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https://www.readbyqxmd.com/read/28222573/soccer-related-performance-in-eumenorrheic-tunisian-high-level-soccer-players-effects-of-menstrual-cycle-phase-and-moment-of-day
#1
Mohamed Tounsi, Hamdi Jaafar, Asma Aloui, Nizar Souissi
BACKGROUND: This study aimed to examine the combined effects of menstrual cycle phase and moment of day on female soccer players' performances in the five-jump test (5JT), the repeated shuttle- sprint ability test (RSSA), and the Yo-Yo intermittent recovery test level 1 (YYIRT1). METHODS: Eleven eumenorrheic Tunisian high-level soccer players volunteered to participate. Each subject individually participated in three testing periods: one in the early follicular phase (menses), one in the late follicular phase, and another in the luteal phase...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28222029/effect-of-cardiovascular-and-muscular-endurance-is-not-associated-with-stress-fracture-incidence-in-female-military-recruits-a-12-month-follow-up-study
#2
Mickey Scheinowitz, Ran Yanovich, Nurit Sharvit, Michal Arnon, Daniel S Moran
BACKGROUND: Stress fracture (SF) is a common injury among military recruits, especially among women, during the army basic training (ABT). The purpose of this study was to evaluate the effects of health habits and physical activity before recruitment on the fitness level and the incidence of SF during the 4-month ABT. MATERIALS AND METHODS: We screened 226 female recruit volunteers (weight: 60.5±10 kg; height: 163±6 cm) from an integrated combat unit and 124 aged-matched female controls (weight: 57...
February 21, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28213101/additively-manufactured-metallic-porous-biomaterials-based-on-minimal-surfaces-a-unique-combination-of-topological-mechanical-and-mass-transport-properties
#3
F S L Bobbert, K Lietaert, A A Eftekhari, B Pouran, S M Ahmadi, H Weinans, A A Zadpoor
: Porous biomaterials that simultaneously mimic the topological, mechanical, and mass transport properties of bone are in great demand but are rarely found in the literature. In this study, we rationally designed and additively manufactured (AM) porous metallic biomaterials based on four different types of triply periodic minimal surfaces (TPMS) that mimic the properties of bone to an unprecedented level of multi-physics detail. Sixteen different types of porous biomaterials were rationally designed and fabricated using selective laser melting (SLM) from a titanium alloy (Ti-6Al-4V)...
February 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28199417/physical-activity-prevents-alterations-in-mitochondrial-ultrastructure-and-glucometabolic-parameters-in-a-high-sugar-diet-model
#4
Karina Barbosa de Queiroz, Kinulpe Honorato-Sampaio, Joamyr Victor Rossoni Júnior, Diego Andrade Leal, Angélica Barbosa G Pinto, Lenice Kappes-Becker, Elisio Alberto Evangelista, Renata Guerra-Sá
Endurance exercise is a remarkable intervention for the treatment of many diseases. Mitochondrial changes on skeletal muscle are likely important for many of the benefits provided by exercise. In this study, we aimed to evaluate the effects that a regular physical activity (swimming without workload) has on mitochondrial morphological alterations and glucometabolic parameters induced by a high-sugar diet (HSD). Weaned male Wistar rats fed with a standard diet or a HSD (68% carbohydrate) were subjected to 60 minutes of regular physical activity by swimming (without workload) for four- (20 sessions) or eight-week (40 sessions) periods...
