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https://www.readbyqxmd.com/read/27918851/influence-of-a-100-m-simulated-in-water-rescue-on-cardiopulmonary-parameters
#1
Ana Sousa, Ricardo J Fernandes, Núria Rodríguez, J Arturo Abraldes
OBJECTIVE: Cardiopulmonary resuscitation (CPR) after a drowning episode is performed under fatigue conditions. However, the characterization of CPR in this context is still unknown. Our purpose was to investigate the effect of a 100-m simulated in-water rescue on CPR and physiological parameters in trained certified lifeguards. METHODS: Thirty trained certified lifeguards (age 24.6 ± 3.8 yrs; height 178.2 ± 7.4 cm and weight 76.9 ± 10.6 kg) completed two protocols using an adult manikin: (i) 4-min CPR after 4-min baseline conditions (CPR), and (ii) 4-min CPR after a 100-m simulated in-water rescue in the sea (CPR Rescue), both with a compression-ventilation ratio of 30:2...
December 5, 2016: Prehospital Emergency Care
https://www.readbyqxmd.com/read/27918666/quantification-of-training-and-competition-loads-in-endurance-sports-methods-and-applications
#2
Iñigo Mujika
Training quantification is basic to evaluate an endurance athlete's responses to the training loads, ensure adequate stress/recovery balance and determine the relationship between training and performance. Quantifying both external and internal workload is important, because the external workload does not measure the biological stress imposed by the exercise sessions. Generally used quantification methods include retrospective questionnaires, diaries, direct observation and physiological monitoring, often based on the measurement of oxygen uptake, heart rate and blood lactate concentration...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27916646/roles-of-peroxisome-proliferator-activated-receptor-%C3%AE-%C3%AE-in-skeletal-muscle-physiology
#3
REVIEW
Ravikumar Manickam, Walter Wahli
More than two decades of studying peroxisome proliferator-activated receptors (PPARs) has led to an understanding of their implications in various physiological processes that are key for health and disease. All three PPAR isotypes, PPARα, PPARβ/δ, and PPARγ, are activated by a variety of molecules, including fatty acids, eicosanoids and phospholipids, and regulate a spectrum of genes involved in development, lipid and carbohydrate metabolism, inflammation, and proliferation and differentiation of many cell types in different tissues...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916643/homeostatic-effects-of-exercise-and-sleep-on-metabolic-processes-in-mice-with-an-overexpressed-skeletal-muscle-clock
#4
Allison J Brager, Lydia Heemstra, Raman Bhambra, J Christopher Ehlen, Karyn A Esser, Ketema N Paul, Colleen M Novak
Brain and muscle-ARNT-like factor (Bmal1/BMAL1) is an essential transcriptional/translational factor of circadian clocks. Loss of function of Bmal1/BMAL1 is highly disruptive to physiological and behavioral processes. In light of these previous findings, we examined if transgenic overexpression of Bmal1/BMAL1 in skeletal muscle could alter metabolic processes. First, we characterized in vivo and ex vivo metabolic phenotypes of muscle overexpressed mice (male and female) compared to wild-type littermates (WT)...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916427/tea-cocoa-coffee-and-affective-disorders-vicious-or-virtuous-cycle
#5
REVIEW
Tatiana García-Blanco, Alberto Dávalos, Francesco Visioli
BACKGROUND: The prevalence of psychiatric disorders is increasing worldwide, which underscores the importance of increasing research in this field, in terms of better detection, prevention based on improvement of lifestyle and diet, and effectiveness of treatment. Increasing evidence suggest that diet and exercise can affect proper neuronal development and physiology and protect the brain from neurological illnesses or injuries. Of note, cocoa, tea, and coffee are being actively investigated because they are rich in (poly)phenolic compounds that can modulate mental health, namely brain plasticity, behavior, mood, depression, and cognition...
