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https://www.readbyqxmd.com/read/28643129/magnetohydrodynamic-voltage-recorder-for-comparing-peripheral-blood-flow
#1
Kevin J Wu, T Stan Gregory, Michael C Lastinger, Jonathan R Murrow, Zion Tsz Ho Tse
Blood flow is a clinical metric for monitoring of cardiovascular diseases but current measurements methods are costly or uncomfortable for patients. It was shown that the interaction of the magnetic field (B 0) during MRI and blood flow in the body, through the magnetohydrodynamic (MHD) effect, produce voltages (V MHD) observable through intra-MRI electrocardiography (ECG), which are correlated with regional blood flow. This study shows the reproducibility of V MHD outside the MRI and its application in a portable flow monitoring device...
June 22, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28640774/the-difference-between-countermovement-and-squat-jump-performances-a-review-of-underlying-mechanisms-with-practical-applications
#2
Bas Van Hooren, Julia Zolotarjova
Van Hooren, B and Zolotarjova, J. The difference between countermovement and squat jump performances: a review of underlying mechanisms with practical applications. J Strength Cond Res 31(7): 2011-2020, 2017-Two movements that are widely used to monitor athletic performance are the countermovement jump (CMJ) and squat jump (SJ). Countermovement jump performance is almost always better than SJ performance, and the difference in performance is thought to reflect an effective utilization of the stretch-shortening cycle...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640773/salivary-mitochondrial-dna-copy-number-is-associated-with-exercise-ventilatory-efficiency
#3
Yang Chen, Helene Z Hill, Gudrun Lange, Michael J Falvo
Chen, Y, Hill, HZ, Lange, G, and Falvo, MJ. Salivary mitochondrial DNA copy number is associated with exercise ventilatory efficiency. J Strength Cond Res 31(7): 2000-2004, 2017-Mitochondrial DNA copy number (mtDNAcn) is an index of mitochondrial content and is responsive to changes in exercise training volume. Therefore, assessment of mtDNAcn may help to optimize exercise prescription and aid in athlete monitoring. Although previous work has assessed mtDNAcn derived from skeletal muscle and blood using invasive approaches, no study has examined salivary mtDNAcn and its relationship with sport performance...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28639438/body-composition-analysis-to-study-long-term-training-effects-in-elite-male-water-polo-athletes
#4
Giovanni Melchiorri, Valerio Viero, Roberto Sorge, Tamara Triossi, Alessandro Campagna, Stella L Volpe, Dalgisio Lecis, Virginia Tancredi, Angela Andreoli
BACKGROUND: Elite water polo athletes undergo heavy training programs throughout the year, but especially to prepare major competitions, such as the Olympics. Optimal athletic performance is a result of many factors, including proper management of the intensity and volume of training, nutrition and recovery between training sessions. When training is excessive in relation to recovery may occur non functional overreaching (NFO). NFO can degenerate into overtraining syndrome (OTS) resulting in a decrease in athletic performance, with likely changes in body weight and body composition...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#5
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28628053/heart-rate-and-blood-pressure-responses-to-gear-weight-under-a-controlled-workload
#6
Cassandra C Derella, Kristin R Aichele, Joyann E Oakman, Christina M Cromwell, Jessica A Hill, Lauren N Chavis, Avery N Perez, Allyson K Getty, Tia R Wisdo, Deborah L Feairheller
OBJECTIVE: To compare the effects of personal protective equipment (PPE) weight on blood pressure (BP) and heart rate (HR), between volunteer firefighters (FF) and athletes. METHODS: Athletes and FF were matched by body size and came to the lab twice for two treadmill tests. The "Regular" test was completed in normal fitness clothing, and PPE test was completed in full structural PPE with monitoring of HR assessment every minute and BP each stage. RESULTS: In the FF cohort, all submaximal HR and BP levels were different...
April 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28622665/non-invasive-in-situ-measurement-of-blood-lactate-using-microwave-sensors
#7
Alex Mason, Olga Korostynska, Julien Louis, Luis Eduardo Cordova-Lopez, Badr Abdullah, Jacob Greene, Rob Connell, John Hopkins
GOAL: This paper reports the use of a novel electromagnetic sensor technique for real-time non-invasive monitoring of blood lactate in human subjects. METHODS: The technique was demonstrated on 34 participants who undertook a cycling regime, with rest period before and after, to produce a rising and falling lactate response curve. Sensors attached to the arm and legs of participants gathered spectral data, blood samples were measured using a Lactate Pro V2, as well as temperature and heart rate data were collected...