2017: PloS One
https://www.readbyqxmd.com/read/28197103/increases-in-brain-1-h-mr-glutamine-and-glutamate-signals-following-acute-exhaustive-endurance-exercise-in-the-rat
#5
Maciej Świątkiewicz, Michał Fiedorowicz, Jarosław Orzeł, Marlena Wełniak-Kamińska, Piotr Bogorodzki, Józef Langfort, Paweł Grieb
Objective: Proton magnetic resonance spectroscopy ((1)H-MRS) in ultra-high magnetic field can be used for non-invasive quantitative assessment of brain glutamate (Glu) and glutamine (Gln) in vivo. Glu, the main excitatory neurotransmitter in the central nervous system, is efficiently recycled between synapses and presynaptic terminals through Glu-Gln cycle which involves glutamine synthase confined to astrocytes, and uses 60-80% of energy in the resting human and rat brain. During voluntary or involuntary exercise many brain areas are significantly activated, which certainly intensifies Glu-Gln cycle...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28196550/genetic-and-environmental-influences-on-last-year-major-depression-in-adulthood-a-highly-heritable-stable-liability-but-strong-environmental-effects-on-1-year-prevalence
#6
K S Kendler, C O Gardner
BACKGROUND: This study seeks to clarify the contribution of temporally stable and occasion-specific genetic and environmental influences on risk for major depression (MD). METHOD: Our sample was 2153 members of female-female twin pairs from the Virginia Twin Registry. We examined four personal interview waves conducted over an 8-year period with MD in the last year defined by DSM-IV criteria. We fitted a structural equation model to the data using classic Mx. The model included genetic and environmental risk factors for a latent, stable vulnerability to MD and for episodes in each of the four waves...
February 15, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28194080/estimation-of-work-capacity-and-work-ability-among-plantation-workers-in-south-india
#7
Suguna Anbazhagan, Naveen Ramesh, A Surekha, Farah N Fathima, Melina, Anjali
BACKGROUND: Work capacity is the ability to perform real physical work, and work ability is a result of interaction of worker to his or her work that is how good a worker is at present, in near future, and how able is he or she to do his or her work with respect to work demands and health and mental resources. OBJECTIVE: To assess the work capacity and work ability and to study the factors associated with work capacity and work ability of workers at a tea plantation in South India...
May 2016: Indian Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28192512/explosive-strength-and-endurance-adaptations-in-young-elite-soccer-players-during-two-soccer-seasons
#8
Riccardo Di Giminiani, Christiano Visca
The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years; body weight: 57.9 ± 4.9 kg; height: 168.9 ± 4.7 cm; BMI: 20.1 ± 1.1 kg/m2), voluntarily participated in the present study. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3)...
2017: PloS One
https://www.readbyqxmd.com/read/28187054/effects-of-an-8-week-aerobic-dance-program-on-health-related-fitness-in-patients-with-schizophrenia
#9
Shu-Li Cheng, Huey-Fang Sun, Mei-Ling Yeh
BACKGROUND: Both psychiatric symptoms and the side effects of medication significantly affect patients with schizophrenia. These effects frequently result in a sedentary lifestyle and weight gain, which increase the risk of cardiovascular disease and premature death. PURPOSE: This study developed an aerobic dance program for patients with schizophrenia and then evaluated the effect of this program on health-related fitness outcomes. METHODS: An experimental research design was used...
February 9, 2017: Journal of Nursing Research: JNR
https://www.readbyqxmd.com/read/28183441/similar-metabolic-response-to-lower-versus-upper-body-interval-exercise-or-endurance-exercise
#10
Monique E Francois, Matthew J Graham, Evelyn B Parr, Nancy J Rehrer, Samuel J E Lucas, Stasinos Stavrianeas, James D Cotter
PURPOSE: To compare energy use and substrate partitioning arising from repeated lower- versus upper-body sprints, or endurance exercise, across a 24-h period. METHODS: Twelve untrained males (24±4 y) completed three trials in randomized order: (1) repeated sprints (five 30-s Wingate, 4.5-min recovery) on a cycle ergometer (SITLegs); (2) 50-min continuous cycling at 65% V̇O2max (END); (3) repeated sprints on an arm-crank ergometer (SITArms). Respiratory gas exchange was assessed before and during exercise, and at eight points across 22h of recovery...