November 25, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27915146/differential-sensitivity-to-cadmium-of-immunomarkers-measured-in-hemocyte-subpopulations-of-zebra-mussel-dreissena-polymorpha
#6
Lauris Evariste, Damien Rioult, Pauline Brousseau, Alain Geffard, Elise David, Michel Auffret, Michel Fournier, Stéphane Betoulle
Increasing discharge of industrial wastes into the environment results in pollution transfer towards hydrosystems. These activities release heavy metals such as cadmium, known as persistent pollutant that is accumulated by molluscs and exercise immunotoxicological effects. Among molluscs, the zebra mussel, Dreissena polymorpha constitutes a suitable support for freshwater ecotoxicological studies. In molluscs, homeostasis maintain is ensured in part by hemocytes that are composed of several cell populations involved in multiple physiological processes such as cell-mediated immune response or metal metabolism...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27912936/effects-of-mind-body-exercises-on-the-physiological-and-psychosocial-well-being-of-individuals-with-parkinson-s-disease-a-systematic-review-and-meta-analysis
#7
REVIEW
JoJo Yan Yan Kwok, Kai Chow Choi, Helen Yue Lai Chan
OBJECTIVES: The effects of mind-body exercises on individuals with chronic illnesses have attracted increasing attention. However, little effort had been made to systematically review the effects of these mind-body exercises on individuals with Parkinson's disease (PD). This review aimed to appraise the current evidence of the effects of mind-body exercises on the physiological and psychological outcomes for the PD population. DESIGN: Systematic review and meta-analysis of randomized controlled trials...
December 2016: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/27909231/influence-of-dietary-nitrate-supplementation-on-physiological-and-muscle-metabolic-adaptations-to-sprint-interval-training
#8
Christopher Thompson, Lee J Wylie, Jamie R Blackwell, Jonathan Fulford, Matthew I Black, James Kelly, Sinead T J McDonagh, James Carter, Stephen J Bailey, Anni Vanhatalo, Andrew M Jones
We hypothesized that 4 weeks of dietary nitrate supplementation would enhance exercise performance and muscle metabolic adaptations to sprint interval training (SIT). Thirty six recreationally-active subjects, matched on key variables at baseline, completed a series of exercise tests before and following a 4 week period in which they were allocated to one of the following groups: 1) SIT and NO3(-)-depleted beetroot juice as a placebo (SIT+PL); 2) SIT and NO3(-)-rich beetroot juice (~13mmol NO3(-)/day; SIT+BR); or 3) no training and NO3(-)-rich beetroot juice (NT+BR)...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27909225/recovery-of-the-immune-system-after-exercise
#9
Jonathan M Peake, Oliver Neubauer, Neil P Walsh, Richard J Simpson
The notion that prolonged, intense exercise causes an 'open window' of immunodepression during recovery after exercise is well accepted. Repeated exercise bouts or intensified training without sufficient recovery may increase the risk of illness. However, except for salivary IgA, clear and consistent markers of this immunodepression remain elusive. Exercise increases circulating neutrophil and monocyte counts, and reduces circulating lymphocyte count during recovery. This lymphopenia results from preferential egress of lymphocyte subtypes with potent effector functions (e...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27909028/teaching-about-water-relations-in-plant-cells-an-uneasy-struggle
#10
Lilianna Malińska, Eliza Rybska, Ewa Sobieszczuk-Nowicka, Małgorzata Adamiec
University students often struggle to understand the role of water in plant cells. In particular, osmosis and plasmolysis appear to be challenging topics. This study attempted to identify student difficulties (including misconceptions) concerning osmosis and plasmolysis and examined to what extent the difficulties could be revised during a plant physiology course. A questionnaire was developed to monitor university students' conceptual knowledge before and after a course, and both qualitative and quantitative data were obtained...
