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https://www.readbyqxmd.com/read/28728062/investigation-of-factors-affecting-the-injury-severity-of-single-vehicle-rollover-crashes-a-random-effects-generalized-ordered-probit-model
#1
Alireza Jafari Anarkooli, Mehdi Hosseinpour, Adele Kardar
Rollover crashes are responsible for a notable number of serious injuries and fatalities; hence, they are of great concern to transportation officials and safety researchers. However, only few published studies have analyzed the factors associated with severity outcomes of rollover crashes. This research has two objectives. The first objective is to investigate the effects of various factors, of which some have been rarely reported in the existing studies, on the injury severities of single-vehicle (SV) rollover crashes based on six-year crash data collected on the Malaysian federal roads...
July 17, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28727640/no-seasonal-changes-in-cognitive-functioning-among-high-school-football-athletes-implementation-of-a-novel-electrophysiological-measure-and-standard-clinical-measures
#2
Steven P Broglio, Richelle Williams, Ashley Rettmann, Brandon Moore, James T Eckner, Sean Meehan
OBJECTIVE: To evaluate neuroelectric and cognitive function relative to a season of football participation. Cognitive and neuroelectric function declines are hypothesized to be present in football athletes. DESIGN: Observational. SETTING: Athletic fields and research laboratory. PATIENTS (OR PARTICIPANTS): Seventy-seven high school athletes (15.9 + 0.9 years, 178.6 + 7.2 cm, 74.4 + 14.7 kg, and 0.8 + 0.8 self-reported concussions) participating in football (n = 46) and noncontact sports (n = 31)...
July 14, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28723814/validation-of-the-3-min-all-out-exercise-test-for-shuttle-running-prescription
#3
Anssi Saari, Nathan D Dicks, Mark E Hartman, Robert W Pettitt
A 3-min all-out exercise test (3MT) for running has been developed to determine critical speed (CS) and finite capacity for running speeds >CS (D') which allow for the prediction of time limits (TLIMs) associated with running different distances. Most team sports require shuttle running; however, the 3MT was validated for uninterrupted, track running and not shuttle running. The purpose of this study was to examine the efficacy of shuttle running 3MT to determine critical speed (CS) and D'. A total of 12 subjects were tested using a baseline 3MT along with three separate distance time-trials of all-out shuttle running to determine true CS and D'...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28714746/age-related-changes-in-endurance-performance-vary-between-modes-of-locomotion-in-men-an-analysis-of-master-world-records
#4
Romuald Lepers, Paul J Stapley, Thomas Cattagni
BACKGROUND: Age-related declines in sport performance are characteristic of all endurance and sprinting disciplines. However, it is not known if the mode of locomotion (i.e. swimming, cycling or running) influences the age-related decline in sport performance in sprinting and endurance events. METHODS: To examine the age-related decline in three different modes of locomotion (i.e. swimming, cycling and running) for endurance and sprint events, the world best performances achieved for males in the age-groups 18-39 years, 40-44 years, 45-49 years, 50-54 years, 55-59 years, 60-64 years, 65-69 years, 70-74 years, 75-79 years and 80-84 years, were compared in swimming (1500-m and 50-m), cycling (1-h and 200-m) and running (10-km and 100-m)...
July 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28713281/effectiveness-of-traditional-strength-vs-power-training-on-muscle-strength-power-and-speed-with-youth-a-systematic-review-and-meta-analysis
#5
REVIEW
David G Behm, James D Young, Joseph H D Whitten, Jonathan C Reid, Patrick J Quigley, Jonathan Low, Yimeng Li, Camila D Lima, Daniel D Hodgson, Anis Chaouachi, Olaf Prieske, Urs Granacher
Numerous national associations and multiple reviews have documented the safety and efficacy of strength training for children and adolescents. The literature highlights the significant training-induced increases in strength associated with youth strength training. However, the effectiveness of youth strength training programs to improve power measures is not as clear. This discrepancy may be related to training and testing specificity. Most prior youth strength training programs emphasized lower intensity resistance with relatively slow movements...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28708126/the-effect-of-a-12-week-beta-hydroxy-beta-methylbutyrate-hmb-supplementation-on-highly-trained-combat-sports-athletes-a-randomised-double-blind-placebo-controlled-crossover-study
#6
Krzysztof Durkalec-Michalski, Jan Jeszka, Tomasz Podgórski
The aim of this study was to verify the effect of beta-hydroxy-beta-methylbutyrate (HMB) supplementation on physical capacity, body composition and the value of biochemical parameters in highly-trained combat sports athletes. Forty-two males highly-trained in combat sports were subjected to 12 weeks of supplementation with HMB and a placebo in a randomized, placebo controlled, double-blind crossover manner. Over the course of the experiment, aerobic and anaerobic capacity was determined, while analyses were conducted on body composition and levels of creatine kinase, lactate dehydrogenase, testosterone, cortisol and lactate...
