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https://www.readbyqxmd.com/read/28074275/crossover-assessment-of-cardiolocomotor-synchronization-during-running
#1
Lucenildo Silva Cerqueira, Aluizio D'Affonsêca Netto, Roger Gomes Tavares Mello, Jurandir Nadal
PURPOSE: This study aimed at testing the hypothesis that positive cardiolocomotor coordination (CLC) measure occurs by chance during a running task where the heart rate (HR) is approximated to the step frequency (StepF). METHODS: The electrocardiogram and electromyogram from the right gastrocnemius lateralis muscle were continuously recorded from ten healthy young men running at a paced rhythm of 152 step/min, to monitor HR and StepF. CLC was evaluated by phase synchrograms and the index of conditional probability (iCP)...
January 10, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28069780/a-chlorophyll-fluorescence-based-method-for-the-integrated-characterization-of-the-photophysiological-response-to-light-stress
#2
João Serôdio, William Schmidt, Silja Frankenbach
This work introduces a new experimental method for the comprehensive description of the physiological responses to light of photosynthetic organisms. It allows the integration in a single experiment of the main established manipulative chlorophyll fluorescence-based protocols. It enables the integrated characterization of the photophysiology of samples regarding photoacclimation state (generating non-sequential light-response curves of effective PSII quantum yield, electron transport rate or non-photochemical quenching), photoprotection capacity (running light stress-recovery experiments, quantifying non-photochemical quenching components) and the operation of photoinactivation and photorepair processes (measuring rate constants of photoinactivation and repair for different light levels and the relative quantum yield of photoinactivation)...
January 9, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28053030/tau-isoforms-imbalance-impairs-the-axonal-transport-of-the-amyloid-precursor-protein-in-human-neurons
#3
Valentina Lacovich, Sonia L Espindola, Matías Alloatti, Victorio Pozo Devoto, Lucas E Cromberg, Mária E Čarná, Giancarlo Forte, Jean-Marc Gallo, Luciana Bruno, Gorazd B Stokin, M Elena Avale, Tomás L Falzone
: Tau, as a microtubule (MT)-associated protein, participates in key neuronal functions such as the regulation of MT dynamics, axonal transport, and neurite outgrowth. Alternative splicing of exon 10 in the tau primary transcript gives rise to protein isoforms with three (3R) or four (4R) MT binding repeats. Although tau isoforms are balanced in the normal adult human brain, imbalances in 3R:4R ratio have been tightly associated with the pathogenesis of several neurodegenerative disorders, yet the underlying molecular mechanisms remain elusive...
January 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28047932/tu-h-campus-iep3-02-neurovascular-4d-parametric-imaging-using-co-registration-of-biplane-dsa-sequences-with-3d-vascular-geometry-obtained-from-cone-beam-ct
#4
A Balasubramoniam, D Bednarek, S Rudin, C Ionita
PURPOSE: To create 4D parametric images using biplane Digital Subtraction Angiography (DSA) sequences co-registered with the 3D vascular geometry obtained from Cone Beam-CT (CBCT). METHODS: We investigated a method to derive multiple 4D Parametric Imaging (PI) maps using only one CBCT acquisition. During this procedure a 3D-DSA geometry is stored and used subsequently for all 4D images. Each time a biplane DSA is acquired, we calculate 2D parametric maps of Bolus Arrival Time (BAT), Mean Transit Time (MTT) and Time to Peak (TTP)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047421/mo-de-207b-03-improved-cancer-classification-using-patient-specific-biological-pathway-information-via-gene-expression-data
#5
M Young, D Craft
PURPOSE: To develop an efficient, pathway-based classification system using network biology statistics to assist in patient-specific response predictions to radiation and drug therapies across multiple cancer types. METHODS: We developed PICS (Pathway Informed Classification System), a novel two-step cancer classification algorithm. In PICS, a matrix m of mRNA expression values for a patient cohort is collapsed into a matrix p of biological pathways. The entries of p, which we term pathway scores, are obtained from either principal component analysis (PCA), normal tissue centroid (NTC), or gene expression deviation (GED)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046175/acute-effects-of-general-anesthesia-with-propofol-pentobarbital-or-isoflurane-plus-propofol-on-plasma-metabolites-and-hormones-in-adult-pigs
#6
G Daş, A Vernunft, S Görs, E Kanitz, J M Weitzel, K-P Brüssow, C C Metges
Experimental setups for physiological research, in which acute operative interventions need to be performed, can require inclusion of general anesthesia (GA), which may interfere or confound with the effects of the experimental factors of interest on measured variables. It was recently shown that the most commonly used sedatives/anesthetics in pigs (e.g., ketamine, xylazine, azaperone) affect physiological responses and thus the primary metabolic readouts have the potential to be confounded. To extend the search for a physiologically-friendly anesthesia regime for such studies, we investigated effects of GA induced by propofol (Prop) or pentobarbital (Pent) or propofol plus isoflurane (Prop + Isof) on plasma concentrations of commonly measured metabolites and hormones...