March 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28182449/the-family-environment-in-early-childhood-has-a-long-term-effect-on-self-esteem-a-longitudinal-study-from-birth-to-age-27-years
#11
Ulrich Orth
A better understanding is needed of the factors that shape the development of individual differences in self-esteem. Using a prospective longitudinal design, this research tested whether the family environment in early childhood predicts self-esteem in later developmental periods. Data came from a nationally representative U.S. sample of 8,711 participants, who reported on their self-esteem biannually from age 8 to 27 years. Moreover, during the participants' first 6 years of life, biannual assessments of their mothers provided information on the quality of the home environment (covering quality of parenting, cognitive stimulation, and physical home environment), quality of parental relationship, presence of father, maternal depression, and poverty status of the family...
February 9, 2017: Journal of Personality and Social Psychology
https://www.readbyqxmd.com/read/28181710/on-field-prediction-vs-monitoring-of-aerobic-capacity-markers-using-submaximal-lactate-and-heart-rate-measures
#12
Ibai Garcia-Tabar, Mikel Izquierdo, Esteban M Gorostiaga
This study aimed to validate the use of a single blood lactate concentration measurement taken following a 5-min running bout at 10 km·h(-1) (BLC10 ) and the speed associated with 90% of maximal heart rate (S90 ) to predict and monitor fixed blood lactate concentration (FBLC) thresholds in athletes. Three complementary studies were undertaken. Study-I: A cross-sectional study examining the associations of BLC10 and S90 with running speeds at FBLC of 3 (S3mM) and 4 mmol·L(-1) (S4mM) in 100 athletes. Study-II: A cross-validation study assessing the predictive capacity of BLC10 and S90 to estimate FBLC thresholds in real practice...
February 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28177737/peak-oxygen-uptake-in-a-sprint-interval-testing-protocol-vs-maximal-oxygen-uptake-in-an-incremental-testing-protocol-and-their-relationship-with-cross-country-mountain-biking-performance
#13
Rafał Hebisz, Paulina Hebisz, Marek Zatoń, Kamil Michalik
The literature finds that the exercise capacity of cyclists is typically assessed using incremental and endurance exercise tests. The aim of the present study was to confirm whether peak oxygen uptake (VO2peak) attained in a sprint interval testing protocol correlated with cycling performance and whether it corresponds to maximal oxygen uptake (VO2max) determined by an incremental testing protocol. A sample of 28 trained mountain bike cyclists executed three performance tests: a) incremental testing protocol (ITP) in which the participant cycled to volitional exhaustion, b) sprint interval testing protocol (SITP) composed of four 30-s maximal intensity cycling bouts interspersed with 90-s recovery periods, c) competition in a simulated MTB race...
December 12, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28167756/climate-change-is-projected-to-have-severe-impacts-on-the-frequency-and-intensity-of-peak-electricity-demand-across-the-united-states
#14
Maximilian Auffhammer, Patrick Baylis, Catherine H Hausman
It has been suggested that climate change impacts on the electric sector will account for the majority of global economic damages by the end of the current century and beyond [Rose S, et al. (2014) Understanding the Social Cost of Carbon: A Technical Assessment]. The empirical literature has shown significant increases in climate-driven impacts on overall consumption, yet has not focused on the cost implications of the increased intensity and frequency of extreme events driving peak demand, which is the highest load observed in a period...
