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Overtraining

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https://www.readbyqxmd.com/read/29450135/development-of-a-specific-index-to-detect-malnutrition-in-athletes-validity-in-weight-class-or-intermittent-fasted-athletes
#1
François D Desgorces, Christophe Moinard, Mounir Chennaoui, Jean-François Toussaint, Cyril Petibois, Philippe Noirez
Fasted or weight-category athletes manage their training under strict diet conditions that could impair the stress-recovery balance and result in acute or chronic fatigue. However, to date, no validated biomarker are available to quantify this phenomena. The aim of this study was to assess the validity of a specific index combining plasma albumin and weight change to detect nutrition-related risks of fatigue increase and under-performance in athletes experiencing particular nutritional conditions. An athlete's nutrition risk index (ANRI) equation, based on data from lightweight and heavyweight rowers, was developed using relationship between plasma albumin concentrations combined to weight changes with sport performance and overtraining scores and was tested by odds ratio for failure...
June 2017: Biochimie open
https://www.readbyqxmd.com/read/29378205/coordinated-neural-behavioral-and-phenomenological-changes-in-perceptual-plasticity-through-overtraining-of-synesthetic-associations
#2
Nicolas Rothen, David J Schwartzman, Daniel Bor, Anil K Seth
Synesthesia is associated with additional perceptual experiences, which are automatically and consistently triggered by specific inducing stimuli. Synesthesia is also accompanied by more general sensory and cortical changes, including enhanced modality-specific cortical excitability. Extensive cognitive training has been shown to generate synesthesia-like phenomenology but whether these experiences are accompanied by neurophysiological changes characteristic of synesthesia remains unknown. Addressing this question provides a unique opportunity to elucidate the neural basis of perceptual plasticity relevant to conscious experiences...
January 26, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29364545/influence-of-excessive-exercise-on-immunity-metabolism-and-gut-microbial-diversity-in-an-overtraining-mice-model
#3
Xin Yuan, Shijie Xu, Haiyang Huang, Jian Liang, Yayun Wu, Chujie Li, Huiqi Yuan, Xuejie Zhao, Xiaoping Lai, Shaozhen Hou
The purpose of this study was to evaluate the negative influence of excessive exercise on immunity, substance and energy metabolism as well as gut microbiota in mice. Firstly, an overtraining model of Male Kunming mice was established by high-intensity swimming exercise for four weeks. Then, a series of evaluation indicators, including the routine blood analysis, immune organ coefficient, digestive enzymes and aquaporins expression levels of small intestine and colon tissue, histological examinations of liver, spleen, small intestine and colon, were determined based on this model...
January 24, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29345524/recovery-and-performance-in-sport-consensus-statement
#4
Michael Kellmann, Maurizio Bertollo, Laurent Bosquet, Michel Brink, Aaron Coutts, Rob Duffield, Daniel Erlacher, Shona Halson, Anne Hecksteden, Jahan Heidari, Romain Meeusen, Iñigo Mujika, Claudio Robazza, Sabrina Skorski, Ranel Venter, Jürgen Beckmann
The relationship between recovery and fatigue and its impact on performance has attracted the interest of sports science for many years. An adequate balance between stress (training and competition load, other life demands) and recovery is essential for athletes to achieve continuous high-level performance. Research has focused on the examination of physiological and psychological recovery strategies to compensate external and internal training and competition loads. A systematic monitoring of recovery and the subsequent implementation of recovery routines aims at maximizing performance and preventing negative developments such as underrecovery, non-functional overreaching, the overtraining syndrome, injuries, or illnesses...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29331586/positive-effects-of-total-recovery-period-on-anti-and-pro-inflammatory-cytokines-are-not-linked-to-performance-re-establishment-in-overtrained-mice
#5
Alisson L da Rocha, Ana P Pinto, Bruno C Pereira, Eike B Kohama, Gustavo P Morais, Larissa G de Vicente, José R Pauli, Dennys E Cintra, Eduardo R Ropelle, Leandro P de Moura, Hugo T Filho, Adelino S R da Silva
The association between excessive training sessions (i.e., overtraining/OT) and periods of inadequate recovery is linked to the nonfunctional overreaching (NFOR) state, which is defined as an unexplained decrement or stagnation of performance. The cytokine hypothesis of OT considers that pro-inflammatory cytokines are responsible by the NFOR state-induced performance decrement. Investigations using rodent models of OT verified increased levels of pro-inflammatory cytokines in hypothalamus, liver, serum and skeletal muscle samples...
