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https://www.readbyqxmd.com/read/28240714/effects-of-exercise-induced-dehydration-and-glycerol-rehydration-on-anaerobic-power-in-male-collegiate-wrestlers
#1
Zachary J McKenna, Trevor L Gillum
Wrestlers attempting to reach a specific weight class often use rapid weight loss (RWL). RWL is associated with high levels of dehydration, which may hinder athletic performance. Thus, there is a need for wrestlers to optimize re-hydration after achieving a specific weight. We sought to observe the effects of RWL on anaerobic power and the impact of glycerol on rehydration and power in male collegiate wrestlers (n=7, 19.75 ± 1.67 years, 76.8 ± 4.32 kg, 11.6 ± 4.32 % body fat, 59.9 ± 6.42 ml/kg/min). Subjects were assessed for body mass (BM), hydration, and mean power output (Wmean) before exercise (pre), immediately post (3% dehydrated), and 60 min post (rehydrated)...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28239998/effects-of-colostrum-serum-on-the-serotonergic-system-in-the-dorsal-raphe-nuclei-of-exercised-rats
#2
Seo JInhee, Kim Tae-Woon, Kim Chang-Ju
Purpose: The central fatigue hypothesis suggests that exhaustion, or the maximum level of exercise, induces excessive stress and increases serotonin concentrations in the brain, which in turn decreases central nervous system (CNS) function and induces fatigue. Our aim was to determine the effects of colostrum serum on the serotonergic system in the dorsal raphe nuclei during exhaustive exercise. Methods: Animals were randomly divided into five groups: control, exercise, exercise and treatment with 50, 100, and 200 mg/kg of colostrum serum...
February 24, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28239994/aortic-stenosis-in-dialysis-patients
#3
REVIEW
Yousif Ahmad, Michael F Bellamy, Christopher S R Baker
Aortic valve stenosis occurs 10-20 years earlier in patients on dialysis compared with the general population. This is likely related to the exposure of the valve to a milieu that predisposes to calcification as well as increased shear stress across the valve. Objective assessment of stenosis severity is largely made using echocardiography though accurate interpretation requires an understanding of the potential pitfalls of the technique and the influence of cardiac output upon the gradient measured across the valve...
February 26, 2017: Seminars in Dialysis
https://www.readbyqxmd.com/read/28239178/prevalence-and-characteristics-of-exercise-induced-bronchoconstriction-in-high-school-and-college-athletes-at-2-240-m-altitude
#4
Martín Becerril-Ángeles, Mario H Vargas, Leonardo Hernández-Pérez, Nancy Judith Rivera-Istepan, Rebeca Ivonne Pérez-Hidalgo, Ana Gabriela Ortega-González, Severino Rubio-Domínguez, María Cristina Rodríguez-Gutiérrez, Radamés Gaxiola-Cortés, Rodrigo Dosal-Ulloa, Laura Graciela Gochicoa-Rangel
BACKGROUND: Athletes practicing strenuous physical activities may develop exercise-induced bronchoconstriction (EIB). We aimed to determine the prevalence and features of this condition in Mexico City (altitude, 2,240 m). METHODS: In the present study, 208 high school and college athletes performed a standardized EIB test on a treadmill. RESULTS: Responses to exercise had large between-subject variability in all physiological parameters (forced expiratory volume in one second [FEV1], heart rate, blood oxygen saturation level [SpO2], blood pressure), with nearly similar proportions of subjects in whom FEV1 increased or decreased...
January 2017: Revista de Investigación Clínica; Organo del Hospital de Enfermedades de la Nutrición
https://www.readbyqxmd.com/read/28238588/rest-stress-limb-perfusion-imaging-in-humans-with-contrast-ultrasound-using-intermediate-power-imaging-and-microbubbles-resistant-to-inertial-cavitation
#5
Brian P Davidson, James Hodovan, J Todd Belcik, Federico Moccetti, Aris Xie, Azzdine Y Ammi, Jonathan R Lindner
BACKGROUND: Contrast-enhanced ultrasound (CEU) limb perfusion imaging is a promising approach for evaluating peripheral artery disease (PAD). However, low signal enhancement in skeletal muscle has necessitated high-power intermittent imaging algorithms, which are not clinically feasible. We hypothesized that CEU using a combination of intermediate power and a contrast agent resistant to inertial cavitation would allow real-time limb stress perfusion imaging. METHODS: In normal volunteers, CEU of the calf skeletal muscle was performed on separate days with Sonazoid, Optison, or Definity...
