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https://www.readbyqxmd.com/read/29291035/the-potential-use-of-physical-resilience-to-predict-healthy-aging
#1
REVIEW
Anna Schorr, Christy Carter, Warren Ladiges
Physical resilience is the ability of an organism to respond to stressors that acutely disrupt normal physiological homeostasis. By definition, resilience decreases with increasing age, while frailty, defined as a decline in tissue function, increases with increasing age. Assessment of resilience could therefore be an informative early paradigm to predict healthy aging compared to frailty, which measures late life dysfunction. Parameters for resilience in the laboratory mouse are not yet well defined, and no single standardized stress test exists...
2018: Pathobiology of Aging & Age related Diseases
https://www.readbyqxmd.com/read/29283744/core-temperature-responses-to-cold-water-immersion-recovery-a-pooled-data-analysis
#2
Jessica M Stephens, Ken Sharpe, Christopher Gore, Joanna Miller, Gary J Slater, Nathan Versey, Jeremiah Peiffer, Rob Duffield, Geoffrey M Minett, David Crampton, Alan Dunne, Christopher D Askew, Shona L Halson
PURPOSE: To examine the effect of post-exercise cold water immersion (CWI) protocols compared with control (CON), on the magnitude and time-course of core temperature (Tc) responses. METHODS: Pooled data analyses were used to examine the Tc responses of 157 subjects from previous post-exercise CWI trials in our laboratories. CWI protocols varied with different combinations of temperature, duration, immersion depth and mode (continuous vs intermittent). Tc was examined as a double difference (ΔΔTc), calculated as the change in Tc in CWI condition minus the corresponding change in CON...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29222596/the-effects-of-local-forearm-muscle-cooling-on-motor-unit-properties
#3
Matthew M Mallette, Lara A Green, David A Gabriel, Stephen S Cheung
PURPOSE: Muscle cooling impairs maximal force. Using needle electromyography (EMG) to assess motor unit properties during muscle cooling, is limited and equivocal. Therefore, we aimed to determine the impact of local muscle cooling on motor unit firing properties using surface EMG decomposition. METHODS: Twenty participants (12 M, 8 F) completed maximal, evoked, and trapezoidal contractions during thermoneutral and cold muscle conditions. Forearm muscle temperature was manipulated using 10-min neutral (~ 32 °C) or 20-min cold (~ 3 °C) water baths...
December 8, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29220355/adults-with-patellofemoral-pain-do-not-exhibit-manifestations-of-peripheral-and-central-sensitization-when-compared-to-healthy-pain-free-age-and-sex-matched-controls-an-assessor-blinded-cross-sectional-study
#4
Michael Skovdal Rathleff, Camilla Rams Rathleff, Aoife Stephenson, Rebecca Mellor, Mark Matthews, Kay Crossley, Bill Vicenzino
Patellofemoral Pain (PFP) is highly prevalent among adults and adolescents. Localized mechanical hyperalgesia around the knee and tibialis anterior have been observed in people with PFP, but limited knowledge of potential manifestations of central sensitisation exists. The aims of this study were to study conditioned pain modulation (CPM) and wide-spread hyperalgesia in adults with PFP. This assessor-blinded cross-sectional study design compared CPM and mechanical pressure pain thresholds (PPT) between 33 adults (23 females) diagnosed with PFP and 32 age and sex matched pain-free controls...
2017: PloS One
https://www.readbyqxmd.com/read/29195958/chlorogenic-acids-and-flavonoid-extraction-during-the-preparation-of-yerba-mate-based-beverages
#5
Tayse Ferreira Ferreira da Silveira, Adriana Dillenburg Meinhart, Thais Cristina Lima de Souza, Elenice Carla Emídio Cunha, Maria Rosa de Moraes, Helena Teixeira Godoy
This study determined the content of chlorogenic acids (CA) and rutin during successive aqueous extraction of yerba mate for tererê and chimarrão from four yerba mate types (smooth, native, traditional and coarse ground). Aqueous extracts were prepared aiming to simulate homemade procedure by partially (chimarrão) or completely (tererê) immersing the herb into hot (chimarrão) or cold (tererê) water (30 times consecutively). The content of CA and rutin in the aqueous extracts was compared to those in methanolic extracts (exhaustive extraction)...