January 10, 2018: Cytokine
https://www.readbyqxmd.com/read/29313445/body-composition-metabolism-sleep-psychological-and-eating-patterns-of-overtraining-syndrome-results-of-the-eros-study-eros-profile
#6
Flavio A Cadegiani, Claudio E Kater
Overtraining syndrome (OTS) is caused by an imbalance between training, nutrition and resting, and leads to decreased performance and fatigue; however, the precise underlying triggers of OTS remain unclear. This study investigated the body composition, metabolism, eating, sleeping patterns and mood states among participants with OTS. Selected participants were divided into OTS-affected athletes (OTS, n = 14), healthy athletes (ATL, n = 25), and healthy non-physically active controls (NCS, n = 12). Compared to ATL, OTS showed decreased sleep quality (p = 0...
January 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29310699/planning-a-sports-training-program-using-adaptive-particle-swarm-optimization-with-emphasis-on-physiological-constraints
#7
Nattapon Kumyaito, Preecha Yupapin, Kreangsak Tamee
OBJECTIVE: An effective training plan is an important factor in sports training to enhance athletic performance. A poorly considered training plan may result in injury to the athlete, and overtraining. Good training plans normally require expert input, which may have a cost too great for many athletes, particularly amateur athletes. The objectives of this research were to create a practical cycling training plan that substantially improves athletic performance while satisfying essential physiological constraints...
January 8, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29287751/validation-of-a-visual-spatial-secondary-task-to-assess-automaticity-in-laparoscopic-skills
#8
Richard Castillo, Juan Alvarado, Pablo Moreno, Pablo Billeke, Carlos Martínez, Julián Varas, Nicolás Jarufe
INTRODUCTION: Our objective was to assess reliability and validity of a visual-spatial secondary task (VSST) as a method to measure automaticity on a basic simulated laparoscopic skill model. In motor skill acquisition, expertise is defined by automaticity. The highest level of performance with less cognitive and attentional resources characterizes this stage, allowing experts to perform multiple tasks. Conventional validated parameters as operative time, objective assessment skills scales (OSATS), and movement economy, are insufficient to distinguish if an individual has reached the more advanced learning phases, such as automaticity...
December 26, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/29222606/hypothalamic-pituitary-adrenal-hpa-axis-functioning-in-overtraining-syndrome-findings-from-endocrine-and-metabolic-responses-on-overtraining-syndrome-eros-eros-hpa-axis
#9
Flavio A Cadegiani, Claudio E Kater
BACKGROUND: Overtraining syndrome (OTS) results from excessive training load without adequate recovery and leads to decreased performance and fatigue. The pathophysiology of OTS in athletes is not fully understood, which makes accurate diagnosis difficult. Previous studies indicate that alterations in the hypothalamus-pituitary-adrenal (HPA) axis may be responsible for OTS; however, the data is not conclusive. This study aimed to compare, through gold standard and exercise-independent tests, the response of the HPA axis in OTS-affected athletes (OTS group) to healthy physically active subjects (ATL group) and healthy non-active subjects (NCS group)...
December 8, 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/29215751/proteomic-response-of-the-rat-liver-in-differential-swimming-modes
#10
Liang Chen, Yanhua Yang, Yiting Wang, Lipeng Qiu, Hengchuan Xia, Aiai Wang, Hailong Liu, Hongfei Shi, Keping Chen
Moderate exercise helps improve competition results, providing a balanced muscle tone and biochemical activity, whereas excessive training disrupts the balance between training and recovery, causes harm to the organism, and leads to overtraining syndrome (OTS). To explore the mechanisms of different protein expressions during training and acquisition of immunity, we used proteomic analyses to investigate the differences of liver-protein expressions between two swimming modes. Sprague-Dawley rats were randomly divided into control (CT), fatigue training (FT), and exhaustive training (ET) groups, and liver tissues from each group were subjected to two-dimensional electrophoresis (2DE)...