June 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28610958/sulfate-nitrate-and-blood-pressure-an-epic-interaction-between-sulfur-and-nitrogen
#8
Gunter G Kuhnle, Robert Luben, Kay-Tee Khaw, Martin Feelisch
Nitrate (NO3(-))-rich foods such as green leafy vegetables are not only part of a healthy diet, but increasingly marketed for primary prevention of cardiovascular disease (CVD) and used as ergogenic aids by competitive athletes. While there is abundant evidence for mild hypotensive effects of nitrate on acute application there is limited data on chronic intake in humans, and results from animal studies suggest no long-term benefit. This is important as nitrate can also promote the formation of nitrosamines...
June 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28605214/influence-of-reactive-strength-index-modified-on-force-and-power-time-curves
#9
John J McMahon, Paul A Jones, Timothy J Suchomel, Jason Lake, Paul Comfort
PURPOSE: The reactive strength index modified (RSImod) has been recently identified and validated as a method of monitoring countermovement jump (CMJ) performance. The kinetic and kinematic mechanisms that optimize a higher RSImod score are, however, currently unknown. The purpose of this study, therefore, was to compare entire CMJ force-, power-, velocity- and displacement-time curves (termed temporal phase analysis) of athletes who achieve high versus low RSImod scores. METHODS: Fifty-three professional male rugby league players performed three maximal effort CMJs on a force platform and variables of interest were calculated via forward dynamics...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28605209/pacing-and-self-regulation-important-skills-for-talent-development-in-endurance-sports
#10
Marije T Elferink-Gemser, Florentina J Hettinga
Pacing has been characterized as a multi-faceted goal-directed process of decision-making in which athletes need to decide how and when to invest their energy during the race, a process essential for optimal performance. Both physiological as well as psychological characteristics associated with adequate pacing and performance are known to develop with age. Consequently, the multi-faceted skill of pacing might be under construction throughout adolescence as well. Therefore, we propose that the complex skill of pacing is a potential important performance characteristic for talented youth athletes, that needs to be developed throughout adolescence...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28602152/physical-activity-and-cognitive-function-of-long-distance-walkers-studying-four-days-marches-participants
#11
Hans Wouters, Teun Aalbers, Martijn Maessen, André Verbeek, Marcel Olde Rikkert, Roy Kessels, Maria Hopman, Thijs Eijsvogels
OBJECTIVE: Studies show physical activity to be beneficial for cognitive function. However, studies usually included individuals who were not particularly inclined to exercise. Following research among master athletes, we examined associations between physical activity and cognitive function in participants of the International Nijmegen Four Days Marches. These individuals are also inclined to exercise. On 4 consecutive days > 40,000 participants walk a daily distance of 30-50 km (120-200 km or 75-125 miles in total)...
June 10, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28597622/the-effect-of-training-load-on-neuromuscular-performance-muscle-soreness-and-wellness-during-an-in-season-non-competitive-week-in-elite-rugby-athletes
#12
Francisco Tavares, Phil Healey, Tiaki B Smith, Matthew Driller
BACKGROUND: In the elite Rugby setting, it is critical to understand the effects of training load on the levels of fatigue, soreness and readiness of the athletes. METHODS: The training load, wellness, neuromuscular markers of fatigue and various perceptual measures of soreness of 16 elite Rugby athletes were monitored during a training week. Training load was obtained for field training sessions, extra conditioning and gym-based sessions. Perceptual fatigue was obtained every morning from a 5-item wellness questionnaire and a questionnaire on the muscle soreness of 9 different muscle sites from each side of the body...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597621/hemodynamic-adaptation-to-training-in-visually-impaired-professional-tandem-cyclists
#13
Anna M Kamelska, Krzysztof L Mazurek, Jacek J Nowakowski
BACKGROUND: Cycling is one of the disciplines with the greatest training-induced volumetric changes in cardiovascular systems. The aim of the study was to evaluate the hemodynamic adaptation to 7-month routine training in athletes with and without severe visual impairment. METHODS: The study involved 26 men: visually impaired (VI) (n = 13; 37±12.2 years) and properly sighted (PS) (n = 13; 41±12.8 years) elite tandem-cycling athletes. They underwent hemodynamic variables monitoring at rest and during exercise test by impedance cardiography (ICG), before (in the middle of the transition period) and after 7-month cycling training (at the beginning of the competitive period)...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597617/iron-monitoring-of-male-and-female-rugby-sevens-players-over-an-international-season
#14
Anthea C Clarke, Judith M Anson, Christine E Dziedzic, Warren A McDonald, David B Pyne
BACKGROUND: Given the likely influence that high training loads, contact-induced haemolysis and female-specific requirements have on the incidence of iron deficiency, characterising the direction and magnitude of fluctuations in iron status over an international season is important for managing player health and physical performance in rugby sevens. METHODS: Australian national male (n=27) and female (n=23) rugby sevens players undertook blood tests at pre-season, mid-season, and end-season...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28584707/rituals-decrease-the-neural-response-to-performance-failure
#15
Nicholas M Hobson, Devin Bonk, Michael Inzlicht
Rituals are found in all types of performance domains, from high-stakes athletics and military to the daily morning preparations of the working family. Yet despite their ubiquity and widespread importance for humans, we know very little of ritual's causal basis and how (if at all) they facilitate goal-directed performance. Here, in a fully pre-registered pre/post experimental design, we examine a candidate proximal mechanism, the error-related negativity (ERN), in testing the prediction that ritual modulates neural performance-monitoring...
