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Cold water immersion

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https://www.readbyqxmd.com/read/28342769/a-laboratory-study-on-attentional-bias-as-an-underlying-mechanism-affecting-the-link-between-cortisol-and-performance-leading-to-a-discussion-on-the-nature-of-the-stressor-artificial-vs-psychosocial
#1
Franziska Lautenbach
Although cortisol is assumed to influence performance by affecting cognition during stressful and competitive situations, to date this assumption has not been tested empirically. Therefore, the aim of this study was to investigate whether the influence of cortisol on performance is mediated by attentional processing of emotional information. Forty-six male golfers were tested in a mixed design. The cold pressor task (CPT) was used to artificially increase cortisol levels in the experimental group relative to the control group, who had to put their forearm in warm water...
March 22, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28321017/a-non-invasive-technique-for-the-evaluation-of-peripheral-circulatory-functions-in-female-subjects-with-raynaud-s-phenomenon
#2
Seyed Mohammad Mirbod, Haruo Sugiura
Japanese women now account for 43 percent of the labor force. A number of them are involved in construction, agricultural and forestry jobs. The aim of this study was to establish a non-invasive technique for the evaluation of peripheral circulatory functions in women with Raynaud's phenomenon (RP); and introduce a specific method for the assessment of vascular disturbances in females exposed to hand-transmitted vibration. The subjects of this study were 10 women with primary RP, 7 women with progressive systemic sclerosis (PSS) secondary to RP, and 17 females who were included as the control group...
March 17, 2017: Industrial Health
https://www.readbyqxmd.com/read/28320982/comparison-of-three-acute-stress-models-for-simulating-the-pathophysiology-of-stress-related-mucosal-disease
#3
Bhagawati Saxena, Sanjay Singh
Stress-related mucosal disease (SRMD) is highly prevalent in intensive care patients leading to increasing treatment cost and mortality. SRMD is a disease elusive of ideal treatment. Evaluation of drugs is very pertinent for the efficient and safe treatment of SRMD. It relies mainly on in vivo screening models. There are various stress models, and till date, none of them is validated for simulating the SRMD pathophysiology. The present study aims to choose the best model, which reproduce pathophysiology of SRMD, among previously established stress models...
March 19, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28291489/modeling-of-gender-differences-in-thermoregulation
#4
Anthony E Iyoho, Laurel J Ng, Lisa MacFadden
In January 2013, the Department of Defense lifted a ban that had prevented women from holding combat positions in the military. However, innate differences in physical traits and physiology between men and women likely will result in differences in physical performance. Sex differences in thermoregulation is a key area that needs to be examined due to the potential impact on physical performance. Therefore, we expanded our previously developed thermoregulation model (TRM) to include the effects of gender. Women have been found to have a lower sweat output in heat stress and lesser shivering in cold stress than men; therefore, the equations for sweat mass loss rate and shivering heat generation were modified for women accordingly...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28278384/characterization-of-endogenous-nitric-oxide-role-in-myogenic-vascular-oscillations-during-cooling-evoked-hemodynamic-perturbations-of-rats
#5
Yi-Hsien Lin, Yia-Ping Liu, Yu-Chieh Lin, Po-Lei Lee, Che-Se Tung
Rapid immersion of a rat's limbs into 4°C water, a model of cold stress (CS), can elicit hemodynamic perturbations (CEHP). We have reported that CEHP is highly relevant to the sympathetic activation and nitric oxide production. This study identifies the role of nitric oxide in CEHP. Conscious rats were pretreated with the nitric oxide synthase inhibitor L-NAME alone or following the removal of sympathetic influences using hexamethonium or guanethidine, and then they were subjected to a 10-min CS trial. Hemodynamic indices were telemetrically monitored throughout the experiment...
March 9, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28277426/effect-of-cold-water-immersion-performed-on-successive-days-on-physical-performance-muscle-damage-and-inflammatory-hormonal-and-oxidative-stress-markers-in-volleyball-players
#6
Victor H de Freitas, Solange P Ramos, Maurício G Bara-Filho, Daniel G S Freitas, Danilo R Coimbra, Rubens Cecchini, Flávia A Guarnier, Fábio Y Nakamura
The aim of this study was to investigate the effects of daily cold water immersion (CWI) on physical performance, muscle damage, and inflammatory, hormonal, and oxidative stress markers in volleyball. Six players were submitted to CWI and six players to a placebo, during 5 training days. Thigh circumference, squat jump, and agility were measured on the 1, 3 and 6 days. On the 1 and 6 days, blood and saliva were collected for analysis of oxidative stress, muscle damage, and inflammatory and hormonal levels. Muscle soreness and countermovement jump were quantified daily...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28276987/the-use-of-continuous-vs-intermittent-cold-water-immersion-as-a-recovery-method-in-basketball-players-after-training-a-randomized-controlled-trial
#7
Braulio Sánchez-Ureña, Ismael Martínez-Guardado, Carmen Crespo, Rafael Timón, Julio Calleja-González, Sergio J Ibañez, Guillermo Olcina
OBJECTIVES: The main objective of this study was to compare two cold water immersion protocols, continuous or intermittent, on recovery in basketball players. METHODS: Ten male basketball players (age: 14 ± 0.4 years, body mass: 65.4 ± 9.1 kg, height: 175 ± 7.3 cm, body fat %: 10.3 ± 4) were included in the study. After three 90-minute training sessions (avg. heart rate 158 ± 11.92, 156 ± 7.06 and 151 ± 10.44 bpm), participants were grouped into a continuous immersion (12 min at 12 ± 0...