December 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/28039074/caffeine-stimulates-voluntary-wheel-running-in-mice-without-increasing-aerobic-capacity
#7
Gerald C Claghorn, Zoe Thompson, Kristianna Wi, Lindsay Van, Theodore Garland
The "energy drink" Red Bull and the "sports drink" Gatorade are often marketed to athletes, with claims that they cause performance gains. However, both are high in sugars, and also consumed by non-athletes. Few studies have addressed the effects of these drinks or their biologically active components in rodent exercise models. We used three experiments to test effects on both voluntary exercise behavior and maximal aerobic capacity in lines of mice known to differ in "athletic" traits. Mice from four replicate High Runner (HR) lines have been selectively bred for voluntary running on wheels, and run approximately three times as many revolutions per day as do mice from four non-selected Control (C) lines...
December 28, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/28035865/effect-of-contact-and-no-contact-small-sided-games-on-elite-handball-players
#8
Antonio Dello Iacono, Domenico Martone, Alessandro Moura Zagatto, Yoav Meckel, Mahmood Sindiani, Mirjana Milic, Johnny Padulo
This study aimed to investigate the effect of contact (C-SSG) and no-contact (NC-SSG) handball small-sided games (SSGs) on motion patterns and physiological responses of elite handball players. Twelve male handball players performed 10 C-SSG and 10 NC-SSG while being monitored through the heart rate (HR) and rate of perceived exertion (RPE) as physiological responses and time-motion activities profile using video-match analysis. Both game conditions resulted in similar HR responses (P > 0.05), but the NC-SSG led to a higher RPE scores...
December 30, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28032379/changes-in-cardiovascular-performance-biochemistry-gastric-motility-and-muscle-temperature-induced-by-acute-exercise-on-a-treadmill-in-healthy-military-dogs
#9
R W Queiroz, V L Silva, D R Rocha, D S Costa, S H N Turco, M T B Silva, A A Santos, M B L Oliveira, A S R Pereira, R C Palheta-Junior
Changes in physiological parameters that are induced by acute exercise on a treadmill in healthy military dogs have not been thoroughly investigated, especially with regard to age. This study investigated the effects of acute exercise on a treadmill on cardiovascular function, biochemical parameters and gastric antral motility in military dogs. Thermography was used to assess variations in superficial hindlimb muscle temperature. Nine healthy dogs were distributed into three groups according to their age (Group I: 25 ± 7 months; Group II: 51 ± 12 months; Group III: 95 ± 10 months) and sequentially subjected to running exercise on a treadmill for 12 min (3...