February 23, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28236311/laryngoscopy-during-swimming-a-novel-diagnostic-technique-to-characterize-swimming-induced-laryngeal-obstruction
#6
Emil S Walsted, Laura L Swanton, Ken van van Someren, Tessa E Morris, Matthew Furber, Vibeke Backer, James H Hull
Exercise-induced laryngeal obstruction (EILO) is a key differential diagnosis for respiratory symptoms in athletes and is particularly prevalent in aquatic athletes. A definitive diagnosis of EILO is dependent on laryngoscopy, performed continuously, while an athlete engages in the sport that precipitates their symptoms. This report provides the first description of the feasibility of performing continuous laryngoscopy during exercise in a swimming environment. The report describes the methodology and safety of the use of continuous laryngoscopy while swimming...
February 25, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28231325/cardiovascular-exercise-and-burden-of-arrhythmia-in-patients-with-atrial-fibrillation-a-randomized-controlled-trial
#7
Ane Katrine Skielboe, Thomas Quaade Bandholm, Stine Hakmann, Malene Mourier, Thomas Kallemose, Ulrik Dixen
BACKGROUND: Physical activity at moderate-high intensity is recommended to prevent lifestyle diseases. Patients with atrial fibrillation are at risk of a sedentary lifestyle due to fear of exercise-induced episodes of atrial fibrillation. The burden of arrhythmia can be reduced by physical exercise. The effect of exercise intensity on burden of atrial fibrillation needs to be studied further. METHODS AND RESULTS: In a 12-week randomized controlled trial, 76 patients with paroxysmal/persistent atrial fibrillation were allocated to perform exercise at either low intensity or high intensity (50% and 80% of maximal perceived exertion, respectively)...
2017: PloS One
https://www.readbyqxmd.com/read/28230531/exercise-induced-alterations-in-nk-cell-cytotoxicity-methodological-issues-and-future-perspectives
#8
Philipp Zimmer, Alexander Schenk, Markus Kieven, Michelle Holthaus, Jonas Lehmann, Lukas Lövenich, Wilhelm Bloch
With their ability to recognize and eliminate virus-infected and neoplastic cells, natural killer cells (NK-cells) represent an important part of the innate immune system. NK-cells have attracted the attention of exercise scientists for more than thirty years ago. To date, it is widely accepted that NK-cell counts in the peripheral blood are strongly influenced by acute exercise. Additionally, many studies reported effects of both, acute and chronic exercise on NK-cell cytotoxicity. However, these findings are contradictory...
2017: Exercise Immunology Review
https://www.readbyqxmd.com/read/28229572/coenzyme-q10-does-not-prevent-exercise-induced-muscle-damage-and-oxidative-stress-in-sedentary-men
#9
Nilsel Okudan, Muaz Belviranli, Savaş Torlak
BACKGROUND: The objective of this study was to examine the effects of coenzyme Q10 (CoQ10) supplementation on exercise-induced muscle damage and oxidative stress in sedentary young men. In this study, a total of twenty one sedentary and healthy young men participated. METHODS: Participants were assigned at random to a CoQ10 or a placebo group employing a double-blind method. Those in the CoQ10 group ingested 200 mg CoQ10 per day for 4 weeks. Those in the placebo group ingested the same dosage of a placebo...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28225537/laryngeal-sensitivity-testing-in-youth-with-exercise-inducible-laryngeal-obstruction
#10
Irena Hočevar-Boltežar, Uroš Krivec, Maja Šereg-Bahar
Exercise-inducible laryngeal obstruction (EILO) has been recognized as a not rare respiratory problem in youth practicing sports. The aim of the study was to test the mechanosensitivity of the larynx, and to identify the factors affecting it in a group of youth with proven EILO. Laryngeal sensory testing was performed in 54 adolescents and young adults with EILO. Laryngeal mucosal alterations were assessed according to the Reflux Finding Score (RFS). The data concerning diseases possibly affecting the upper airway, findings of previously performed flexible videolaryngoscopy during exercise, and RFS score were compared between the participants with laryngeal hyposensitivity and those with normal sensitivity...