December 7, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29163473/treadmill-slope-modulates-inflammation-fiber-type-composition-androgen-and-glucocorticoid-receptors-in-the-skeletal-muscle-of-overtrained-mice
#11
Alisson L da Rocha, Bruno C Pereira, Giovana R Teixeira, Ana P Pinto, Fabiani G Frantz, Lucila L K Elias, Fábio S Lira, José R Pauli, Dennys E Cintra, Eduardo R Ropelle, Leandro P de Moura, Rania A Mekary, Ellen C de Freitas, Adelino S R da Silva
Overtraining (OT) may be defined as an imbalance between excessive training and adequate recovery period. Recently, a downhill running-based overtraining (OTR/down) protocol induced the nonfunctional overreaching state, which is defined as a performance decrement that may be associated with psychological and hormonal disruptions and promoted intramuscular and systemic inflammation. To discriminate the eccentric contraction effects on interleukin 1beta (IL-1β), IL-6, IL-10, IL-15, and SOCS-3, we compared the release of these cytokines in OTR/down with other two OT protocols with the same external load (i...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29161758/young-athletes-health-knowledge-system-qualitative-analysis-of-health-learning-processes-in-adolescent-sportspersons
#12
Laura I Rodríguez-Serrano, Toomas Timpka, Joakim Ekberg, Örjan Dahlström, Jenny Jacobsson
Recognized side effects on health associated with sports participation in youth include overtraining, doping, and exposure to harassment and violence. Many of these effects originate in contexts where young athletes are beginning to make decisions about their sports practices on their own. This study set out to explore knowledge and reasoning about health among adolescent athletes and to describe how health knowledge management structures are associated with different social systems. Qualitative data were collected from focus groups involving 65 young Swedish athletes aged 16 to 17 years...
November 21, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29159669/thyroid-hormones-and-commonly-cited-symptoms-of-overtraining-in-collegiate-female-endurance-runners
#13
Justin X Nicoll, Disa L Hatfield, Kathleen J Melanson, Christopher S Nasin
PURPOSE: Overtraining syndrome (OTS) is reported in endurance sports. Thyroid hormones (TH) regulate metabolism, mood, and energy production, and may play a role in OTS of endurance athletes. The purpose of this study was to investigate relationships in TH and symptoms of OTS in track and field endurance runners (ER). METHODS: Sixteen female track and field middle distance (MD; n = 9; age: 20.2 ± 1.5 years; ht: 167.86 ± 5.04 cm; body-mass: 57.97 ± 5...
November 20, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29157780/growth-hormone-gh-and-prolactin-responses-to-a-non-exercise-stress-test-in-athletes-with-overtraining-syndrome-results-from-the-endocrine-and-metabolic-responses-on-overtraining-syndrome-eros-eros-stress
#14
Flavio A Cadegiani, Claudio E Kater
OBJECTIVES: Overtraining syndrome (OTS) leads to worsened sports performance and fatigue. The pathophysiology of OTS has not been entirely elucidated, and there is a lack of accurate markers for its diagnosis. Changes in hormonal responses implicated in OTS were stimulated by exercise, which has limited their interpretation. Hence, we aimed to evaluate growth hormone (GH) and prolactin responses to a gold-standard and exercise-independent stimulation test, the insulin tolerance test (ITT)...
