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Periodization endurance

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https://www.readbyqxmd.com/read/28723843/no-superior-adaptations-to-carbohydrate-periodization-in-elite-endurance-athletes
#1
Kasper Degn Gejl, Line Thams, Mette Hansen, Torben Rokkedal-Lausch, Peter Plomgaard, Lars Nybo, Filip J Larsen, Daniele A Cardinale, Kurt Jensen, Hans-Christer Holmberg, Kristian Vissing, Niels Ørtenblad
PURPOSE: The present study investigated the effects of periodic CHO restriction on endurance performance and metabolic markers in elite endurance athletes. METHODS: Twenty-six male elite endurance athletes (VO2max: 65.0 ml O2[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed 4 weeks of regular endurance training, while matched and randomized into two groups training with (Low) or without (High) carbohydrate (CHO) manipulation three days a week. The CHO manipulation days consisted of a 1-hr high intensity bike session in the morning, recovery for 7 hrs while consuming isocaloric diets containing either high CHO (414±2...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28723812/effects-of-12-weeks-resistance-training-on-sprint-and-jump-performance-in-competitive-adolescent-rugby-union-players
#2
Simon K Harries, David R Lubans, Anthony Buxton, Thomas H J MacDougall, Robin Callister
Sprint performance is an important characteristic for success in many sports, including rugby union. Resistance training is used to increase muscular fitness (i.e. strength, endurance and power) and may also be effective for improving sprint and jump performances. The aims of this study were to examine the effects of resistance training using two different periodized programs (linear and daily undulating) on sprint and jump performance and explore relationships between performance measures. Sixteen male (16...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28720852/quantum-critical-scaling-under-periodic-driving
#3
Salvatore Lorenzo, Jamir Marino, Francesco Plastina, G Massimo Palma, Tony J G Apollaro
Universality is key to the theory of phase transitions, stating that the equilibrium properties of observables near a phase transition can be classified according to few critical exponents. These exponents rule an universal scaling behaviour that witnesses the irrelevance of the model's microscopic details at criticality. Here we discuss the persistence of such a scaling in a one-dimensional quantum Ising model under sinusoidal modulation in time of its transverse magnetic field. We show that scaling of various quantities (concurrence, entanglement entropy, magnetic and fidelity susceptibility) endures up to a stroboscopic time τ bd , proportional to the size of the system...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28712160/perspectives-on-childhood-resilience-among-the-aboriginal-community-an-interview-study
#4
Christian Young, Allison Tong, Janice Nixon, Peter Fernando, Deanna Kalucy, Simone Sherriff, Kathleen Clapham, Jonathan C Craig, Anna Williamson
OBJECTIVE: To describe Aboriginal community members' perspectives on the outcomes and origins of resilience among Aboriginal children. METHODS: Face-to-face interviews were conducted with 36 Aboriginal adults (15 health service professionals, 8 youth workers and 13 community members) at two urban and one regional Aboriginal Community Controlled Health Service in New South Wales. Interviews were transcribed and analysed thematically. RESULTS: We identified six themes: withstanding risk (displaying normative development, possessing inner fortitude); adapting to adversity (necessary endurance, masking inner vulnerabilities); positive social influences (secure family environments, role modelling healthy behaviours and relationships); instilling cultural identity (investing in Aboriginal knowledge, building a strong cultural self-concept); community safeguards (offering strategic sustainable services, holistic support, shared responsibility, providing enriching opportunities); and personal empowerment (awareness of positive pathways, developing self-respect, fostering positive decision making)...
July 16, 2017: Australian and New Zealand Journal of Public Health
https://www.readbyqxmd.com/read/28709783/role-of-the-lateral-habenula-in-memory-through-online-processing-of-information
#5
REVIEW
Victor Mathis, Lucas Lecourtier
Our memory abilities, whether they involve short-term working memory or long-term episodic or procedural memories, are essential for our well-being, our capacity to adapt to constraints of our environment and survival. Therefore, several key brain regions and neurotransmitter systems are engaged in the processing of sensory information to either maintain such information in working memory so that it will quickly be used, and/or participate in the elaboration and storage of enduring traces useful for longer periods of time...