February 20, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28225205/greater-endurance-capacity-and-improved-dyspnoea-with-acute-oxygen-supplementation-in-idiopathic-pulmonary-fibrosis-patients-without-resting-hypoxaemia
#11
Leona M Dowman, Christine F McDonald, Steven Bozinovski, Ross Vlahos, Rebecca Gillies, Dodie Pouniotis, Catherine J Hill, Nicole S L Goh, Anne E Holland
BACKGROUND AND OBJECTIVE: Supplemental oxygen is commonly prescribed in patients with idiopathic pulmonary fibrosis (IPF), although its benefits have not been proven. The aims of this study were to investigate the effect of oxygen on oxidative stress, cytokine production, skeletal muscle metabolism and physiological response to exercise in IPF. METHODS: Eleven participants with IPF received either oxygen, at an FiO2 of 0.50, or compressed air for 1 h at rest and during a cycle endurance test at 85% of peak work rate...
February 22, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28224104/exertional-rhabdomyolysis-and-heat-stroke-beware-of-volatile-anesthetic-sedation
#12
REVIEW
Karel Heytens, Jan De Bleecker, Walter Verbrugghe, Jonathan Baets, Luc Heytens
In view of the enormous popularity of mass sporting events such as half-marathons, the number of patients with exertional rhabdomyolysis or exercise-induced heat stroke admitted to intensive care units (ICUs) has increased over the last decade. Because these patients have been reported to be at risk for malignant hyperthermia during general anesthesia, the intensive care community should bear in mind that the same risk of life-threatening rhabdomyolysis is present when these patients are admitted to an ICU, and volatile anesthetic sedation is chosen as the sedative technique...
February 4, 2017: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28223939/no-influence-of-transcutaneous-electrical-nerve-stimulation-on-exercise-induced-pain-and-5-km-cycling-time-trial-performance
#13
Andrew W Hibbert, François Billaut, Matthew C Varley, Remco C J Polman
Introduction: Afferent information from exercising muscle contributes to the sensation of exercise-induced muscle pain. Transcutaneous electrical nerve stimulation (TENS) delivers low-voltage electrical currents to the skin, inhibiting nociceptive afferent information. The use of TENS in reducing perceptions of exercise-induced pain has not yet been fully explored. This study aimed to investigate the effect of TENS on exercise-induced muscle pain, pacing strategy, and performance during a 5-km cycling time trial (TT)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28222051/the-difference-between-exercise-induced-autonomic-and-fitness-changes-measured-after-12-weeks-and-20-weeks-of-medium-to-high-intensity-military-training-erratum
#14
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28218814/mr-elastography-measurement-of-the-effect-of-passive-warmup-prior-to-eccentric-exercise-on-thigh-muscle-mechanical-properties
#15
Paul Kennedy, Lewis J Macgregor, Eric Barnhill, Curtis L Johnson, Michael Perrins, Angus Hunter, Colin Brown, Edwin J R van Beek, Neil Roberts
PURPOSE: To investigate the effect of warmup by application of the thermal agent Deep Heat (DH) on muscle mechanical properties using magnetic resonance elastography (MRE) at 3T before and after exercise-induced muscle damage (EIMD). MATERIALS AND METHODS: Twenty male participants performed an individualized protocol designed to induce EIMD in the quadriceps. DH was applied to the thigh in 50% of the participants before exercise. MRE, T2 -weighted MRI, maximal voluntary contraction (MVC), creatine kinase (CK) concentration, and muscle soreness were measured before and after the protocol to assess EIMD effects...
February 20, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28218471/%C3%AE-4%C3%AE-%C3%AE-gabaa-receptors-in-dorsal-hippocampal-ca1-of-adolescent-female-rats-traffic-to-the-plasma-membrane-of-dendritic-spines-following-voluntary-exercise-and-contribute-to-protection-of-animals-from-activity-based-anorexia-through-localization-at-excitatory
#16
Chiye Aoki, Yi-Wen Chen, Tara Gunkali Chowdhury, Walter Piper
In hippocampal CA1 of adolescent female rodents, α4βδ-GABAA receptors (α4βδ-GABAA Rs) suppress excitability of pyramidal neurons through shunting inhibition at excitatory synapses. This contributes to anxiolysis of stressed animals. Socially isolated adolescent female rats with 8 days of wheel access, the last 4 days of which entail restricted food access, have been shown to exhibit excessive exercise, choosing to run instead of eat (activity-based anorexia [ABA]). Upregulation of α4βδ-GABAA Rs in the dorsal hippocampal CA1 (DH), seen among some ABA animals, correlates with suppression of excessive exercise...