2017: PeerJ
https://www.readbyqxmd.com/read/28578541/anthropometric-and-physical-qualities-of-elite-male-youth-rugby-league-players
#16
REVIEW
Kevin Till, Sean Scantlebury, Ben Jones
Rugby league is a collision team sport played at junior and senior levels worldwide, whereby players require highly developed anthropometric and physical qualities (i.e. speed, change-of-direction speed, aerobic capacity, muscular strength and power). Within junior levels, professional clubs and national governing bodies implement talent identification and development programmes to support the development of youth (i.e. 13-20 years) rugby league players into professional athletes. This review presents and critically appraises the anthropometric and physical qualities of elite male youth rugby league players aged between 13 and 20 years, by age category, playing standard and playing position...
June 3, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28578329/the-athlete-biological-passport-how-to-personalize-anti-doping-testing-across-an-athlete-s-career
#17
Neil Robinson, Pierre-Edouard Sottas, Yorck Olaf Schumacher
For decades, drug testing has been the main instrument at the disposal of anti-doping authorities. The availability in the 1980s of substances identical to those produced by the human body, including the "big 3" (erythropoietin, testosterone, and growth hormone), necessitated a new paradigm in anti-doping. The athlete biological passport (ABP) is a new paradigm, complementary to traditional drug testing, based on the personalized monitoring of doping biomarkers. Athletes who abuse doping substances do so to trigger physiological changes that provide performance enhancement...
2017: Medicine and Sport Science
https://www.readbyqxmd.com/read/28574751/athletic-trainers-reasons-for-and-mechanics-of-documenting-patient-care-a-report-from-the-athletic-training-practice-based-research-network
#18
Sara L Nottingham, Kenneth C Lam, Tricia M Kasamatsu, Bradly L Eppelheimer, Cailee E Welch Bacon
CONTEXT:   Documenting patient care is an important responsibility of athletic trainers (ATs). However, little is known about ATs' reasons for documenting patient care and mechanics of completing documentation tasks. OBJECTIVE:   To understand ATs' perceptions about reasons for and the mechanics of patient care documentation. DESIGN:   Qualitative study. SETTING:   Individual telephone interviews with Athletic Training Practice-Based Research Network members...
June 2, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28573322/plasmonic-gold-nanoparticles-for-detection-of-fungi-and-human-cutaneous-fungal-infections
#19
Tobiloba Sojinrin, João Conde, Kangze Liu, James Curtin, Hugh J Byrne, Daxiang Cui, Furong Tian
Fungi, which are common in the environment, can cause a multitude of diseases. Warm, humid conditions allow fungi to grow and infect humans via the respiratory, digestive and reproductive tracts, genital area and other bodily interfaces. Fungi can be detected directly by microscopy, using the potassium hydroxide test, which is the gold standard and most popular method for fungal screening. However, this test requires trained personnel operating specialist equipment, including a fluorescent microscope and culture facilities...
June 2, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28571016/next-generation-omics-approaches-in-the-fight-against-blood-doping
#20
Guan Wang, Antonia Karanikolou, Ioanna Verdouka, Theodore Friedmann, Yannis Pitsiladis
Despite being prohibited by the World Anti-Doping Agency (WADA), blood manipulations such as the use of recombinant human erythropoietin and blood transfusions are a well-known method used by athletes to enhance performance. Direct detection of illicit blood manipulation has been partially successful due to the short detection window of the substances/methods, sample collection timing, and the use of sophisticated masking strategies. In response, WADA introduced the athlete biological passport (ABP) in 2009, which is an individualised longitudinal monitoring approach that tests primarily haematologic biomarkers of doping in order to identify atypical variability in response(s) in athletes, highlighting a potential doping violation...
2017: Medicine and Sport Science
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