December 29, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28031761/physiological-responses-during-the-time-limit-at-100-of-the-peak-velocity-in-the-carminatti-s-test-in-futsal-players
#10
Leandro Teixeira Floriano, Juliano Fernandes da Silva, Anderson Santiago Teixeira, Paulo Cesar do Nascimento Salvador, Naiandra Dittrich, Lorival José Carminatti, Lucas Loyola Nascimento, Luiz Guilherme Antonacci Guglielmo
The aim of this study was to investigate the physiological responses during the time limit at the intensity of the peak velocity of the Carminatti's test (T-CAR). Ten professional futsal players (age, 27.4 ± 5.8 years, body mass, 78.8 ± 8.5 kg, body height, 175.8 ± 6.8 cm, body fat mass, 14.1 ± 2.6%) took part in the study. The players performed three tests, with an interval of at least 48 hours, as follows: the T-CAR to determine the peak velocity and the maximal heart rate; an incremental treadmill protocol to determine the maximal physiological responses; and a time limit running test at the peak velocity reached in the T-CAR...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28028816/physiological-limits-to-endurance-exercise-performance-influence-of-sex
#11
Michael J Joyner
This brief review summarizes factors associated with elite endurance performance, trends in distance running training, and participation by men and more recently women. It is framed in the context of key ideas about the physiological determinants of endurance performance but also touches on some historical and sociological factors relevant to the overall topic. Historical trends that served to increase women's participation in elite endurance events are also discussed as is the role of increased volume and intensity of training...
December 28, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/28018241/master-athletes-are-extending-the-limits-of-human-endurance
#12
REVIEW
Romuald Lepers, Paul J Stapley
The increased participation of master athletes (i.e., >40 years old) in endurance and ultra-endurance events (>6 h duration) over the past few decades has been accompanied by an improvement in their performances at a much faster rate than their younger counterparts. Aging does however result in a decrease in overall endurance performance. Such age-related declines in performance depend upon the modes of locomotion, event duration, and gender of the participant. For example, smaller age-related declines in cycling performance than in running and swimming have been documented...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/28017680/circulating-levels-of-endocannabinoids-respond-acutely-to-voluntary-exercise-are-altered-in-mice-selectively-bred-for-high-voluntary-wheel-running-and-differ-between-the-sexes
#13
Zoe Thompson, Donovan Argueta, Theodore Garland, Nicholas DiPatrizio
The endocannabinoid system serves many physiological roles, including in the regulation of energy balance, food reward, and voluntary locomotion. Signaling at the cannabinoid type 1 receptor has been specifically implicated in motivation for rodent voluntary exercise on wheels. We studied four replicate lines of high runner (HR) mice that have been selectively bred for 81 generations based on average number of wheel revolutions on days five and six of a six-day period of wheel access. Four additional replicate lines are bred without regard to wheel running, and serve as controls (C) for random genetic effects that may cause divergence among lines...
December 22, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/28012121/triathlon-training-for-women-breast-cancer-survivors-feasibility-and-initial-efficacy
#14
Alexander V Ng, Alyson N Cybulski, Ashley A Engel, Paula E Papanek, Megan A Sheffer, Leslie J Waltke, Judy A Tjoe
: ᅟ: Exercise can improve quality of life (QOL) in breast cancer survivors. In contrast to many group or home-based exercise programs, little is known about the effectiveness of goal-oriented recreational activities. PURPOSE: The purpose of this study was to evaluate a clinically overseen team triathlon training program on improving physiological and psychosocial health-related measures in female breast cancer survivors. METHODS: Twenty-three participants (age = 48 (8), BMI = 25 (1), mean (SE)) were recruited from a 14-week sprint triathlon (800-m swim, 20-km bike, 5-km run) team training program for women breast cancer survivors (4 (3) years post-surgery, chemo-, or radiation-therapy)...
December 24, 2016: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28012036/no-influence-of-ischemic-preconditioning-on-running-economy
#15
Gungeet Kaur, Megan Binger, Claire Evans, Tiffany Trachte, Gary P Van Guilder
PURPOSE: Many of the potential performance-enhancing properties of ischemic preconditioning suggest that the oxygen cost for a given endurance exercise workload will be reduced, thereby improving the economy of locomotion. The aim of this study was to identify whether ischemic preconditioning improves exercise economy in recreational runners. METHODS: A randomized sham-controlled crossover study was employed in which 18 adults (age 27 ± 7 years; BMI 24.6 ± 3 kg/m(2)) completed two, incremental submaximal (65-85% VO2max) treadmill running protocols (3 × 5 min stages from 7...