July 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28700513/sled-towing-acutely-decreases-acceleration-sprint-time
#7
Megan A Wong, Ian J Dobbs, Casey M Watkins, Saldiam R Barillas, A Lin, David C Archer, Robert G Lockie, Jared W Coburn, Lee E Brown
Sled towing is a common form of overload training in sports to develop muscular strength for sprinting. This type of training leads to acute and chronic outcomes. Acute training potentially leads to postactivation potentiation (PAP), which is when subsequent muscle performance is enhanced following a preload stimulus. The purpose of this study was to determine differences between rest intervals following sled towing on acute sprint speed. Twenty healthy recreationally trained males (age= 22.3 ± 2.4yrs, height= 176...
July 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28690008/laminin-mimetic-peptide-nanofibers-regenerate-acute-muscle-defect
#8
Cagla Eren Cimenci, Gozde Uzunalli, Ozge Uysal, Fatih Yergoz, Ebru Karaca Umay, Mustafa O Guler, Ayse B Tekinay
Skeletal muscle cells are terminally differentiated and require the activation of muscle progenitor (satellite) cells for their regeneration. There is a clinical need for faster and more efficient treatment methods for acute muscle injuries, and the stimulation of satellite cell proliferation is promising in this context. In this study, we designed and synthesized a laminin-mimetic bioactive peptide (LM/E-PA) system that is capable of accelerating satellite cell activation by emulating the structure and function of laminin, a major protein of the basal membrane of the skeletal muscle...
July 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28686213/a-study-of-vicon-system-positioning-performance
#9
Pierre Merriaux, Yohan Dupuis, Rémi Boutteau, Pascal Vasseur, Xavier Savatier
Motion capture setups are used in numerous fields. Studies based on motion capture data can be found in biomechanical, sport or animal science. Clinical science studies include gait analysis as well as balance, posture and motor control. Robotic applications encompass object tracking. Today's life applications includes entertainment or augmented reality. Still, few studies investigate the positioning performance of motion capture setups. In this paper, we study the positioning performance of one player in the optoelectronic motion capture based on markers: Vicon system...
July 7, 2017: Sensors
https://www.readbyqxmd.com/read/28684215/design-of-wearable-and-wireless-multi-parameter-monitoring-system-for-evaluating-cardiopulmonary-function
#10
Shih-Hong Li, Bor-Shing Lin, Chen-An Wang, Cheng-Ta Yang, Bor-Shyh Lin
The 6-minute walking test (6MWT) is the test most commonly used to evaluate cardiopulmonary function in patients with respiratory or heart disease. However, there was previously no integrated monitoring system available to simultaneously record both the real-time cardiopulmonary physiological parameters and the walking information (i.e., walking distance, speed, and acceleration) during the 6MWT. In this study, then, a wearable and wireless multi-parameter monitoring system was proposed to simultaneously monitor oxygen saturation (SpO2), heart rhythm, and the walking information during the 6MWT...
July 3, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28683418/tibial-impact-accelerations-in-gait-of-primary-school-children-the-effect-of-age-and-speed
#11
Oren Tirosh, Guy Orland, Alon Eliakim, Dan Nemet, Nili Steinberg
Tibial stress fractures are associated with increased lower extremity loading at initial foot-ground contact, reflected in high peak positive acceleration (>8g) of the tibia in adults. There is no reported data on peak positive acceleration of the tibia in children during walking and running. The aim of this study was to establish tibial peak positive acceleration responses in children across a range of age and gait speeds. Twenty-four children aged 8.5±1.4years with no known gait pathology comprised two age groups; Young (7-9year, n=12) and Older (10-12 years, n=12)...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28683231/sound-intensity-feedback-during-running-reduces-loading-rates-and-impact-peak
#12
Jeremiah J Tate, Clare E Milner
Study Design Controlled laboratory study, within session design. Background Gait retraining has been proposed as an effective intervention to reduce impact loading in runners at risk of stress fractures. Interventions that can be easily implemented in the clinic are needed. Objective To assess the immediate effects of sound intensity feedback related to impact during running on vertical impact peak (VIP), peak vertical instantaneous loading rate (VILR), and vertical average loading rate (VALR). Methods Fourteen healthy, college-aged runners who ran at least 9...
