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https://www.readbyqxmd.com/read/27631016/an-epidemiological-profile-of-crossfit-athletes-in-brazil
#1
Jan W C Sprey, Thiago Ferreira, Marcos V de Lima, Aires Duarte, Pedro B Jorge, Claudio Santili
BACKGROUND: CrossFit is a conditioning and training program that has been gaining recognition and interest among the physically active population. Approximately 440 certified and registered CrossFit fitness centers and gyms exist in Brazil, with approximately 40,000 athletes. To date, there have been no epidemiological studies about the CrossFit athlete in Brazil. PURPOSE: To evaluate the profile, sports history, training routine, and presence of injuries among athletes of CrossFit...
August 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27465626/to-examine-the-relationship-between-the-functional-movement-screen-and-the-landing-error-scoring-system-in-an-active-collegiate-population
#2
E Everard, Aj Harrison, M Lyons
In recent years there has been an increasing focus on movement screening as the principal aspect of pre-participation testing. Two of the most common movement screening tools are the Functional Movement Screen (FMS) and the Landing Error Scoring System (LESS). Several studies have examined the reliability and validity of these tools but so far there have been no studies comparing the results of these two screening tools against each other. Therefore, the purpose of this study was to determine the relationship between Functional Movement Screen (FMS) scores and Landing Error Scoring System (LESS) scores...
July 25, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27408480/examination-of-a-lumbar-spine-biomechanical-model-for-assessing-axial-compression-shear-and-bending-moment-using-selected-olympic-lifts
#3
Moataz Eltoukhy, Francesco Travascio, Shihab Asfour, Shady Elmasry, Hector Heredia-Vargas, Joseph Signorile
BACKGROUND/AIMS: Loading during concurrent bending and compression associated with deadlift, hang clean and hang snatch lifts carries the potential for injury to the intervertebral discs, muscles and ligaments. This study examined the capacity of a newly developed spinal model to compute shear and compressive forces, and bending moments in lumbar spine for each lift. METHODS: Five male subjects participated in the study. The spine was modeled as a chain of rigid bodies (vertebrae) connected via the intervertebral discs...
September 2016: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27191698/comparison-of-olympic-and-hexagonal-barbells-with-mid-thigh-pull-deadlift-and-countermovement-jump
#4
Kylie K Malyszek, RoQue A Harmon, Dustin D Dunnick, Pablo B Costa, Jared W Coburn, Lee E Brown
Those training for strength and power commonly use different bars and different lifts. The hexagonal barbell (HBar) and Olympic barbell (OBar) are frequently used training implements, and the mid-thigh pull and deadlift are two popular exercises. Therefore, the purpose of this study was to compare force between an HBar and OBar for a mid-thigh pull (MTP), deadlift (DL) and countermovement jump (CMJ). Twenty resistance trained men (age = 24.05 ± 2.09 yrs, ht = 178.07 ± 7.05 cm, mass = 91.42 ± 14.44 kg) volunteered to participate and performed MTP and DL utilizing both bars, and a CMJ...
May 14, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26794628/advanced-treatment-monitoring-for-olympic-level-athletes-using-unsupervised-modeling-techniques
#5
Jacob A Siedlik, Charles Bergeron, Michael Cooper, Russell Emmons, William Moreau, Dustin Nabhan, Philip Gallagher, John P Vardiman
CONTEXT: Analysis of injury and illness data collected at large international competitions provides the US Olympic Committee and the national governing bodies for each sport with information to best prepare for future competitions. Research in which authors have evaluated medical contacts to provide the expected level of medical care and sports medicine services at international competitions is limited. OBJECTIVE: To analyze the medical-contact data for athletes, staff, and coaches who participated in the 2011 Pan American Games in Guadalajara, Mexico, using unsupervised modeling techniques to identify underlying treatment patterns...
January 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/25932979/location-of-instability-during-a-bench-press-alters-movement-patterns-and-electromyographical-activity
#6
Brian C Nairn, Chad A Sutherland, Janessa D M Drake
Instability training devices with the bench press exercise are becoming increasingly popular. Typically, the instability device is placed at the trunk/upper body (e.g., lying on a Swiss ball); however, a recent product called the Attitube has been developed, which places the location of instability at the hands by users lifting a water-filled tube. Therefore, the purpose of this study was to analyze the effects of different instability devices (location of instability) on kinematic and electromyographical patterns during the bench press exercise...
November 2015: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/24727575/changes-in-the-spinopelvic-parameters-of-elite-weight-lifters
#7
Jae Hyuk Yang, Rathinavelu Barani, Amit Wasudeo Bhandarkar, Seung Woo Suh, Jae Young Hong, Hitesh N Modi, Jae Hyuk Yang
OBJECTIVE: To describe the changes in the spinopelvic parameters in weight lifters and evaluate the factors leading to spinal anatomical changes (eg, spondylolysis and listhesis). DESIGN: Case-control study. SETTING: Tertiary, institutional. PARTICIPANTS: The study group participants were practicing weight lifters in the athletes' village of the 2012 London Olympics. A total of 21 elite weight lifters were enrolled. Their data were compared with those of 45 healthy volunteers in the control group...
