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https://www.readbyqxmd.com/read/29352373/sleep-interventions-designed-to-improve-athletic-performance-and-recovery-a-systematic-review-of-current-approaches
#1
REVIEW
Daniel Bonnar, Kate Bartel, Naomi Kakoschke, Christin Lang
BACKGROUND: Athletes experience various situations and conditions that can interfere with their sleep, which is crucial for optimal psychological and physiological recovery as well as subsequent performance. Conventional sleep screening and intervention approaches may not be efficacious for athletes given their lifestyle, the demands of training and travel associated with interstate/international competition. OBJECTIVES: The present systematic review aimed to summarize and evaluate sleep intervention studies targeting subsequent performance and recovery in competitive athletes...
January 20, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29352279/girls-in-the-boat-sex-differences-in-rowing-performance-and-participation
#2
Kevin G Keenan, Jonathon W Senefeld, Sandra K Hunter
Men outperform women in many athletic endeavors due to physiological and anatomical differences (e.g. larger and faster muscle); however, the observed sex differences in elite athletic performance are typically larger than expected, and may reflect sex-related differences in opportunity or incentives. As collegiate rowing in the United States has been largely incentivized for women over the last 20 years, but not men, the purpose of this study was to examine sex differences in elite rowing performance over that timeframe...
2018: PloS One
https://www.readbyqxmd.com/read/29352267/differential-susceptibility-of-striatal-hippocampal-and-cortical-neurons-to-caspase-6
#3
Anastasia Noël, Libin Zhou, Bénédicte Foveau, P Jesper Sjöström, Andréa C LeBlanc
Active cysteinyl protease Caspase-6 is associated with early Alzheimer and Huntington diseases. Higher entorhinal cortex and hippocampal Caspase-6 levels correlate with lower cognitive performance in aged humans. Caspase-6 induces axonal degeneration in human primary neuron cultures and causes inflammation and neurodegeneration in mouse hippocampus, and age-dependent memory impairment. To assess whether Caspase-6 causes damage to another neuronal system, a transgenic knock-in mouse overexpressing a self-activated form of Caspase-6 five-fold in the striatum, the area affected in Huntington disease, and 2...
January 19, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29350276/effect-of-swimming-exercise-on-premenstrual-syndrome
#4
Ahmed Mohamed Maged, Amr H Abbassy, Hend R S Sakr, Heba Elsawah, Heba Wagih, Asmaa I Ogila, Amal Kotb
OBJECTIVE: To study the effectiveness of performing swimming on the severity of symptoms of premenstrual syndrome (PMS). MATERIALS AND METHODS: A randomized controlled trial that was conducted on 70 women diagnosed with PMS divided randomly into two equal groups: Group I included women who engaged into exercise and group II controls. Daily Symptoms Report was filled at the start and at end of the study. RESULTS: At the posttreatment evaluation, there was a highly significant difference between the study and control groups regarding anxiety (0 vs...
January 19, 2018: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/29350264/linking-muscle-metabolism-and-functional-variation-to-field-swimming-performance-in-bluegill-sunfish-lepomis-macrochirus
#5
David J Ellerby, Shauna Cyr, Angela X Han, Mika Lin, Lloyd A Trueblood
Skeletal muscle has diverse mechanical roles during locomotion. In swimming fish, power-producing muscles work in concert with the accessory muscles of the fins which augment and control power transfer to the water. Although fin muscles represent a significant proportion of the locomotor muscle mass, their physiological properties are poorly characterized. To examine the relationship between muscle metabolism and the differing mechanical demands placed on distinct muscle groups, we quantified the aerobic and glycolytic capacities of the myotomal, pectoral and caudal muscles of bluegill sunfish...
January 19, 2018: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/29345161/caffeine-improves-triathlon-performance-a-field-study-in-males-and-females
#6
Sunita Potgieter, Hattie H Wright, Carine Smith
The ergogenic effect of caffeine on endurance exercise is commonly accepted. We aimed to elucidate realistically the effect of caffeine on triathlon event performance using a field study design, while allowing investigation into potential mechanisms at play. A double-blind, randomized, crossover, field trial was conducted. Twenty-six triathletes (14 males, 12 females) participated (age: 37.8±10.6 years, habitual caffeine intake: 413±505 mg/day, percentage body fat: 14.5±7.2%, training/week: 12.8±4.5 hours)...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29342146/a-theory-of-how-active-behavior-stabilises-neural-activity-neural-gain-modulation-by-closed-loop-environmental-feedback
#7
Christopher L Buckley, Taro Toyoizumi
During active behaviours like running, swimming, whisking or sniffing, motor actions shape sensory input and sensory percepts guide future motor commands. Ongoing cycles of sensory and motor processing constitute a closed-loop feedback system which is central to motor control and, it has been argued, for perceptual processes. This closed-loop feedback is mediated by brainwide neural circuits but how the presence of feedback signals impacts on the dynamics and function of neurons is not well understood. Here we present a simple theory suggesting that closed-loop feedback between the brain/body/environment can modulate neural gain and, consequently, change endogenous neural fluctuations and responses to sensory input...