2016: CBE Life Sciences Education
https://www.readbyqxmd.com/read/27908565/determinants-of-hyperhomocysteinemia-in-healthy-and-hypertensive-subjects-a-population-based-study-and-systematic-review
#11
REVIEW
Liyuan Han, Yanfen Liu, Changyi Wang, Linlin Tang, Xiaoqi Feng, Thomas Astell-Burt, Qi Wen, Donghui Duan, Nanjia Lu, Guodong Xu, Kaiyue Wang, Lu Zhang, Kaibo Gu, Sihan Chen, Jianping Ma, Tao Zhang, Dingyun You, Shiwei Duan
AIMS: Hyperhomocysteinemia (HHcy) is known to increase the risk of many diseases. Factors influencing HHcy in healthy and hypertensive subjects remain under-researched. METHODS: A large population-based study was conducted in 60 communities from Shenzhen, China. Responses to standardized questions on lifestyle factors and blood samples were collected from all participants after a 12-h overnight fast. Multiple linear and multivariate logistic regressions were used to explore risk factors for HHcy...
November 19, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27905293/long-term-exercise-in-mice-has-sex-dependent-benefits-on-body-composition-and-metabolism-during-aging
#12
Rachel C McMullan, Scott A Kelly, Kunjie Hua, Brian K Buckley, James E Faber, Fernando Pardo-Manuel de Villena, Daniel Pomp
Aging is associated with declining exercise and unhealthy changes in body composition. Exercise ameliorates certain adverse age-related physiological changes and protects against many chronic diseases. Despite these benefits, willingness to exercise and physiological responses to exercise vary widely, and long-term exercise and its benefits are difficult and costly to measure in humans. Furthermore, physiological effects of aging in humans are confounded with changes in lifestyle and environment. We used C57BL/6J mice to examine long-term patterns of exercise during aging and its physiological effects in a well-controlled environment...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27903779/exercise-physiology-and-sports-science-must-be-considered-in-evolutionary-theories-regarding-human-performance-a-reply-to-postma-2016
#13
James M Smoliga, Gerald S Zavorsky
No abstract text is available yet for this article.
November 2016: Biology Letters
https://www.readbyqxmd.com/read/27903669/exertional-dyspnoea-in-obesity
#14
Vipa Bernhardt, Tony G Babb
The purpose of cardiopulmonary exercise testing (CPET) in the obese person, as in any cardiopulmonary exercise test, is to determine the patient's exercise tolerance, and to help identify and/or distinguish between the various physiological factors that could contribute to exercise intolerance. Unexplained dyspnoea on exertion is a common reason for CPET, but it is an extremely complex symptom to explain. Sometimes obesity is the simple answer by elimination of other possibilities. Thus, distinguishing among multiple clinical causes for exertional dyspnoea depends on the ability to eliminate possibilities while recognising response patterns that are unique to the obese patient...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/27903627/the-role-of-the-antioxidant-system-during-intense-endurance-exercise-lessons-from-migrating-birds
#15
REVIEW
Clara Cooper-Mullin, Scott R McWilliams
During migration, birds substantially increase their metabolic rate and burn fats as fuel and yet somehow avoid succumbing to overwhelming oxidative damage. The physiological means by which vertebrates such as migrating birds can counteract an increased production of reactive species (RS) are rather limited: they can upregulate their endogenous antioxidant system and/or consume dietary antioxidants (prophylactically or therapeutically). Thus, birds can alter different components of their antioxidant system to respond to the demands of long-duration flights, but much remains to be discovered about the complexities of RS production and antioxidant protection throughout migration...