July 11, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28709116/morbidity-persistence-and-comorbidity-of-mood-anxiety-and-eating-disorders-among-preoperative-bariatric-patients
#6
Leorides Severo Duarte-Guerra, Bruno Mendonça Coêlho, Marco Aurélio Santo, Francisco Lotufo-Neto, Yuan-Pang Wang
The current study investigates the patterns of disease persistence and comorbidity of psychiatric disorders among patients with class III obesity in pre-operative period. For 393 treatment-seeking patients with severe obesity recruited from a bariatric center, we ascertained their psychiatric diagnosis through Structured Clinical Interview for DSM-IV (SCID-I). Following, the frequency, persistence and comorbidity pattern of psychiatric disorders in this sample were determined. Current psychiatric disorders were observed in over half of patients during preoperative period, being anxiety disorders the most frequent diagnosis...
July 10, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28702901/implications-of-impaired-endurance-peffects-of-endurance-training-orformance-following-single-bouts-of-resistance-training-an-alternate-concurrent-training-perspective
#7
REVIEW
Kenji Doma, Glen B Deakin, David J Bentley
A single bout of resistance training induces residual fatigue, which may impair performance during subsequent endurance training if inadequate recovery is allowed. From a concurrent training standpoint, such carry-over effects of fatigue from a resistance training session may impair the quality of a subsequent endurance training session for several hours to days with inadequate recovery. The proposed mechanisms of this phenomenon include: (1) impaired neural recruitment patterns; (2) reduced movement efficiency due to alteration in kinematics during endurance exercise and increased energy expenditure; (3) increased muscle soreness; and (4) reduced muscle glycogen...
July 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28701725/prospective-study-on-association-of-prostatic-calcifications-with-clinical-symptoms-and-results-of-treatment-in-men-with-type-iii-prostatitis
#8
Xiang Fei, Wei Jin, Shengyu Hua, Yan Song
The purpose is to investigate the clinical significance of prostatic calculi in patients with chronic prostatitis and to discuss the possible treatment.The data from 277 young males with CP/CPPS were analyzed prospectively. Symptom severity was measured using the National Institutes of Health Chronic Prostatitis Symptom Index (NIH-CPSI) and the International Prostatic Symptoms Score (IPSS). Sexual function was assessed by the International Index of Erectile Function (IIEF-5) questionnaire. After four weeks of therapy, the NIH-CPSI, IPSS, and IIEF-5 tests were repeated...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28699087/effects-of-endurance-training-on-autophagy-and-apoptotic-signaling-in-visceral-adipose-tissue-of-prolonged-high-fat-diet-fed-rats
#9
Sílvia Rocha-Rodrigues, Inês O Gonçalves, Jorge Beleza, António Ascensão, José Magalhães
PURPOSE: Autophagy and apoptosis play critical roles in both development and tissue homeostasis in response to (patho)physiological stimuli, such as high-fat diet (HFD) and endurance training (ET). Therefore, we aimed to investigate how ET modulates autophagy and apoptotic-related signaling in visceral adipose tissue of long-standing HFD-fed rats. METHODS: The study was conducted over a 17-week period on Sprague-Dawley rats, which were divided into four groups (n = 8/group): standard diet sedentary (STD+SED), high-fat diet sedentary (HFD+SED), standard diet ET (STD+ET) and high-fat diet ET (HFD+ET)...