December 2017: Food Research International
https://www.readbyqxmd.com/read/29189587/the-effect-of-cold-14-%C3%A2-c-versus-ice-5%C3%A2-c-water-immersion-on-recovery-from-intermittent-running-exercise
#6
Daniel Anderson, James Nunn, Christopher J Tyler
The purpose was to compare 14°C (CWI14°C) and 5°C (CWI5°C) cold water immersion following intermittent running. On three occasions, nine male team-sport players undertook 12 min of CWI14°C, CWI5°C or non-immersed seated recovery (CON) following 45 min of intermittent running exercise. Maximal cycling performance and markers of recovery were measured before and in the 0 - 72 h after exercise. Peak power output (PPO) was immediately reduced following all interventions (d = 1.8). CWI5°C was more effective at restoring PPO than CWI14°C (d = 0...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29184335/johann-bernhard-aloys-von-gudden-and-the-mad-king-of-bavaria
#7
Kalyan B Bhattacharyya
Bernhard von Gudden was a psychiatrist in Prussia and he was summoned in March 1886 to examine King Ludwig II for his apparently insane activities like, profligate spending and erratic behaviour. A team of four estimable psychiatrists pronounced that he was not capable ruling. Consequently, he was dethroned and kept in a castle under supervision of von Gudden. Gudden championed the idea of 'no restraint' and advocated free movement of insane persons and one evening in June, he accompanied the King during an evening stroll to a lake...
October 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/29173092/ergogenic-effects-of-precooling-with-cold-water-immersion-and-ice-ingestion-a-meta-analysis
#8
Hui C Choo, Kazunori Nosaka, Jeremiah J Peiffer, Mohammed Ihsan, Chris R Abbiss
This review evaluated the effects of precooling via cold water immersion (CWI) and ingestion of ice slurry/slushy or crushed ice (ICE) on endurance performance measures (e.g. time-to-exhaustion and time trials) and psychophysiological parameters (core [Tcore] and skin [Tskin] temperatures, whole body sweat [WBS] response, heart rate [HR], thermal sensation [TS], and perceived exertion [RPE]). Twenty-two studies were included in the meta-analysis based on the following criteria: (i) cooling was performed before exercise with ICE or CWI; (ii) exercise longer than 6 min was performed in ambient temperature ≥26°C; and (iii) crossover study design with a non-cooling passive control condition...
November 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29164310/relevance-of-trpa1-and-trpm8-channels-as-vascular-sensors-of-cold-in-the-cutaneous-microvasculature
#9
REVIEW
Y Pan, D Thapa, L Baldissera, F Argunhan, A A Aubdool, S D Brain
Cold exposure is directly related to skin conditions, such as frostbite. This is due to the cold exposure inducing a vasoconstriction to reduce cutaneous blood flow and protect against heat loss. However, a long-term constriction will cause ischaemia and potentially irreversible damage. We have developed techniques to elucidate the mechanisms of the vascular cold response. We focused on two ligand-gated transient receptor potential (TRP) channels, namely, the established "cold sensors" TRP ankyrin 1 (TRPA1) and TRP melastin (TRPM8)...
November 21, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29158117/cold-acclimation-and-cognitive-performance-a-review
#10
Douglas M Jones, Stephen P Bailey, Bart Roelands, Michael J Buono, Romain Meeusen
Athletes, occupational workers, and military personnel experience cold temperatures through cold air exposure or cold water immersion, both of which impair cognitive performance. Prior work has shown that neurophysiological pathways may be sensitive to the effects of temperature acclimation and, therefore, cold acclimation may be a potential strategy to attenuate cold-induced cognitive impairments for populations that are frequently exposed to cold environments. This review provides an overview of studies that examine repeated cold stress, cold acclimation, and measurements of cognitive performance to determine whether or not cold acclimation provides beneficial protection against cold-induced cognitive performance decrements...