July 2014: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/24714539/how-prepared-are-college-freshmen-athletes-for-the-rigors-of-college-strength-and-conditioning-a-survey-of-college-strength-and-conditioning-coaches
#8
Susan M Wade, Zachary C Pope, Shawn R Simonson
Training programs for high school athletes have changed over the last 20 years. High school physical education classes have transformed into sport-specific conditioning classes with intensities matching college or professional athlete programming. In addition, involvement in private, sport-specific, training increased; but despite these advanced training methods, are high school athletes prepared for collegiate sport competition? An anonymous survey was sent to 195 Division I strength and conditioning coaches (SCC) to discern incoming college freshman athletes' physical and psychological preparedness for the rigors of collegiate training and sport competition...
October 2014: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/24388531/flight-style-optimization-in-ski-jumping-on-normal-large-and-ski-flying-hills
#9
Alexander Jung, Manfred Staat, Wolfram Müller
In V-style ski jumping, aerodynamic forces are predominant performance factors and athletes have to solve difficult optimization problems in parts of a second in order to obtain their jump length maximum and to keep the flight stable. Here, a comprehensive set of wind tunnel data was used for optimization studies based on Pontryagin's minimum principle with both the angle of attack α and the body-ski angle β as controls. Various combinations of the constraints αmax and βmin(t) were analyzed in order to compare different optimization strategies...
February 7, 2014: Journal of Biomechanics
https://www.readbyqxmd.com/read/24276294/the-nature-and-prevalence-of-injury-during-crossfit-training
#10
Paul Taro Hak, Emil Hodzovic, Ben Hickey
CrossFit is a constantly varied, high intensity, functional movement strength and conditioning program which has seen a huge growth in popularity around the world since its inception twelve years ago. There has been much criticism as to the potential injuries associated with CrossFit training including rhabdomyolysis and musculoskeletal injuries. However to date no evidence exists in the literature to the injures and rates sustained. The purpose of this study was to determine the injury rates and profiles of CrossFit athletes sustained during routine CrossFit training...
November 22, 2013: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/24175134/a-phased-rehabilitation-protocol-for-athletes-with-lumbar-intervertebral-disc-herniation
#11
Leonard H Vangelder, Barbara J Hoogenboom, Daniel W Vaughn
UNLABELLED: Conservative non-surgical management of a herniated lumbar intervertebral disc (HLD) in athletes is a complex task due to the dramatic forces imparted on the spine during sport participation. The demands placed upon the athlete during rehabilitation and return to sport are unique not only from a sport specific perspective, but also regarding return to the sport strength and conditioning programs utilized for sport preparation. Many prescriptions fail to address postural and motor control faults specific to athletic development, which may prevent full return to sport after suffering a HLD or predispose the athlete to future exacerbations of a HLD...
August 2013: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/24150557/hydrodynamic-analysis-of-different-thumb-positions-in-swimming
#12
Daniel A Marinho, Abel I Rouboa, Francisco B Alves, João P Vilas-Boas, Leandro Machado, Victor M Reis, António J Silva
The aim of the present study was to analyze the hydrodynamic characteristics of a true model of a swimmer hand with the thumb in different positions using numerical simulation techniques. A three-dimensional domain was created to simulate the fluid flow around three models of a swimmer hand, with the thumb in different positions: thumb fully abducted, partially abducted, and adducted. These three hand models were obtained through computerized tomography scans of an Olympic swimmer hand. Steady-state computational fluid dynamics analyses were performed using the Fluent(®) code...
2009: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/24149688/women-and-men-in-sport-performance-the-gender-gap-has-not-evolved-since-1983
#13
Valérie Thibault, Marion Guillaume, Geoffroy Berthelot, Nour El Helou, Karine Schaal, Laurent Quinquis, Hala Nassif, Muriel Tafflet, Sylvie Escolano, Olivier Hermine, Jean-François Toussaint
Sex is a major factor influencing best performances and world records. Here the evolution of the difference between men and women's best performances is characterized through the analysis of 82 quantifiable events since the beginning of the Olympic era. For each event in swimming, athletics, track cycling, weightlifting and speed skating the gender gap is fitted to compare male and female records. It is also studied through the best performance of the top 10 performers in each gender for swimming and athletics...