January 17, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29339350/correction-the-constant-threat-from-a-non-native-predator-increases-tail-muscle-and-fast-start-swimming-performance-in-xenopus-tadpoles
#8
Tsukasa Mori, Yukio Yanagisawa, Yoichiro Kitani, Goshi Yamamoto, Naoko Goto-Inoue, Tadashi Kimura, Keiko Kashiwagi, Akihiko Kashiwagi
No abstract text is available yet for this article.
January 16, 2018: Biology Open
https://www.readbyqxmd.com/read/29336370/differences-of-matrix-metalloproteinase-2-expression-between-left-and-right-ventricles-in-response-to-nandrolone-decanoate-and-or-swimming-training-in-mice
#9
Ying Bai, Xu-Bo Shi, Yu-Qiong Zhang, Yue-Li Wang, Xin-Yao Liu, María Asunción Esteve-Pastor
BACKGROUND: Matrix metalloproteinase (MMP)-2 plays an important role in the remodeling of left ventricles (LVs) and right ventricles (RVs). We investigated the differences of MMP-2 expression between LV and RV in response to nandrolone decanoate (ND), swimming training (ST), and combined ND and ST (NS) in mice, based on their structural, functional, and biochemical characteristics. METHODS: Totally 28 male C57B1 mice (6 weeks old; 20-23 g) were divided into four groups, including the control (n = 7), ND (n = 6), ST (n = 8), and NS (n = 7) groups...
January 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29336209/effects-of-treadmill-training-combined-with-serotonergic-interventions-on-spasticity-after-contusive-spinal-cord-injury
#10
Youngjae Ryu, Toru Ogata, Motoshi Nagao, Yasuhiro Sawada, Ryohei Nishimura, Naoki Fujita
Spasticity usually emerges during the course of recovery from spinal cord injury (SCI). While medications and physical rehabilitation are prescribed to alleviate spastic symptoms, the insufficiency of their effects remains an important problem to be addressed. Given the challenges associated with increasing the dose of medication, we supposed that a combination therapy with medication and physical rehabilitation can be effective. Therefore, we examined the effects of treadmill training (TMT) along with serotonergic medication using a spastic rat model after contusive injury...
January 16, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29334868/biomechanical-analyses-of-synchronised-swimming-standard-and-contra-standard-sculling
#11
Lara Elena Gomes, Vera Diogo, Flávio Antônio de Souza Castro, João Paulo Vilas-Boas, Ricardo J Fernandes, Pedro Figueiredo
Synchronised swimming involves a variety of sculling movements essential for body support and propulsion but its study is scarce. We aimed to biomechanically compare standard and contra-standard sculling techniques, and to observe the relationship between measures. Six synchronised swimmers performed two, 30 s maximal intensity, fully tethered standard and contra-standard sculling motions. Kinetic and kinematic data were obtained using a load-cell and underwater cameras, respectively. Force decreased along both techniques' bouts, but no differences in-between techniques were noted for any kinetic variables...
January 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29332488/role-of-the-hippocampal-5-ht1a-receptor-mediated-camp-pka-signalling-pathway-in-sevoflurane-induced-cognitivedysfunction-in-aged-rats
#12
Yi Qiu, Ying Wang, Xiaodong Wang, Caixia Wang, Zhong-Yuan Xia
Objective This study aimed to evaluate the role of the hippocampal 5-hydroxytryptamine-1A (5-HT1A)-mediated cyclic adenosine monophosphate/protein kinase A (cAMP/PKA) signalling pathway in sevoflurane-induced cognitive dysfunction in aged rats. Methods Sixty 18-month-old Sprague-Dawley rats were divided into the control (n = 30) and experimental (Sev, n = 30) groups. The experimental group inhaled 50% air/oxygen mixture (2 L/min) and 2% sevoflurane for 4 hours. The control group inhaled 50% air/oxygen mixture (2 L/min) for 4 hours...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29327649/the-effect-of-auditory-stimulus-training-on-swimming-start-reaction-time
#13
Christopher Papic, Peter Sinclair, Che Fornusek, Ross Sanders
Task-specific auditory training can improve sensorimotor processing times of the auditory reaction time (RT). The majority of competitive swimmers do not conduct habitual start training with the electronic horn used to commence a race. We examined the effect of four week dive training interventions on RT and block time (BT) of 10 male adolescent swimmers (age 14.0 ± 1.4 years): dive training with auditory components (speaker and electronic horn) (n = 5) and dive training without auditory components (n = 5)...
January 12, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29327281/effect-of-early-natal-supplementation-of-paracetamol-on-attenuation-of-exotoxin-endotoxin-induced-pyrexia-and-precipitation-of-autistic-like-features-in-albino-rats
#14
Abdulaziz S Saeedan, Indu Singh, Mohd Nazam Ansari, Manjari Singh, Jitendra K Rawat, Uma Devi, Swetlana Gautam, Rajnish K Yadav, Gaurav Kaithwas
The present study was aimed to test the hypothesis that paracetamol (PCM) can precipitate autistic like features when used to counteract vaccine-induced fever using experimental rat pups. The pups were treated with measles mumps rubella (MMR) vaccine, diphtheria tetanus and pertussis (DPT) vaccines and lipopolysaccharide (LPS) with subsequent PCM treatment. The pups were evaluated for postnatal growth (weight gain, eye opening) and behavior alterations (swimming performance, olfactory discrimination, negative geotaxis, nociception, and locomotor activity) by performing battery of neurobehavioral test...