December 1, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27901338/determinant-factors-of-peak-treadmill-speed-in-physically-active-men
#16
Leonardo Alves Pasqua, Mayara V Damasceno, Salomão Bueno, Alessandro M Zagatto, Gustavo G DE Araújo, Adriano E Lima-Silva, Rômulo Bertuzzi
BACKGROUND: The aim of the present study was to determine whether physiological factors and maximal dynamic strength are able to determine the peak treadmill speed (PTS) in physically active individuals. METHODS: One hundred and fifty physically active healthy males voluntarily visit the laboratory on three separate occasions and underwent the following activities: first visit: IPAQ (short version), anthropometric measurements, and a maximal incremental test performed for physiological variables (maximal oxygen uptake ( ) and respiratory compensation point (RCP); second visit: constant speed test for running economy (RE) measurement, and familiarization with the maximum dynamic strength (1RM) test in the leg press exercise; third visit: 1RM test...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27901314/effects-of-hypoxia-and-hypercapnic-hypoxia-on-oxygen-transport-and-acid-base-status-in-the-atlantic-blue-crab-callinectes-sapidus-during-exercise
#17
Mark P Lehtonen, Louis E Burnett
The responses of estuarine invertebrates to hypoxic conditions are well established. However, many studies have investigated hypoxia as an isolated condition despite its frequent co-occurrence with hypercapnia (elevated CO2 ). Although many studies suggest deleterious effects, hypercapnia has been observed to improve blue crab walking performance in hypoxia. To investigate the physiological effects of combined hypercapnic hypoxia, we measured Po2 , pH, [l-lactate], Pco2 , and total O2 in pre- and postbranchial hemolymph sampled from blue crabs during walking exercise...
November 30, 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/27900193/exertional-rhabdomyolysis-physiological-response-or-manifestation-of-an-underlying-myopathy
#18
Renata S Scalco, Marc Snoeck, Ros Quinlivan, Susan Treves, Pascal Laforét, Heinz Jungbluth, Nicol C Voermans
Exertional rhabdomyolysis is characterised by muscle breakdown associated with strenuous exercise or normal exercise under extreme circumstances. Key features are severe muscle pain and sudden transient elevation of serum creatine kinase (CK) levels with or without associated myoglobinuria. Mild cases may remain unnoticed or undiagnosed. Exertional rhabdomyolysis is well described among athletes and military personnel, but may occur in anybody exposed to unaccustomed exercise. In contrast, exertional rhabdomyolysis may be the first manifestation of a genetic muscle disease that lowers the exercise threshold for developing muscle breakdown...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27900151/can-the-otago-falls-prevention-program-be-delivered-by-video-a-feasibility-study
#19
Jennifer C Davis, Chun Liang Hsu, Winnie Cheung, Penny M A Brasher, Linda C Li, Karim M Khan, Jonathan Sykes, Dawn A Skelton, Teresa Liu-Ambrose
OBJECTIVES: We assessed the feasibility of delivering the Otago Exercise Programme (OEP) via an interactive DVD (ie, OEP-DVD) in combination with monthly physical therapist phone calls to older adults. DESIGN: This pre-post (baseline and 6-month follow-up) study included an intervention group (n=61) based in a rural location and a control group (n=21) based in a city. SETTING: Sechelt and Vancouver, British Columbia. PARTICIPANTS: 82 community-dwelling adults ≥75 years...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27900150/sex-differences-in-the-effects-of-12%C3%A2-weeks-sprint-interval-training-on-body-fat-mass-and-the-rates-of-fatty-acid-oxidation-and-vo2max-during-exercise
#20
Liam Bagley, Mark Slevin, Steven Bradburn, Donghui Liu, Chris Murgatroyd, George Morrissey, Michael Carroll, Mathew Piasecki, William S Gilmore, Jamie S McPhee
BACKGROUND: The purpose of this study was to examine whether very short duration, very high intensity sprint interval training (SIT) leads to loss of body fat mass in association with improvements to VO2max and fatty acid oxidation, and to assess the extent of sex dimorphism in these physiological responses. METHODS: A total of 24 men and 17 women (mean (SEM) age: 39 (±2) years; body mass index 24.6 (0.6)) completed measurements of the maximal rate of oxygen uptake (VO2max) and fatty acid oxidation (FATmax)...
2016: BMJ Open Sport & Exercise Medicine
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