March 1, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28250934/team-sport-athletes-perceptions-and-use-of-recovery-strategies-a-mixed-methods-survey-study
#8
Fiona Crowther, Rebecca Sealey, Melissa Crowe, Andrew Edwards, Shona Halson
BACKGROUND: A variety of recovery strategies are used by athletes, although there is currently no research that investigates perceptions and usage of recovery by different competition levels of team sport athletes. METHODS: The recovery techniques used by team sport athletes of different competition levels was investigated by survey. Specifically this study investigated if, when, why and how the following recovery strategies were used: active land-based recovery (ALB), active water-based recovery (AWB), stretching (STR), cold water immersion (CWI) and contrast water therapy (CWT)...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28244130/cold-water-immersion-after-exercise-comment-on-recent-data-and-perspectives
#9
Thibaut Méline, Timothée Watier, Anthony Mj Sanchez
Physical exercise is a stress that induces substantial metabolic adaptations such as improvement of cell oxidative capacity. A single exercise bout may cause alterations in intracellular systems activity and microscopic tears in the muscle tissue. This article is protected by copyright. All rights reserved.
February 28, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28242468/habituation-of-the-cold-shock-response-is-inhibited-by-repeated-anxiety-implications-for-safety-behaviour-on-accidental-cold-water-immersions
#10
Martin J Barwood, Jo Corbett, Mike Tipton, Christopher Wagstaff, Heather Massey
INTRODUCTION: Accidental cold-water immersion (CWI) triggers the life-threatening cold shock response (CSR) which is a precursor to sudden death on immersion. One practical means of reducing the CSR is to induce an habituation by undergoing repeated short CWIs. Habituation of the CSR is known to be partially reversed by the concomitant experience of acute anxiety, raising the possibility that repeated anxiety could prevent CSR habituation; we tested this hypothesis. METHOD: Sixteen participants (12 male, 4 female) completed seven, seven-minute immersions in to cold water (15°C)...
February 24, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28236448/gradual-decrease-in-spermatogenesis-caused-by-chronic-stress
#11
Lizbeth Juárez-Rojas, Rosa María Vigueras-Villaseñor, Fahiel Casillas, Socorro Retana-Márquez
Chronic stress induces decreased sperm motility, viability and concentration in stressed males. Also, stress modifies oxidative status and causes apoptosis in testes, as well as a decrease in the epithelial area of seminiferous tubules. However, there are no studies that analyze the alterations caused by stress in testicular cells. Thus, in this study, alterations in the morphology of testicular germ cells caused by different days of chronic stress were assessed. Adult male rats were exposed to stress by immersion in cold water (ICW) daily for 3, 8, 20 or 50 consecutive days...
February 21, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28207294/validity-of-core-temperature-measurements-at-3-rectal-depths-during-rest-exercise-cold-water-immersion-and-recovery
#12
Kevin C Miller, Lexie E Hughes, Blaine C Long, William M Adams, Douglas J Casa
CONTEXT:  No evidence-based recommendation exists regarding how far clinicians should insert a rectal thermistor to obtain the most valid estimate of core temperature. Knowing the validity of temperatures at different rectal depths has implications for exertional heat-stroke (EHS) management. OBJECTIVE:  To determine whether rectal temperature (Trec) taken at 4 cm, 10 cm, or 15 cm from the anal sphincter provides the most valid estimate of core temperature (as determined by esophageal temperature [Teso]) during similar stressors an athlete with EHS may experience...
February 16, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28193437/effects-of-calcium-treatment-and-low-temperature-storage-on-cell-wall-polysaccharide-nanostructures-and-quality-of-postharvest-apricot-prunus-armeniaca
#13
Hui Liu, Fusheng Chen, Shaojuan Lai, Junrui Tao, Hongshun Yang, Zhonggao Jiao
Cell wall polysaccharides play an important role in postharvest fruit texture softening. Effects of calcium treatment combined with cold storage on the physical properties, polysaccharide content and nanostructure of apricots were investigated. Apricots were immersed in distilled water, 1% or 3% w/v calcium chloride, then stored at 5°C or 10°C. Storage at 5°C significantly improved apricot quality and shelf life. Significant changes in the concentration and nanostructure of cell wall pectins and hemicelluloses revealed their disassembly and degradation during apricot storage...