November 17, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29150789/radial-pulse-and-electrocardiography-modulation-by-mild-thermal-stresses-applied-to-feet-an-exploratory-study-with-randomized-crossover-design
#11
Jang-Han Bae, Boncho Ku, Young Ju Jeon, Hyunho Kim, Jihye Kim, Haebeom Lee, Jong Yeol Kim, Jaeuk U Kim
OBJECTIVE: To investigate the changes in radial pulse induced by thermal stresses (TSs). METHODS: Sixty subjects were enrolled. Using an open-label, 2×2 crossover randomization design, both feet of each subject were immersed in 15 °C water for cold stress (CS) and in 40 °C water for heat stress (HS) for 5 min each. Radial pulse, respiration and electrocardiogram (ECG) signals were recorded before, during and immediately after the TSs. RESULTS: The analysis of heart rate variability revealed that CS increased the low-frequency (LF) and high-frequency (HF) components (P <0...
November 17, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29130570/cold-water-or-partial-body-cryotherapy-comparison-of-physiological-responses-and-recovery-following-muscle-damage
#12
Erich Hohenauer, Joseph T Costello, Rahel Stoop, Ursula M Küng, Peter Clarys, Tom Deliens, Ron Clijsen
The aim of this study was to compare i) the physiological responses following cold-water immersion (CWI) and partial-body cryotherapy (PBC) and ii) the effects on recovery following a muscle-damaging protocol (5 x 20 drop jumps). Nineteen healthy males were randomly allocated into either a CWI (10 °C for 10 min; n = 9) or a PBC (-60 °C for 30 sec, -135 °C for 2 min; n = 10) group. The physiological variables (thigh muscle oxygen saturation [SmO2 ], cutaneous vascular conductance [CVC], mean-arterial pressure [MAP] and local skin temperature) were assessed immediately prior and up to 60 min post-treatment (10 min intervals)...
November 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29127510/recovery-following-a-marathon-a-comparison-of-cold-water-immersion-whole-body-cryotherapy-and-a-placebo-control
#13
Laura J Wilson, Emma Cockburn, Katherine Paice, Scott Sinclair, Tanwir Faki, Frank A Hills, Marcela B Gondek, Alyssa Wood, Lygeri Dimitriou
PURPOSE: Cryotherapy is an increasingly popular recovery strategy used in an attempt to attenuate the negative impact of strenuous physical activity on subsequent exercise. Therefore, this study aimed to assess the effects of whole body cryotherapy (WBC) and cold water immersion (CWI) on markers of recovery following a marathon. METHODS: Thirty-one endurance trained males completed a marathon. Participants were randomly assigned to a CWI, WBC or placebo group. Perceptions of muscle soreness, training stress and markers of muscle function were recorded before the marathon and at 24 and 48 h post exercise...
November 10, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29122653/validation-of-an-automated-bilateral-feet-cold-pressor-test
#14
Petra Bachmann, Xinwei Zhang, Mauro F Larra, Dagmar Rebeck, Karsten Schönbein, Klaus P Koch, Hartmut Schächinger
The Cold Pressor Test (CPT) is often used in psychobiological research. However, the classical CPT version (unilateral hand immersion into ice-water) involves some disadvantages: hands may be needed for further applications, attentional drift towards the affected sensory hemi-field and/or physiological activation of the contralateral hemisphere may produce a laterality bias. Furthermore, instruction-induced motor activity may bias physiologic reactivity. To avoid these problems, a fully automated bilateral feet CPT was developed and tested for validity and feasibility...
November 6, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29121286/prediction-of-persistent-post-surgery-pain-by-preoperative-cold-pain-sensitivity-biomarker-development-with-machine-learning-derived-analysis
#15
J Lötsch, A Ultsch, E Kalso
Background: To prevent persistent post-surgery pain, early identification of patients at high risk is a clinical need. Supervised machine-learning techniques were used to test how accurately the patients' performance in a preoperatively performed tonic cold pain test could predict persistent post-surgery pain. Methods: We analysed 763 patients from a cohort of 900 women who were treated for breast cancer, of whom 61 patients had developed signs of persistent pain during three yr of follow-up...