November 16, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29137482/uphill-running-excessive-training-increases-gastrocnemius-glycogen-content-in-c57bl-6-mice
#15
G P Morais, A da Rocha, A P Pinto, L da C Oliveira, L G de Vicente, G N Ferreira, E C de Freitas, A Sr da Silva
The main aim of the present investigation was to verify the effects of three overtraining (OT) protocols performed in downhill (OTR/down), uphill (OTR/up) and without inclination (OTR) on the protein levels of Akt (Ser473), AMPKalpha (Thr172), PGC-1alpha, plasma membrane GLUT-1 and GLUT-4 as well as on the glycogen contents in mice gastrocnemius. A trained (TR) protocol was used as positive control. Rodents were divided into naive (N, sedentary mice), control (CT, sedentary mice submitted to the performance evaluations), TR, OTR/down, OTR/up and OTR groups...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29135641/the-pediatric-endurance-athlete
#16
Mary L Solomon, Susannah M Briskin, Nicole Sabatina, Jennifer E Steinhoff
Youth sports participation numbers continue to grow in the United States. A shift toward sport specialization has caused an increase in sport training frequency and intensity that places the growing athlete at risk for overtraining, nutritional deficits, and injuries. Individuals who participate in endurance sports are at especially high risk. Youth runners and swimmers are high-risk populations that require special attention to their training schedules, nutritional intake, and injuries. Appropriate scheduling of training, dedicating time to rest, and nutrition education can help prevent problems in the endurance athlete...
November 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29135639/sleep-and-athletic-performance
#17
Andrew M Watson
Sleep is an essential component of health and well-being, with significant impacts on physical development, emotional regulation, cognitive performance, and quality of life. Along with being an integral part of the recovery and adaptive process between bouts of exercise, accumulating evidence suggests that increased sleep duration and improved sleep quality in athletes are associated with improved performance and competitive success. In addition, better sleep may reduce the risk of both injury and illness in athletes, not only optimizing health but also potentially enhancing performance through increased participation in training...
November 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29052620/solving-a-higgs-optimization-problem-with-quantum-annealing-for-machine-learning
#18
Alex Mott, Joshua Job, Jean-Roch Vlimant, Daniel Lidar, Maria Spiropulu
The discovery of Higgs-boson decays in a background of standard-model processes was assisted by machine learning methods. The classifiers used to separate signals such as these from background are trained using highly unerring but not completely perfect simulations of the physical processes involved, often resulting in incorrect labelling of background processes or signals (label noise) and systematic errors. Here we use quantum and classical annealing (probabilistic techniques for approximating the global maximum or minimum of a given function) to solve a Higgs-signal-versus-background machine learning optimization problem, mapped to a problem of finding the ground state of a corresponding Ising spin model...
October 18, 2017: Nature
https://www.readbyqxmd.com/read/29024752/overtraining-modifies-spatial-memory-susceptibility-to-corticosterone-administration
#19
Alejandro Múnera, Mayerli A Prado-Rivera, D Carolina Cárdenas-Poveda, Marisol R Lamprea
Even though the effects of overtraining and glucocorticoids on different phases of spatial memory are known, the interaction between these factors on the retrieval and extinction of spatial memory has not yet been described. Adult male Wistar rats received eight training trials per day in the Barnes maze for either one or two days. Twenty-four hours after the last training trial they were randomly assigned for receiving an intraperitoneal vehicle or corticosterone injection (0.125 or 0.5 mg/kg) and ten minutes later they were given a memory test, followed by seven extinction trials...
October 9, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29018408/levels-of-hepatic-activating-transcription-factor-6-and-caspase-3-are-downregulated-in-mice-after-excessive-training
#20
Ana P Pinto, Alisson L da Rocha, Luciana da C Oliveira, Gustavo P Morais, Larissa G de Vicente, Dennys E Cintra, José R Pauli, Leandro P Moura, Eduardo R Ropelle, Adelino S R da Silva
Recently, we demonstrated that different running overtraining (OT) protocols with the same external load, but performed downhill (OTR/down), uphill (OTR/up), and without inclination (OTR), led to hepatic fat accumulation. As the disruption of endoplasmic reticulum (ER) homeostasis is linked to animal models of fatty liver disease, we investigated the effects of these OT models on the proteins related to ER stress (i.e., BiP, inositol-requiring enzyme 1, protein kinase RNA-like endoplasmic reticulum kinase, eIF2alpha, ATF6beta, and glucose-regulated protein 94) and apoptosis (C/EBP-homologous protein, Caspase-3, 4, and 12, Bax, and tumor necrosis factor receptor-associated factor 2) in livers of C57BL/6 mice...
2017: Frontiers in Endocrinology
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