January 11, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29326893/treadmill-exercise-ameliorates-social-isolation-induced-depression-through-neuronal-generation-in-rat-pups
#15
Jung-Wan Cho, Sun-Young Jung, Sang-Won Lee, Sam-Jun Lee, Tae-Beom Seo, Young-Pyo Kim, Dae-Young Kim
Social isolation is known to induce emotional and behavioral changes in animals and humans. The effect of treadmill exercise on depression was investigated using social isolated rat pups. The rat pups in the social isolation groups were housed individually. The rat pups in the exercise groups were forced to run on treadmill for 30 min once a day from postnatal day 21 to postnatal day 34. In order to evaluate depression state of rat pups, forced swimming test was performed. Newly generated cells in the hippocampal dentate gyrus were determined by 5-bromo-2'-deoxyuridine (BrdU) immunohistochemistry...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29326114/biomechanics-of-swimming-in-developing-larval-fish
#16
REVIEW
Cees J Voesenek, Florian T Muijres, Johan L van Leeuwen
Most larvae of bony fish are able to swim almost immediately after hatching. Their locomotory system supports several vital functions: fish larvae make fast manoeuvres to escape from predators, aim accurately during suction feeding and may migrate towards suitable future habitats. Owing to their small size and low swimming speed, larval fish operate in the intermediate hydrodynamic regime, which connects the viscous and inertial flow regimes. They experience relatively strong viscous effects at low swimming speeds, and relatively strong inertial effects at their highest speeds...
January 11, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29324853/disentangling-and-modeling-interactions-in-fish-with-burst-and-coast-swimming-reveal-distinct-alignment-and-attraction-behaviors
#17
Daniel S Calovi, Alexandra Litchinko, Valentin Lecheval, Ugo Lopez, Alfonso Pérez Escudero, Hugues Chaté, Clément Sire, Guy Theraulaz
The development of tracking methods for automatically quantifying individual behavior and social interactions in animal groups has open up new perspectives for building quantitative and predictive models of collective behavior. In this work, we combine extensive data analyses with a modeling approach to measure, disentangle, and reconstruct the actual functional form of interactions involved in the coordination of swimming in Rummy-nose tetra (Hemigrammus rhodostomus). This species of fish performs burst-and-coast swimming behavior that consists of sudden heading changes combined with brief accelerations followed by quasi-passive, straight decelerations...
January 11, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29321989/antidepressant-like-effects-of-gan-mai-dazao-tang-via-monoamine-regulatory-pathways-on-forced-swimming-test-in-rats
#18
Hsiang-Ling Huang, Swee-Ling Lim, Kuan-Hung Lu, Lee-Yan Sheen
Depression is a highly prevalent and recurrent mental disorder that impacts all aspects of human life. Undesirable effects of the antidepressant drugs led to the development of complementary and alternative therapies. Gan-Mai-Da-Zao-Tang (, gān mài dà zǎo tang) is a traditional herbal formula commonly used for the treatment of depression, but lack of scientific proof on its mechanism. It consisted of Glycyrrhiza uralensis Fisch. (licorice), Triticum aestivum L. (wheat) and Zizphus jujuba Mill. (jujube)...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29318954/contribution-of-limbs-actions-to-the-four-competitive-swimming-strokes-a-nonlinear-approach
#19
Raul F Bartolomeu, Mário J Costa, Tiago M Barbosa
The aim of our study was to assess the effect of the limbs' actions on the nonlinear properties of the four competitive swimming strokes. Forty-nine swimmers performed all-out sprints at front-crawl, backstroke, breaststroke and butterfly, each one at full stroke (FS), only the arms' stroke (AS), and only leg kicking (LK), in a total of 12 bouts, 6 per day. A speedo-meter cable was attached to the swimmer's hip, to collect the speed-time raw data (f = 50Hz). Velocity, speed fluctuation, sample entropy and fractal dimension were derived from the speed-time series...
January 10, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29313111/long-term-swimming-training-modifies-acute-immune-cell-response-to-a-high-intensity-session
#20
José P Morgado, Cristina P Monteiro, Catarina N Matias, Joana F Reis, Júlia Teles, Maria José Laires, Francisco Alves
PURPOSE: Long-term training influence on athletes' immune cell response to acute exercise has been poorly studied, despite the complexity of both chronic and acute adaptations induced by training. The purpose of the study is to study the influence of a 4-month swimming training cycle on the immune cell response to a high-intensity training session, during 24 h of recovery, considering sex, maturity, and age group. METHODS: Forty-three swimmers (16 females, 14.4 ± 1...
January 8, 2018: European Journal of Applied Physiology
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