December 23, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28008332/quantitative-proteomic-analyses-identify-aba-related-proteins-and-signal-pathways-in-maize-leaves-under-drought-conditions
#16
Yulong Zhao, Yankai Wang, Hao Yang, Wei Wang, Jianyu Wu, Xiuli Hu
Drought stress is one of major factors resulting in maize yield loss. The roles of abscisic acid (ABA) have been widely studied in crops in response to drought stress. However, more attention is needed to identify key ABA-related proteins and also gain deeper molecular insights about drought stress in maize. Based on this need, the physiology and proteomics of the ABA-deficient maize mutant vp5 and its wild-type Vp5 under drought stress were examined and analyzed. Malondialdehyde content increased and quantum efficiency of photosystem II decreased under drought stress in both genotypes...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28004287/an-efficient-remote-authentication-scheme-for-wireless-body-area-network
#17
Anyembe Andrew Omala, Kittur P Kibiwott, Fagen Li
Wireless body area network (WBAN) provide a mechanism of transmitting a persons physiological data to application providers e.g. hospital. Given the limited range of connectivity associated with WBAN, an intermediate portable device e.g. smartphone, placed within WBAN's connectivity, forwards the data to a remote server. This data, if not protected from an unauthorized access and modification may be lead to poor diagnosis. In order to ensure security and privacy between WBAN and a server at the application provider, several authentication schemes have been proposed...
February 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28002177/selected-physiological-perceptual-and-physical-performance-changes-during-two-bouts-of-prolonged-high-intensity-intermittent-running-separated-by-72-hours
#18
Nicholas Dobbin, Kevin Lamb, Craig Twist
This study investigated the effects of performing a second 90-minute intermittent running protocol 72 hours after an initial trial on selected physiological, perceptual and sprint running measures. Eight sub-elite soccer players provided measures of isokinetic muscle function, counter-movement jump (CMJ), 10 m sprinting, and muscle soreness before, and at 0, 24, 48 and 72 h after a 90-minute intermittent high intensity running bout (IHIR 1). A second 90-minute intermittent high intensity running bout (IHIR 2) was performed 72 h after the first...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27999298/visualization-of-fluoride-ions-in-vivo-using-a-gadolinium-iii-coumarin-complex-based-fluorescence-mri-dual-modal-probe
#19
Yue Wang, Renfeng Song, Huan Feng, Ke Guo, Qingtao Meng, Haijun Chi, Run Zhang, Zhiqiang Zhang
A new Gadolinium(III)-coumarin complex, DO3A-Gd-CA, was designed and prepared as a dual-modal probe for simultaneous fluorescence and relaxivity responses to fluoride ions (F(-)) in aqueous media and mice. DO3A-Gd-CA was designed by using Gd(III) center as an MRI signal output unit and fluoride binding site, and the 4-(diethylamino)-coumarin-3-carboxylic acid (CA) as a fluorescence reporter. Upon the addition of fluoride ions to the solution of DO3A-Gd-CA, the liberation of the coordinated CA ligand led to a 5...
December 16, 2016: Sensors
https://www.readbyqxmd.com/read/27976750/compass-continuous-open-mouse-phenotyping-of-activity-and-sleep-status
#20
Laurence A Brown, Sibah Hasan, Russell G Foster, Stuart N Peirson
Background  Disruption of rhythms in activity and rest occur in many diseases, and provide an important indicator of healthy physiology and behaviour. However, outside the field of sleep and circadian rhythm research, these rhythmic processes are rarely measured due to the requirement for specialised resources and expertise. Until recently, the primary approach to measuring activity in laboratory rodents has been based on voluntary running wheel activity. By contrast, measuring sleep requires the use of electroencephalography (EEG), which involves invasive surgical procedures and time-consuming data analysis...
2016: Wellcome Open Res
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