July 11, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28686083/ischemic-preconditioning-enhances-critical-power-during-a-3-minute-all-out-cycling-test
#10
Patrick J Griffin, Richard A Ferguson, Conor Gissane, Stephen J Bailey, Stephen D Patterson
This study tested the hypothesis that ischemic preconditioning (IPC) would increase critical power (CP) during a 3 minute all-out cycling test. Twelve males completed two 3 minute all-out cycling tests, in a crossover design, separated by 7 days. These tests were preceded by IPC (4 x 5 minute intervals at 220 mmHg bilateral leg occlusion) or SHAM treatment (4 x 5 minute intervals at 20 mmHg bilateral leg occlusion). CP was calculated as the mean power output during the final 30 s of the 3 minute test with W' taken as the total work done above CP...
July 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28680108/behavioral-inefficiency-on-a-risky-decision-making-task-in-adulthood-after-adolescent-intermittent-ethanol-exposure-in-rats
#11
Kelsey M Miller, Mary-Louise Risher, Shawn K Acheson, Matthew Darlow, Hannah G Sexton, Nicole Schramm-Sapyta, H S Swartzwelder
Adolescence is a period of development in neural circuits that are critical for adult functioning. There is a relationship between alcohol exposure and risky decision-making, though the enduring effects of adolescent ethanol exposure on risky decision-making in adulthood have not been fully explored. Studies using positive reinforcement have shown that adolescent intermittent ethanol (AIE) exposure results in higher levels of risky decision-making in adulthood, but the effects of AIE on punishment-mediated decision-making have not been explored...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28679793/light-oiling-of-feathers-increases-flight-energy-expenditure-in-a-migratory-shorebird
#12
Ivan Maggini, Lisa V Kennedy, Alexander Macmillan, Kyle H Elliott, Karen Dean, Christopher G Guglielmo
Flying birds depend on their feathers to undertake most activities, and maintain them in peak condition through periodic molt and frequent preening. Even small exposures to crude oil reduce the integrity of feathers, and could impair flight performance. We trained wild western sandpipers (Calidris mauri) to perform endurance flights in a wind tunnel, and used magnetic resonance body composition analysis to measure energy expenditure after birds were exposed to weathered MC252 crude oil from the Deepwater Horizon oil spill...
July 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28676984/the-regulation-of-heat-shock-proteins-in-response-to-dehydration-in-xenopus-laevis
#13
Bryan E Luu, Sanoji Wijenayake, Amal I Malik, Kenneth B Storey
African clawed frogs (Xenopus laevis) endure bouts of severe drought in their natural habitats and survive the loss of approximately 30% of total body water due to dehydration. To investigate molecular mechanisms employed by X. laevis during periods of dehydration, the heat shock protein response, a vital component of the cytoprotective stress response, was characterized. Using western immunoblotting and multiplex technology, the protein levels of HSP27, HSP40, HSP60, HSP70, HSC70, and HSP90 were quantified in the liver, skeletal muscle, kidney, lung, and testes from control frogs and those that underwent medium or high dehydration (~16 or ~30% loss of total body water)...