February 20, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28217027/adenosine-stress-induced-left-bundle-branch-block-during-technetium-99m-tetrofosmin-myocardial-perfusion-imaging
#17
Mohan Roop Jayanthi, Arun Sasikumar, Arun Kumar Reddy Gorla, Ashwani Sood, Anish Bhattacharya, Bhagwant Rai Mittal
The occurrence of left bundle branch block (LBBB) in electrocardiogram during exercise testing is a relatively rare finding. The incidence of LBBB during exercise testing ranges from 0.5% to 1.1%. The mechanism of exercise-induced LBBB (EI-LBBB) is poorly understood, but ischemia is a proposed etiology. Stress myocardial perfusion imaging (MPI) can be useful in patients with EI-LBBB to rule out coronary artery disease. Adenosine vasodilator stress is the preferred mode of stress in patients with LBBB for performing stress-MPI...
January 2017: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28215415/diagnostic-and-prognostic-value-of-lead-avr-during-exercise-testing-in-patients-suspected-of-having-myocardial-ischemia
#18
Max Wagener, Roger Abächerli, Ursina Honegger, Nicolas Schaerli, Gil Prêtre, Raphael Twerenbold, Christian Puelacher, Germaine Sunier, Philipp Reddiess, Maria Rubini Gimenez, Karin Wildi, Jasper Boeddinghaus, Thomas Nestelberger, Patrick Badertscher, Zaid Sabti, Ramun Schmid, Remo Leber, Dayana Flores Widmer, Samyut Shrestha, Ivo Strebel, Damian Wild, Stefan Osswald, Michael Zellweger, Christian Mueller, Tobias Reichlin
We aimed to assess the diagnostic and prognostic value of ST-segment deviation in aVR, a lead often ignored in clinical practice, during exercise testing and to compare it to the most widely used criterion of ST-segment depression in V5. We enrolled 1,596 patients with suspected myocardial ischemia referred for nuclear perfusion imaging undergoing bicycle stress testing. ST-segment amplitudes in leads aVR and V5 were automatically measured. The presence of inducible myocardial ischemia was the diagnostic end point and adjudicated based on nuclear perfusion imaging and coronary angiography...
January 5, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28214133/dynamic-hyperinflation-in-patients-with-asthma-and-exercise-induced-bronchoconstriction
#19
Olga Mediano, Raquel Casitas, Carlos Villasante, Elisabet Martínez-Cerón, Raúl Galera, Ester Zamarrón, Francisco García-Río
BACKGROUND: Little is known about the behavior of operative lung volumes during exercise in patients with asthma and exercise-induced bronchoconstriction (EIB). OBJECTIVES: To compare the presence of dynamic hyperinflation (DH) in patients with mild asthma with and without EIB and in healthy individuals and to relate the changes in end-expiratory lung volume (EELV) with postexercise airflow reduction. METHODS: A total of 122 consecutive stable patients (>12 years of age) with mild asthma and 38 controls were studied...
February 14, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28213823/long-term-resistance-exercise-induced-muscular-hypertrophy-is-associated-with-autophagy-modulation-in-rats
#20
Insu Kwon, Yongchul Jang, Joon-Yong Cho, Young C Jang, Youngil Lee
Elevation of anabolism and concurrent suppression of catabolism are critical metabolic adaptations for muscular hypertrophy in response to resistance exercise (RE). Here, we investigated if RE-induced muscular hypertrophy is acquired by modulating a critical catabolic process autophagy. Male Wistar Hannover rats (14 weeks old) were randomly assigned to either sedentary control (SC, n = 10) or resistance exercise (RE, n = 10). RE elicited significant hypertrophy of flexor digitorum profundus (FDP) muscles in parallel with enhancement in anabolic signaling pathways (phosphorylation of AKT, mTOR, and p70S6K)...
February 17, 2017: Journal of Physiological Sciences: JPS
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