October 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29120980/effect-of-cold-water-immersion-on-elbow-flexors-muscle-thickness-after-resistance-training
#16
Filipe Matos, Eduardo Borba Neves, Claudio Rosa, Victor Machado Reis, Francisco Saavedra, Severiano Silva, José Vilaça-Alves
Cold Water Immersion (CWI) is commonly applied in order to speed up the recovery process after exercise. Muscle damage may induce a performance reduction, consequence of the intramuscular pressure induced by the muscular swelling. The aim of the study was to verify the CWI effects on muscle thickness (MT) behavior of the elbow flexors after a strength training protocol (ST). Eleven males were submitted to a RT, performed in two different weeks. In one of the weeks, subjects experienced a passive recovery. In the other, subjects were submitted to a CWI (20 min at 5C-10°C)...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29072114/a-customised-cold-water-immersion-protocol-favours-one-size-fits-all-protocols-in-improving-acute-performance-recovery
#17
Coen S Zandvoort, Jelmer R de Zwart, Brenda L van Keeken, Patrick J F Viroux, Ivo J H Tiemessen
The purpose of the present study was to investigate whether a customised cold-water immersion (CWIc) protocol was more effective in enhancing acute performance recovery than a one-size-fits-all CWI (CWIs) or active recovery (AR) protocol. On three separate testing days, 10 healthy, physically active, non-smoking males completed the same fatiguing protocol (60 squat jumps and a 2'30″ all-out cycling time-trial) followed by CWIc (12°C, 10-17 min), CWIs (15°C, 10 min) or AR (60 W, 10 min). Outcome measures to assess acute recovery were heart rate variability (HRV) as HRVrecovery, muscle power (MP) as absolute and relative decline, and muscle soreness (MS) at 0 and 24 h...
October 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29064890/carotid-artery-reactivity-predicts-events-in-peripheral-arterial-disease-patients
#18
Anke C C M van Mil, Sjaak Pouwels, Jelmer Wilbrink, Michiel C Warlé, Dick H J Thijssen
OBJECTIVE: Patients with peripheral arterial disease (PAD) have increased risk on future cerebro- and cardiovascular events. Our aim was to examine whether carotid artery reactivity (CAR; a novel, simple procedure to examine endothelial function) predicts cardiovascular events in PAD patients. BACKGROUND: Increased risk for future cardiovascular events in PAD patients is likely related to endothelial dysfunction, highlighting the necessity for simple assessment of endothelial function...
October 23, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/29022796/aural-exostoses-surfer-s-ear-provide-vital-fossil-evidence-of-an-aquatic-phase-in-man-s-early-evolution
#19
P H Rhys Evans, M Cameron
For over a century, otolaryngologists have recognised the condition of aural exostoses, but their significance and aetiology remains obscure, although they tend to be associated with frequent swimming and cold water immersion of the auditory canal. The fact that this condition is usually bilateral is predictable since both ears are immersed in water. However, why do exostoses only grow in swimmers and why do they grow in the deep bony meatus at two or three constant sites? Furthermore, from an evolutionary point of view, what is or was the purpose and function of these rather incongruous protrusions? In recent decades, paleoanthropological evidence has challenged ideas about early hominid evolution...
September 15, 2017: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29018924/rapid-volumetric-photoacoustic-tomographic-imaging-with-a-fabry-perot-ultrasound-sensor-depicts-peripheral-arteries-and-microvascular-vasomotor-responses-to-thermal-stimuli
#20
Andrew A Plumb, Nam Trung Huynh, Jamie Guggenheim, Edward Zhang, Paul Beard
PURPOSE: To determine if a new photoacoustic imaging (PAI) system successfully depicts (1) peripheral arteries and (2) microvascular circulatory changes in response to thermal stimuli. METHODS: Following ethical permission, 8 consenting subjects underwent PAI of the dorsalis pedis (DP) artery, and 13 completed PAI of the index fingertip. Finger images were obtained after immersion in warm (30-35 °C) or cold (10-15 °C) water to promote vasodilation or vasoconstriction...
October 10, 2017: European Radiology
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