July 5, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28662821/the-role-of-matrix-metalloproteinases-in-development-repair-and-destruction-of-the-lungs
#14
Amanda Y Hendrix, Farrah Kheradmand
Normal gas exchange after birth requires functional lung alveolar units that are lined with epithelial cells, parts of which are intricately fused with microvascular capillaries. A significant phase of alveolar lung development occurs in the perinatal period, continues throughout early stages in life, and requires activation of matrix-remodeling enzymes. Failure to achieve an optimum number of alveoli during lung maturation can cause several untoward medical consequences including disabling obstructive and/or restrictive lung diseases that limit physiological endurance and increase mortality...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28658073/monitoring-changes-in-power-speed-agility-and-endurance-in-elite-cricketers-during-the-off-season
#15
Chris Bishop, Ross Herridge, Anthony Turner
The purpose of this study was to monitor changes in power, speed, agility and endurance in elite cricketers during the 20-week off-season period. Fourteen elite male cricketers (age 26.2 ± 5.3years; height 180.8 ± 8.5cm; mass 83.5 ± 6.7kg) conducted a physical testing battery in week 1 and week 18 of the off-season period. The testing included a yoyo intermittent recovery test (yoyo IRT), bilateral and unilateral countermovement jumps (CMJ), squat jump (SJ), broad jump (BJ), drop jump (to calculate reactive strength index - [RSI]), pro agility and 5, 10, 20m sprint tests...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28657933/impact-of-hsct-conditioning-and-glucocorticoid-dose-on-exercise-adherence-and-response
#16
Joachim Wiskemann, Benedikt Herzog, Rea Kuehl, Martina E Schmidt, Karen Steindorf, Rainer Schwerdtfeger, Peter Dreger, Martin Bohus
PURPOSE: Evidence from randomized controlled trials (RCT) is growing that exercise interventions have beneficial effects in patients undergoing allogeneic stem cell transplantation (allo-HSCT). However, intensive chemotherapy conditioning as well as glucocorticoid (GC) treatment is always part of an allo-HSCT and possibly impact exercise adherence and training response. Therefore, we aimed to examine whether various conditioning protocols or different doses of GC treatment affect exercise adherence and/or training response during the inpatient period...
June 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28657863/carbohydrate-intake-and-training-efficacy-a-randomized-cross-over-study
#17
Florian Beaudouin, Frederic Joerg, Anette Hilpert, Tim Meyer, Anne Hecksteden
Carbohydrate (CHO) availability during endurance exercise seems to attenuate exercise-induced perturbations of cellular homeostasis and might consequently diminish the stimulus for training adaptation. Therefore, a negative effect of CHO intake on endurance training efficacy seems plausible. This study aimed to test the influence of carbohydrate intake on the efficacy of an endurance training program on previously untrained healthy adults. A randomized cross-over trial (8-week wash-out period) was conducted in 23 men and women with two 8-week training periods (with vs...
June 28, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28657821/a-scientific-approach-to-improve-physiological-capacity-of-an-elite-cyclist
#18
Bent R Rønnestad, Joar Hansen
Previous studies in endurance athletes has indicated that block periodization (BP) can be a good alternative to the more traditional organization of training despite the total volume and intensity of the training being similar. However, these studies usually last only 4-12 weeks. The aim of the present single-case study was to investigate the consequences of 58 weeks with systematic BP of low intensity training (LIT), moderate intensity training (MIT) and high intensity interval training (HIT) including incorporation of heavy strength training...
June 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28656283/effects-of-moderate%C3%A2-intensity-endurance-exercise-on-angiotensin-ii-and-angiotensin-ii-type-i-receptors-in-the-rat-heart
#19
Xin Li, Kun Wang
The current study was aimed at examining the effects of moderate‑intensity endurance exercise on the expression of angiotensin II (AngII) and AngII type 1 receptor (AT1R) in the rat heart. Male Sprague‑Dawley rats were randomly divided into the control group (n=20) and moderate‑intensity endurance exercise group (n=20). Cardiac hypertrophy was induced by treadmill endurance training for 8 weeks. The mRNA expression of AngII and AT1R were assessed by reverse transcription‑quantitative polymerase chain reaction...
June 27, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28654503/effectiveness-of-functional-power-training-on-walking-ability-in-young-children-with-cerebral-palsy-study-protocol-of-a-double-baseline-trial
#20
Liesbeth F van Vulpen, Sonja de Groot, Eugene A A Rameckers, Jules G Becher, Annet J Dallmeijer
PURPOSE: To evaluate the effect of functional high-velocity resistance (power) training to improve walking ability of young children with cerebral palsy. METHODS: Twenty-two children with bi- or unilateral spastic cerebral palsy, Gross Motor Function Classification System levels I and II, aged 4 to 10 years will be recruited. A double-baseline design will be used to compare a 14-week functional power training (3 times a week) program with a 14-week usual care period and a 14-week follow-up period...
July 2017: Pediatric Physical Therapy
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