February 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28166943/cold-adaptive-thermogenesis-following-consumption-of-certain-pungent-spice-principles-a-validation-study
#15
Chaitanya Pandit, K R Anilakumar
Identifying a means to activate or potentiate thermogenic mechanisms through ingestion of dietary compounds have important implications in cold endurance and survival. Although many reports discuss the thermogenic potential of spices, it is surprising that none of the studies verify whether consumption of spices can improve cold endurance. In this study, we have attempted to evaluate if ingestion of certain spices can activate heat-generating mechanisms in the body such that a fall in. core body temperature (CBT) can be delayed or prevented when faced with a cold challenge...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28161872/total-energy-expenditure-energy-intake-and-body-composition-in-endurance-athletes-across-the-training-season-a-systematic-review
#16
REVIEW
Juliane Heydenreich, Bengt Kayser, Yves Schutz, Katarina Melzer
BACKGROUND: Endurance athletes perform periodized training in order to prepare for main competitions and maximize performance. However, the coupling between alterations of total energy expenditure (TEE), energy intake, and body composition during different seasonal training phases is unclear. So far, no systematic review has assessed fluctuations in TEE, energy intake, and/or body composition in endurance athletes across the training season. The purpose of this study was to (1) systematically analyze TEE, energy intake, and body composition in highly trained athletes of various endurance disciplines and of both sexes and (2) analyze fluctuations in these parameters across the training season...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28148629/monitoring-long-term-efficacy-of-fampridine-in-gait-impaired-patients-with-multiple-sclerosis
#17
Linard Filli, Björn Zörner, Sandra Kapitza, Katja Reuter, Lilla Lörincz, David Weller, Tabea Sutter, Tim Killeen, Philipp Gruber, Jens A Petersen, Michael Weller, Michael Linnebank
OBJECTIVE: To expand upon the limited knowledge of the long-term effects of prolonged-release (PR) fampridine in patients with multiple sclerosis (PwMS) regarding safety, walking improvements, and changes in drug responsiveness. METHODS: Fifty-three PwMS who completed the FAMPKIN core study were included in this extension trial. Drug efficacy was assessed in an open-label and randomized double-blind, placebo-controlled study design with regular baseline assessments over a period of 2 years using the Timed 25-Foot Walk (T25FW), 6-Minute Walk Test (6MWT), and 12-item MS Walking Scale (MSWS-12) as outcome measures...
February 1, 2017: Neurology
https://www.readbyqxmd.com/read/28144902/ameliorative-effects-of-endurance-exercise-with-two-different-intensities-on-nandrolone-decanoate-induced-neurodegeneration-in-rats-involving-redox-and-apoptotic-systems
#18
Siyavash Joukar, Reza Vahidi, Alireza Farsinejad, Majid Asadi-Shekaari, Beydolah Shahouzehi
Despite the importance of this issue, less has been paid to the influence of exercise on the neural side effects of anabolic androgenic steroids and mechanisms. We investigated the effects of two levels of endurance exercise on neurodegeneration side effects of nandrolone. The study period was 8 weeks. Wistar rats were divided into nine groups including the control (CTL) group, mild exercise (mEx) group, and vehicle (Arach) group which received arachis oil intramuscularly, nandrolone (Nan) group which received nandrolone decanoate 5 mg/kg two times weekly, mEx+Arach group which treated with arachis oil along with mild exercise, mEx+Nan group which treated with nandrolone along with mild exercise, severe exercise (sEx) group, sEx+Arach, and sEx+Nan groups...
January 31, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28140436/en-route-intraosseous-access-performed-in-the-combat-setting
#19
Shelia Savell, Alejandra G Mora, Crystal A Perez, Vikhyat S Bebarta, Maj Joseph K Maddry
OBJECTIVE: To describe and compare vascular access practices used by en route care providers during medical evacuation (MEDEVAC). DESIGN: This was a retrospective cohort study. Medical records of US military personnel injured in combat and transported by MEDEVAC teams were queried. PATIENTS: The subjects were transported by military en route care providers, in the combat theater during Operation Enduring Freedom (OEF) between January 2011 and March 2014...
October 2016: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28135217/short-term-hypoxic-exposure-and-training-improve-maximal-anaerobic-running-test-performance
#20
Marie Oriishi, Takeo Matsubayashi, Takashi Kawahara, Yasuhiro Suzuki
The purpose of this study was to examine the effectiveness of short-term hypoxic exposure and training in the performance of competitive 400 m or 800 m runners. Fifteen female competitive 400 m and 800 m runners volunteered to participate and were assigned to either the hypoxic (n = 7) or normoxic (n = 8) group. The subjects completed 6 days of training. The hypoxic group trained and slept in normobaric hypoxia, with oxygen concentrations of 14.4% and 16.5% for training and sleep, respectively. The normoxic group trained and slept at sea level...
January 20, 2017: Journal of Strength and Conditioning Research
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