2010: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/24033718/increased-mortality-rate-and-suicide-in-swedish-former-elite-male-athletes-in-power-sports
#14
A-S Lindqvist, T Moberg, C Ehrnborg, B O Eriksson, C Fahlke, T Rosén
Physical training has been shown to reduce mortality in normal subjects, and athletes have a healthier lifestyle after their active career as compared with normal subjects. Since the 1950s, the use of anabolic androgenic steroids (AAS) has been frequent, especially in power sports. The aim of the present study was to investigate mortality, including causes of death, in former Swedish male elite athletes, active 1960-1979, in wrestling, powerlifting, Olympic lifting, and the throwing events in track and field when the suspicion of former AAS use was high...
December 2014: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/23883174/elbow-injuries-at-the-london-2012-summer-olympic-games-demographics-and-pictorial-imaging-review
#15
Sarath Bethapudi, Philip Robinson, Lars Engebretsen, Richard Budgett, Ivor S Vanhegan, Philip O'Connor
OBJECTIVE: Elbow injuries in Olympic sports and their imaging findings have not been described previously. The main objective of this article is to analyze the demographic data on imaging of elbow injuries at the London 2012 Summer Olympic Games and to review the spectrum of imaging findings. CONCLUSION: Elbow injuries were seen in a wide variety of sports. Judo and weight-lifting contributed nearly half of all injuries, with only a surprisingly small number of injuries seen in throwing athletes...
September 2013: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/23613517/a-retrospective-30-year-follow-up-study-of-former-swedish-elite-male-athletes-in-power-sports-with-a-past-anabolic-androgenic-steroids-use-a-focus-on-mental-health
#16
A S Lindqvist, T Moberg, B O Eriksson, C Ehrnborg, T Rosén, C Fahlke
BACKGROUND: The knowledge concerning the long-term effect of former anabolic androgenic steroids (AAS)-use on mental health is sparse. AIM: This study aims to investigate whether previous AAS-use affects mental health, present sociodemographic data, sport activity and substance abuse in a retrospective 30-year follow-up study of former elite athletes. METHODS: Swedish male-elite power sport athletes (n=683) on the top 10 national ranking lists during any of the years 1960-1979 in wrestling, Olympic lifting, powerlifting and the throwing events in track and field answered a questionnaire...
October 2013: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/23439334/crossfit-based-high-intensity-power-training-improves-maximal-aerobic-fitness-and-body-composition
#17
Michael M Smith, Allan J Sommer, Brooke E Starkoff, Steven T Devor
The purpose of this study was to examine the effects of a crossfit-based high-intensity power training (HIPT) program on aerobic fitness and body composition. Healthy subjects of both genders (23 men, 20 women) spanning all levels of aerobic fitness and body composition completed 10 weeks of HIPT consisting of lifts such as the squat, deadlift, clean, snatch, and overhead press performed as quickly as possible. Additionally, this crossfit-based HIPT program included skill work for the improvement of traditional Olympic lifts and selected gymnastic exercises...
November 2013: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/23238092/physiological-profile-of-elite-chinese-female-wrestlers
#18
He Zi-Hong, Feng Lian-Shi, Zhang Hao-Jie, Xu Kui-Yuan, Chi Feng-Tang, Tao Da-Lang, Liu Ming-Yi, Alejandro Lucia, Steven J Fleck
The purpose of this investigation was to describe the physiological profile of elite, senior Chinese female wrestlers. Twenty-five elite wrestlers, nationally ranked in the top 3 of their weight class, participated in this study. The subjects included Olympic and world champion medalists. The physiological profile included testing of running maximal oxygen consumption (VO2max), 3,200-m run time, 400-m run time, 30-second Wingate anaerobic power and capacity, shoulder, elbow, knee, and trunk isokinetic torque, and 1 repetition maximums (1RMs) in specified exercises...
September 2013: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/22648139/lactate-response-to-different-volume-patterns-of-power-clean
#19
Anand S Date, Shawn R Simonson, Lynda B Ransdell, Yong Gao
The ability to metabolize or tolerate lactate and produce power simultaneously can be an important determinant of performance. Current training practices for improving lactate use include high-intensity aerobic activities or a combination of aerobic and resistance training. Excessive aerobic training may have undesired physiological adaptations (e.g., muscle loss, change in fiber types). The role of explosive power training in lactate production and use needs further clarification. We hypothesized that high-volume explosive power movements such as Olympic lifts can increase lactate production and overload lactate clearance...
March 2013: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/22450233/kinematic-analysis-of-the-snatch-lift-with-elite-female-weightlifters-during-the-2010-world-weightlifting-championship
#20
Hasan Akkuş
The objectives of this study were to determine the mechanical work, the power output, and the angular kinematics of the lower limb and the linear kinematics of the barbell during the first and second pulls in the snatch lift event of the 2010 Women's World Weightlifting Championship, an Olympic qualifying competition, and to compare the snatch performances of the women weightlifters to those reported in the literature. The heaviest successful snatch lifts of 7 female weightlifters who won gold medals were analyzed...
April 2012: Journal of Strength and Conditioning Research
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