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https://www.readbyqxmd.com/read/28933813/facile-and-effective-coloration-of-dye-inert-carbon-fiber-fabrics-with-tunable-colours-and-excellent-laundering-durability
#1
Fengxiang Chen, Huiyu Yang, Ke Li, Bo Deng, Qingsong Li, Xin Liu, Binghai Dong, Xingfang Xiao, Dong Wang, Yong Qin, Shi-Min Wang, Ke-Qin Zhang, Weilin Xu
Carbon fiber is a good candidate in various applications, including military, structural, sports equipment, energy storage, and infrastructure. Coloring of carbon fiber has been a big challenge for decades due to their high degrees of crystallization and insufficient chemical affinity to dyes. Here, multicolored carbon fiber fabrics (CFFs) are fabricated using a feasible, effective atomic layer deposition (ALD) technique. The vibrant and uniform structural colors originate from thin film interference is simply regulated by controlling the thickness of comformal TiO2 coatings on the surface of black carbon fibers (CFs)...
September 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28925889/physical-activity-does-it-really-increase-bone-density-in-postmenopausal-women-a-review-of-articles-published-between-2001-2016
#2
Daria Segev, Devora Hellerstein, Ayelet Dunsky
BACKGROUND: Physical activity is known for its many health benefits, among them the positive effect on bone health during the life cycle. During childhood, physical stress stimulates bone remodeling and increases density. However, due to hormonal changes during adulthood, and mainly during postmenopause the rate of bone remodeling is slowed and is less efficient. As a result, argument has arisen in the literature regarding the benefit or harm of physical activity on bone health among postmenopausal women...
September 18, 2017: Current Aging Science
https://www.readbyqxmd.com/read/28924314/comparison-between-standing-broad-jump-test-and-wingate-test-for-assessing-lower-limb-anaerobic-power-in-elite-sportsmen
#3
Anup Krishnan, Deep Sharma, Madhu Bhatt, Apoorv Dixit, P Pradeep
BACKGROUND: Lower limb explosive power is an important motor quality for sporting performance and indicates use of anaerobic energy systems like stored ATP and Creatine phosphate system. Weightlifting, Fencing and Wrestling use it for monitoring and identification of potential sportsmen. The Wingate test and Standing Broad Jump (SBJ) test are reliable and accurate tests for its assessment. This study conducted on elite Indian sportsmen tries to analyse feasibility of use of the SBJ test in sports and military medicine when Wingate test is impractical...
April 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28923517/bicycle-helmet-use-patterns-in-italy-a-description-and-analysis-of-survey-data-from-an-italian-friends-of-cycling-association
#4
Ioana Popa, Ottavia E Ferraro, Chiara Orsi, Anna Morandi, Cristina Montomoli
Cycling is becoming one of the most popular forms of recreation and transport the world over, but cyclists still have a high level of vulnerability. A bicycle helmet is an important safety device available to cyclists, but little is known regarding possible determinants of helmet use among adults. This study aims at providing information on helmet usage patterns in Italy and identifying the factors associated with bicycle helmet use. Data on 2072 bicycle riders from an Italian friends of cycling association aged 18 years or older who had ridden a bicycle in the last month were collected using an ad-hoc questionnaire via the web...
September 15, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28915945/potentiometric-sensor-for-non-invasive-lactate-determination-in-human-sweat
#5
Massimo Onor, Stefano Gufoni, Tommaso Lomonaco, Silvia Ghimenti, Pietro Salvo, Fiodor Sorrentino, Emilia Bramanti
The present work describes a non invasive lactate sensing in sweat during workout. The sensing system is based on a non-equilibrium potentiometric measure performed using disposable, chemically modified, screen printed carbon electrodes (SPCEs) that can be wetted with sweat during the exercise. The potentiometric signal, which is proportional to lactate concentration in sweat, is produced by a redox reaction activated by UV radiation, as opposed to the enzymatic reaction employed in traditional, blood-based measuring devices...
October 9, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28913369/changes-in-the-width-of-the-tibiofibular-syndesmosis-related-to-lower-extremity-joint-dynamics-and-neuromuscular-coordination-on-drop-landing-during-the-menstrual-cycle
#6
Michie Okazaki, Masaaki Kaneko, Yukisato Ishida, Norio Murase, Toshihito Katsumura
BACKGROUND: Many injuries of the lower extremities, especially the knee and ankle, occur during sports activity, and the incidence rate is higher in women than in men. HYPOTHESIS: The hypothesis was that phases of the menstrual cycle affect the width of the tibiofibular syndesmosis during drop landing in healthy young women and that such changes at the tibiofibular joint also affect the dynamics and neuromuscular coordination of the lower extremities. STUDY DESIGN: Descriptive laboratory study...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28902109/validity-and-reliability-of-the-stages-cycling-power-meter
#7
Cyril Granier, Christophe Hausswirth, Sylvain Dorel, Le Meur Yann
PURPOSE: This study aimed to determine the validity and the reliability of the Stages power meter crank system (Boulder, United States) during several laboratory cycling tasks. METHODS: Eleven trained participants completed laboratory cycling trials on an indoor cycle fitted with SRM Professional and Stages systems. The trials consisted of an incremental test at 100W, 200W, 300W, 400W and four 7s sprints. The level of pedaling asymmetry was determined for each cycling intensity during a similar protocol completed on a Lode Excalibur Sport ergometer...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28900862/the-influence-of-growth-and-maturation-on-stretch-shortening-cycle-function-in-youth
#8
REVIEW
John M Radnor, Jon L Oliver, Charlie M Waugh, Gregory D Myer, Isabel S Moore, Rhodri S Lloyd
Hopping, skipping, jumping and sprinting are common tasks in both active play and competitive sports. These movements utilise the stretch-shortening cycle (SSC), which is considered a naturally occurring muscle action for most forms of human locomotion. This muscle action results in more efficient movements and helps optimise relative force generated per motor unit recruited. Innate SSC development throughout childhood and adolescence enables children to increase power (jump higher and sprint faster) as they mature...
