114%;P< 0.01) and HAMB (+95%;P< 0.05). Nitrotyrosine decreased (-45%;P< 0.05) and nitrites increased (+46%;P< 0.05) at Post+1 in HAMB only. Whereas SOD was higher at D6 (+82%) and Post+1 (+67%) in HAMB only, the catalase activity increased on D6 (128%) and Post (146%) in HBR and HAMB, respectively (P< 0.05). GPX was only reduced on D6 (-20%;P< 0.01) and Post (-18%;P< 0.05) in HBR. No differences were observed in FRAP and NOx. UA was higher at Post in HBR compared with HAMB (P< 0.05). These data indicate that exposure to combined inactivity and hypoxia impairs prooxidant/antioxidant balance in healthy women. Moreover, habitual activity levels, as opposed to inactivity, seem to blunt hypoxia-related oxidative stress via antioxidant system upregulation.
Collapse
Affiliation(s)
- Tadej Debevec
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia;
| | - Vincent Pialoux
- Center of Research and Innovation on Sports, University Claude Bernard Lyon 1, Villeurbanne, France
| | - Sabine Ehrström
- Center of Research and Innovation on Sports, University Claude Bernard Lyon 1, Villeurbanne, France
| | - Alexandra Ribon
- Center of Research and Innovation on Sports, University Claude Bernard Lyon 1, Villeurbanne, France
| | - Ola Eiken
- Department of Environmental Physiology, Swedish Aerospace Physiology Centre, Royal Institute of Technology, Stockholm, Sweden
| | - Igor B Mekjavic
- Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
| | - Grégoire P Millet
- ISSUL, Institute of Sport Sciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland; Department of Physiology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| |
Collapse
|
35
|
Souza-Silva AA, Moreira E, de Melo-Marins D, Schöler CM, de Bittencourt PIH, Laitano O. High intensity interval training in the heat enhances exercise-induced lipid peroxidation, but prevents protein oxidation in physically active men. Temperature (Austin) 2015; 3:167-75. [PMID: 27227083 PMCID: PMC4861192 DOI: 10.1080/23328940.2015.1132101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/09/2015] [Accepted: 12/10/2015] [Indexed: 11/05/2022] Open
Abstract
Aim. The purpose of this study was to determine the response of circulating markers of lipid and protein oxidation following an incremental test to exhaustion before and after 4 weeks of high-intensity interval training performed in the heat. Methods. To address this question, 16 physically active men (age = 23 ± 2 years; body mass = 73 ± 12 kg; height = 173 ± 6 cm; % body fat = 12.5 ± 6 %; body mass index = 24 ± 4 kg/m2) were allocated into 2 groups: control group (n = 8) performing high-intensity interval training at 22°C, 55% relative humidity and heat group (n = 8) training under 35°C, 55% relative humidity. Both groups performed high-intensity interval training 3 times per week for 4 consecutive weeks, accumulating a total of 12 training sessions. Before and after the completion of 4 weeks of high-intensity interval training, participants performed an incremental cycling test until exhaustion under temperate environment (22°C, 55% relative humidity) where blood samples were collected after the test for determination of exercise-induced changes in oxidative damage biomarkers (thiobarbituric acid reactive species and protein carbonyls). Results. When high-intensity interval training was performed under control conditions, there was an increase in protein carbonyls (p < 0.05) following the incremental test to exhaustion with no changes in thiobarbituric acid reactive species. Conversely, high-intensity interval training performed in high environmental temperature enhanced the incremental exercise-induced increases in thiobarbituric acid reactive species (p < 0.05) with no changes in protein carbonyls. Conclusion. In conclusion, 4 weeks of high-intensity interval training performed in the heat enhances exercise-induced lipid peroxidation, but prevents protein oxidation following a maximal incremental exercise in healthy active men.
Collapse
Affiliation(s)
- Ana Angélica Souza-Silva
- College of Physical Education, Federal University of Vale do São Francisco , Petrolina/PE, Brazil
| | - Eduardo Moreira
- College of Physical Education, Federal University of Vale do São Francisco , Petrolina/PE, Brazil
| | - Denise de Melo-Marins
- College of Physical Education, Federal University of Vale do São Francisco , Petrolina/PE, Brazil
| | - Cinthia M Schöler
- Department of Physiology, Federal University of Rio Grande do Sul , Porto Alegre/RS, Brazil
| | | | - Orlando Laitano
- College of Physical Education, Federal University of Vale do São Francisco , Petrolina/PE, Brazil
| |
Collapse
|