June 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28177718/the-physiological-response-to-cold-water-immersion-following-a-mixed-martial-arts-training-session
#14
Angus Lindsay, Sam Carr, Sean Cross, Carl Petersen, John G Lewis, Steven P Gieseg
Combative sport is one of the most physically intense forms of exercise, yet the effect of recovery interventions has been largely unexplored. We investigated the effect of cold-water immersion on structural, inflammatory, and physiological stress biomarkers following a mixed martial arts (MMA) contest preparation training session in comparison with passive recovery. Semiprofessional MMA competitors (n = 15) were randomly assigned to a cold-water immersion (15 min at 10 °C) or passive recovery protocol (ambient air) completed immediately following a contest preparation training session...
January 17, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28166940/a-10-day-confinement-to-normobaric-hypoxia-impairs-toe-but-not-finger-temperature-response-during-local-cold-stress
#15
Stylianos N Kounalakis, Michail E Keramidas, Mojca Amon, Ola Eiken, Igor B Mekjavic
The study examined the effects of a 10-day normobaric hypoxic confinement on the finger and toe temperature responses to local cooling. Eight male lowlanders underwent a normoxic (NC) and, in a separate occasion, a normobaric hypoxic confinement (HC; FO2: 0.154; simulated altitude ~3400m). Before and after each confinement, subjects immersed for 30min their right hand and, in a different session, their right foot in 8°C water, while breathing either room air (AIR) or a hypoxic gas mixture (HYPO). Throughout the cold-water immersion tests, thermal responses were monitored with thermocouples on fingers and toes...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28160059/finger-cold-induced-vasodilation-of-older-korean-female-divers-haenyeo-effects-of-chronic-cold-exposure-and-aging
#16
Joo-Young Lee, Joonhee Park, Eunsook Koh, Seongwon Cha
The aim of the present study was to evaluate the local cold tolerance of older Korean female divers, haenyeo (N = 22) in terms of cold acclimatization and ageing. As control groups, older non-diving females (N = 25) and young females from a rural area (N = 15) and an urban area (N = 51) participated in this study. To evaluate local cold tolerance, finger cold-induced vasodilation (CIVD) during finger immersion of 4 °C water was examined. As a result, older haenyeos showed greater minimum finger temperature and recovery finger temperature than older non-diving females (P < 0...
February 3, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28150163/fatigue-and-recovery-in-rugby-a-review
#17
REVIEW
Francisco Tavares, Tiaki Brett Smith, Matthew Driller
The physical demands and combative nature of rugby lead to notable levels of muscle damage. In professional rugby, athletes only have a limited timeframe to recover following training sessions and competition. Through the implementation of recovery strategies, sport scientists, practitioners and coaches have sought to reduce the effect of fatigue and allow athletes to recover faster. Although some studies demonstrate that recovery strategies are extensively used by rugby athletes, the research remains equivocal concerning the efficacy of recovery strategies in rugby...
February 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28145015/cold-water-immersion-mechanisms-for-recovery-following-exercise-cellular-stress-and-inflammation-require-closer-examination
#18
Gillian White, Jessica E Caterini
No abstract text is available yet for this article.
February 1, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28141620/cold-water-mediates-greater-reductions-in-limb-blood-flow-than-whole-body-cryotherapy
#19
Chris Mawhinney, David A Low, Helen Jones, Daniel J Green, Joseph T Costello, Warren Gregson
PURPOSE: Cold-water immersion (CWI) and whole body cryotherapy (WBC) are widely used recovery methods in an attempt to limit exercise-induced muscle damage, soreness and functional deficits after strenuous exercise. The aim of this study was to compare the effects of ecologically-valid CWI and WBC protocols on post-exercise lower limb thermoregulatory, femoral artery and cutaneous blood flow responses. METHODS: Ten males completed a continuous cycle exercise protocol at 70% maximal oxygen uptake until a rectal temperature of 38°C was attained...
January 30, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28122036/temporal-and-spatial-variations-of-bacterial-and-faunal-communities-associated-with-deep-sea-wood-falls
#20
Petra Pop Ristova, Christina Bienhold, Frank Wenzhöfer, Pamela E Rossel, Antje Boetius
Sinking of large organic food falls i.e. kelp, wood and whale carcasses to the oligotrophic deep-sea floor promotes the establishment of locally highly productive and diverse ecosystems, often with specifically adapted benthic communities. However, the fragmented spatial distribution and small area poses challenges for the dispersal of their microbial and faunal communities. Our study focused on the temporal dynamics and spatial distributions of sunken wood bacterial communities, which were deployed in the vicinity of different cold seeps in the Eastern Mediterranean and the Norwegian deep-seas...
2017: PloS One
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