September 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28895388/probiotic-strains-as-the-element-of-nutritional-profile-in-physical-activity-%C3%A2-new-trend-or-better-sports-results
#9
Joanna Smarkusz, Lucyna Ostrowska, Katarzyna Witczak-Sawczuk
A diet, individually customized to the needs of sportsmen and sportswomen prepares them better for competition and achievement of better sports results. However, disorders of the gastrointestinal tract and frequently recurrent upper respiratory tract infections pose a common problem observed among athletes of disciplines such as triathlon, cycling and marathon. Diarrhea, splashing in the intestines or gastrointestinal bleeding make it difficult to start and win in the race. Recently researchers have paid special attention to the therapeutic effect of probiotic strains on the human body...
2017: Roczniki Państwowego Zakładu Higieny
https://www.readbyqxmd.com/read/28887865/plasma-rich-plasma-the-ultimate-secret-for-youthful-skin-elixir-and-hair-growth-triggering
#10
REVIEW
Ebtisam Elghblawi
The clinical application of platelet-rich plasma (PRP) is based on the increase in the concentration of growth factors that are released from alpha-granule of the concentrated platelets and in the secretion of proteins which are able to capitalize on the healing process at the cellular level. It has been invented to restore the natural beauty by starting the natural rejuvenation process of the skin and aiming to make it function as a younger one and to keep the skin youthful and maintain it. Besides that, it is also emerged to include hairs as a new injectable procedure to enable stimulating hair growth locally and topically; preventing its fall; improving hair shaft, hair stem, and its caliber; increasing its shine, vitality, and pliability; and declining hair splitting and breakage...
September 8, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28886923/the-effect-of-12-month-participation-in-osteogenic-and-non-osteogenic-sports-on-bone-development-in-adolescent-male-athletes-the-pro-bone-study
#11
Dimitris Vlachopoulos, Alan R Barker, Esther Ubago-Guisado, Francisco B Ortega, Peter Krustrup, Brad Metcalf, Jose Castro Pinero, Jonatan R Ruiz, Karen M Knapp, Craig A Williams, Luis A Moreno, Luis Gracia-Marco
OBJECTIVES: Research investigating the longitudinal effects of the most popular sports on bone development in adolescent males is scarce. The aim is to investigate the effect of 12-month participation in osteogenic and non-osteogenic sports on bone development. DESIGN: A 12-month study was conducted in adolescent males involved in football, swimming and cycling and compared with an active control group. METHODS: 116 adolescent males (13.1±0...
September 1, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28886819/nutritional-aspects-of-the-female-athlete
#12
REVIEW
Kelly A Rossi
Athletes have specific needs based on sex, size, sport, exercise intensity, duration of activity, phase of training, and the season in which the sport is played. Nutritionally, the female athlete is unique, with needs that may vary based on hormonal fluctuations related to the menstrual cycle. This article provides an overview of the distinct nutritional needs and concerns of the physically active female, including energy availability, macronutrient needs, micronutrient needs, hydration, supplements, and other nutritional issues...
October 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/28872385/new-records-in-human-power
#13
Thomas Haugen, Gøran Paulsen, Stephen Seiler, Øyvind Sandbakk
Maximal aerobic and anaerobic power are crucial performance determinants in most sports disciplines. Numerous studies have published power data from elite athletes over the years, particularly in runners, cyclists, rowers and cross-country skiers. In this invited review, we define the current "world records" in human upper limits of aerobic and anaerobic power. Currently, V̇O2max values of ~7.5 and 7.0 L·min(-1) in male cross-country (XC) skiers and rowers, respectively, and/or ~90 ml·kg(-1)·min(-1) in XC skiers, cyclists and runners can be described as upper human limits for aerobic power...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872383/weight-management-practices-of-australian-olympic-combat-sport-athletes
#14
Reid Reale, Gary Slater, Louise M Burke
PURPOSE: Combat sport athletes undertake chronic and rapid weight loss (RWL) practices to qualify for weight divisions lower than their training weight. Variation between sports in the prevalence, methods, and magnitude of weight loss as well as recovery practices may be influenced by factors including competition level and culture. Differences in methodologies of previous research in combat sports make direct comparisons difficult, thus this study aimed to examine weight loss practices among all Olympic combat sports in Australia, using standardised methodology...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28869822/potential-of-ghb-phase-ii-metabolites-to-complement-current-approaches-in-ghb-post-administration-detection
#15
Thomas Piper, Lena-Maria Mehling, Annika Spottke, Anna Heidbreder, Peter Young, Burkhard Madea, Cornelius Hess, Wilhelm Schänzer, Mario Thevis
Recently, phase-II-metabolites of γ-hydroxybutyric acid (GHB), namely GHB-β-O-glucuronide and GHB-4-sulfate, were implemented in the scope of drug testing methods The clearance of GHB from the circulation is extremely fast due to its incorporation into the metabolic pathway of the citrate cycle. The elimination half-life of GHB from blood was reported to be dose dependent between 30 and 50min resulting in narrow detection windows of less than 12h after illicit administration or cases of drug facilitated sexual assault regardless of the biological matrix used...