July 6, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28680454/piperine-enhances-carbohydrate-fat-metabolism-in-skeletal-muscle-during-acute-exercise-in-mice
#13
Jisu Kim, Kang-Pa Lee, Dae-Won Lee, Kiwon Lim
BACKGROUND: Exercise promotes energy metabolism (e.g., metabolism of glucose and lipids) in skeletal muscles; however, reactive oxygen species are also generated during exercise. Various spices have been reported to have beneficial effects in sports medicine. Here, we investigated the effects of piperine, an active compound in black pepper, to determine its effects on metabolism during acute endurance exercise. METHODS: ICR mice (n = 18) were divided into three groups: nonexercise (CON), exercise (EX), and exercise with piperine (5 mg/kg) treatment (EP)...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28676154/new-generalized-equation-for-predicting-maximal-oxygen-uptake-from-the-fitness-registry-and-the-importance-of-exercise-national-database
#14
Peter Kokkinos, Leonard A Kaminsky, Ross Arena, Jiajia Zhang, Jonathan Myers
Impaired cardiorespiratory fitness (CRF) is closely linked to chronic illness and associated with adverse events. The American College of Sports Medicine (ACSM) regression equations (ACSM equations) developed to estimate oxygen uptake have known limitations leading to well-documented overestimation of CRF, especially at higher work rates. Thus, there is a need to explore alternative equations to more accurately predict CRF. We assessed maximal oxygen uptake (VO2 max) obtained directly by open-circuit spirometry in 7,983 apparently healthy subjects who participated in the Fitness Registry and the Importance of Exercise National Database (FRIEND)...
June 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28667194/the-role-of-environmental-factors-for-the-onset-of-restricted-mobility-outside-the-home-among-older-adults-with-osteoarthritis-a-prospective-cohort-study
#15
Merja Rantakokko, Ross Wilkie
OBJECTIVES: The study examines how environmental factors contribute to the onset of restricted mobility outside the home among older adults with osteoarthritis. METHODS: This is a prospective cohort study of adults aged 50 years and older with osteoarthritis (n=1802). Logistic regression tested the association between the onset of restricted mobility outside the home and health, sociodemographic and perceived environmental barriers (hills and steep slopes, inaccessible public buildings, poor pavement condition, lack of access to public parks or sport facilities, heavy traffic or speeding cars and poor weather)...
June 30, 2017: BMJ Open
https://www.readbyqxmd.com/read/28663136/can-salivary-testosterone-and-cortisol-reactivity-to-a-mid-week-stress-test-discriminate-a-match-outcome-during-international-rugby-union-competition
#16
Blair T Crewther, Neil Potts, Liam P Kilduff, Scott Drawer, Christian J Cook
OBJECTIVES: Evidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in international rugby union competition. DESIGN: Single group, quasi-experimental design with repeated measures. METHOD: Thirty-three male rugby players completed a standardised stress test three or four days before seven international matches...
June 2, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28662531/effects-of-in-season-explosive-strength-training-on-maximal-leg-strength-jumping-sprinting-and%C3%A2-intermittent-aerobic-performance-in-male-handball-athletes
#17
Souhail Hermassi, Mohamed Souhaiel Chelly, Georg Fieseler, Thomas Bartels, Stephan Schulze, Karl-Stefan Delank, Roy J Shephard, René Schwesig
Background Team handball is an intense ball sport with specific requirements on technical skills, tactical understanding, and physical performance. The ability of handball players to develop explosive efforts (e. g. sprinting, jumping, changing direction) is crucial to success. Objective The purpose of this pilot study was to examine the effects of an in-season high-intensity strength training program on the physical performance of elite handball players. Materials and methods Twenty-two handball players (a single national-level Tunisian team) were randomly assigned to a control group (CG; n = 10) or a training group (TG; n = 12)...
June 29, 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/28662349/injury-surveillance-of-head-neck-and-facial-injuries-in-collegiate-ice-hockey-players-2009-2010-through-2013-2014-academic-years
#18
Molly MacMhathan Simmons, David I Swedler, Zachary Y Kerr
CONTEXT:   Ice hockey is a high-speed, full-contact sport with a high risk of head/face/neck (HFN) injuries. However, men's and women's ice hockey differ; checking is allowed only among men. OBJECTIVES:   To describe the epidemiology of HFN injuries in collegiate men's and women's ice hockey during the 2009-2010 through 2013-2014 academic years. DESIGN:   Descriptive epidemiology study. SETTING:   Ice hockey data from the National Collegiate Athletic Association (NCAA) Injury Surveillance Program during the 2009-2010 through 2013-2014 academic years...
June 29, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28658073/monitoring-changes-in-power-speed-agility-and-endurance-in-elite-cricketers-during-the-off-season
#19
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/28654438/differences-in-athletic-performance-between-sportsmen-with-symptomatic-femoroacetabular-impingement-and-healthy-controls
#20
Karen Mullins, Michael Hanlon, Patrick Carton
OBJECTIVE: Femoroacetabular impingement (FAI) is a commonly recognized condition in athletes characterized by activity-related hip pain and stiffness, which if left untreated can progress to hip osteoarthritis. The aim of the study was to determine the effect of symptomatic FAI on performance in young athletes based on the hypothesis that athletes with FAI would show deficits in performance compared with healthy controls. DESIGN: The functional performance of a cohort of preoperative, competitive sportsmen with symptomatic FAI (FAI group, n = 54), was compared with that of a group of age, sex and activity-level matched controls (n = 66)...
June 22, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
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