August 26, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28857391/estimated-peak-functional-capacity-an-accurate-method-for-assessing-change-in-peak-oxygen-consumption-after-cardiac-rehabilitation
#16
S Nichols, D O Gleadall-Siddall, R Antony, A L Clark, J G F Cleland, S Carroll, L Ingle
OBJECTIVE: Cardiopulmonary exercise testing (CPET) is the 'gold standard' method of determining VO2peak . When CPET is unavailable, VO2peak may be estimated from treadmill or cycle ergometer workloads and expressed as estimated metabolic equivalents (METs). Cardiac rehabilitation (CR) programmes use estimated VO2peak (METs) to report changes in cardiorespiratory fitness (CRF). However, the accuracy of determining changes in VO2peak based on estimated functional capacity is not known. METHODS: A total of 27 patients with coronary heart disease (88·9% male; age 59·5 ± 10·0 years, body mass index 29·6 ± 3·8 kg m(-2) ) performed maximal CPET before and after an exercise-based CR intervention...
August 30, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28847143/description-of-three-female-24-h-ultra-endurance-race-winners-in-various-weather-conditions-and-disciplines
#17
Daniela Chlíbková, Thomas Rosemann, Beat Knechtle, Pantelis T. Nikolaidis, Alena Žákovská, Karl Sudi
A The incidence of exercise-associated hyponatremia (EAH) is higher in women than in men. We present three cases of a very mild post-race EAH in female winners of three 24-h ultra races in various weather conditions and disciplines with post-race plasma sodium [Na⁺] levels of 134 mM (Case 1), 133 mM (Case 2) and 134 mM (Case 3). Moreover, Case 1 and Case 2 showed elevated creatine kinase concentrations of >10,000 U/l with an absence of renal function abnormality. The common characteristics were female sex, veteran recreational category, long race experience in the particular sports discipline, excellent race performance, similar total weekly training hours and the presence of luteal phase of the menstrual cycle during the race...
August 31, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28844726/cycling-and-spinal-trauma-a-worrying-trend-in-referrals-to-a-national-spine-centre
#18
M P Broe, J C Kelly, P J Groarke, K Synnott, S Morris
INTRODUCTION: Cycling has seen a large increase in popularity worldwide over the last number of years. This has been linked to an increase in the number of road traffic accidents involving cyclists. Participation in cycling as part of competitive sport and endurance events has seen particular growth. AIM: To examine patients referred with spinal trauma related to cycling and to assess whether the growing popularity of cycling and particularly competitive cycling is linked to an increase in spinal trauma...
August 22, 2017: Surgeon: Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland
https://www.readbyqxmd.com/read/28829390/perceived-injury-risk-among-junior-cricketers-a-cross-sectional-survey
#19
Prasanna J Gamage, Lauren V Fortington, Caroline F Finch
Understanding how junior athletes perceive injury risks when participating in sport and the environment they play in is an important component of injury prevention. This study investigates how Sri Lankan junior cricketers (n = 365, aged 11-14 years, boys) perceive injury risks associated with playing cricket. The study used a Sri Lankan modification of an Australian junior cricket injury risk perception survey that considered playing cricket versus other sports, different cricket playing positions and roles, and different ground conditions...
August 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28811748/salivary-diagnostic-markers-in-males-and-females-during-rest-and-exercise
#20
Kay Rutherfurd-Markwick, Carlene Starck, Deborah K Dulson, Ajmol Ali
BACKGROUND: Saliva is a useful diagnostic tool for analysis in sports, exercise and nutrition research, as collection is easy and non-invasive and it contains a large number of analytes affected by a range of physiological and pathological stressors and conditions. This study examined key salivary electrolytes and stress and immune markers in males and females at rest and during exercise. METHODS: Unstimulated whole saliva from 20 healthy, recreationally active participants (8 males and 12 females) was analysed for flow rate, osmolality, sodium (Na(+)), potassium (K(+)), chloride (Cl(-)), secretory immunoglobulin A (SIgA), α-amylase activity and cortisol during both rest and moderate intensity (70% peak power) cycling exercise in a randomised crossover design...
2017: Journal of the International Society of Sports Nutrition
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