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https://www.readbyqxmd.com/read/29158958/the-functional-movement-screen-fms%C3%A2-in-elite-young-soccer-players-between-14-and-20-years-composite-score-individual-test-scores-and-asymmetries
#1
Vanessa Bernardes Marques, Thales Menezes Medeiros, Felipe de Souza Stigger, Fábio Yuzo Nakamura, Bruno Manfredini Baroni
Background: The Functional Movement Screen (FMS™) is a widely used seven-test battery used by practitioners working in sport medicine. The FMS™ composite score (sum of seven tests) in soccer athletes from different competitive levels has been well explored in literature, but the specific movement deficits presented by young high competitive level players remains unclear. Purpose: The aim of the present study was to provide a detailed description of the performance of elite young soccer players (age 14-20 years) on the FMS™ testing battery...
November 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29158621/loaded-and-unloaded-jump-performance-of-top-level-volleyball-players-from-different-age-categories
#2
Katia Kitamura, Lucas Adriano Pereira, Ronaldo Kobal, Cesar Cavinato Cal Abad, Ronaldo Finotti, Fábio Yuzo Nakamura, Irineu Loturco
The aim of this study was to investigate the differences in loaded and unloaded jump performances between different age categories of top-level volleyball players from the same club. Forty-three volleyball players were divided into four age groups: under-17, under-19, under-21 and professional. Vertical jumping height for squat jump (SJ), countermovement jump (CMJ) and CMJ with arm swing (CMJa) and mean propulsive velocity (MPV) in the loaded jump squat exercise with 40% of the athlete's body mass were compared among the different age categories, considering body mass as a covariate...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29145966/outcome-evaluation-of-staged-treatment-for-bicondylar-tibial-plateau-fractures
#3
Vincenzo Giordano, Ney Pecegueiro do Amaral, Hilton A Koch, Rodrigo Pires E Albuquerque, Felipe Serrão de Souza, José Félix Dos Santos Neto
BACKGROUND: The universal accepted strategy for treating high-energy tibial plateau fractures remains a topic of ongoing debate. The challenge for the practicing orthopaedic trauma surgeon is to provide anatomical articular fracture reduction, with successfully managing the complex soft-tissue injury that is commonly present at patient admission. The primary aim of the actual study was to evaluate the results of a staged protocol for the treatment of high-energy bicondylar tibial plateau fractures...
October 2017: Injury
https://www.readbyqxmd.com/read/29140180/the-role-of-lumbopelvic-hip-complex-stability-in-softball-throwing-mechanics
#4
Gabrielle G Gilmer, Jessica K Washington, Jeffrey Dugas, James Andrews, Gretchen D Oliver
CONTEXT: Studies have found that a 20% reduction in energy generation from the lumbopelvic-hip complex (LPHC) during overhead throws leads to a 34% increase in load on the shoulder. OBJECTIVE: The purpose of this study was to assess the effects of LPHC stability, via the single leg squat (SLS) assessment, on throwing mechanics of softball athletes. DESIGN: Prospective cohort study. SETTING: Laboratory setting. PARTICIPANTS: Fifty softball athletes (164...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29140159/athletes-rated-as-poor-single-leg-squat-performers-display-measureable-differences-in-single-leg-squat-biomechanics-compared-to-good-performers
#5
Lachlan E Garrick, Bryce C Alexander, Anthony G Schache, Marcus G Pandy, Kay M Crossley, Natalie J Collins
CONTEXT: It is important to validate single-leg squat visual rating criteria used in clinical practice and research. Foot orthoses may improve single-leg squat performance in those who demonstrate biomechanics associated with increased risk of lower-limb injury. OBJECTIVE: Validate visual rating criteria proposed by Crossley et al, by determining whether athletes rated as poor single-leg squat performers display different single-leg squat biomechanics than good performers; and evaluate immediate effects of foot orthoses on single-leg squat biomechanics in poor performers...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29140148/the-reliability-of-individualized-load-velocity-profiles
#6
Harry G Banyard, K Nosaka, Alex D Vernon, G Gregory Haff
PURPOSE: This study examined the reliability of peak velocity (PV), mean propulsive velocity (MPV), and mean velocity (MV) in the development of load-velocity profiles (LVP) in the full depth free-weight back squat performed with maximal concentric effort. METHODS: Eighteen resistance-trained men performed a baseline one-repetition maximum (1RM) back squat trial and three subsequent 1RM trials used for reliability analyses, with 48-hours interval between trials...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29133185/squatting-re-education-with-lumbo-pelvic-thigh-muscles-cocontraction-improves-functional-performance-in-patellofemoral-pain-syndrome-a-case-report
#7
Nagarajan Manickaraj
Anterior knee pain with or without joint crepitus during squatting is the common clinical feature in the individuals with patellofemoral pain syndrome (PFPS). Altered lower extremity alignment and lumbo-pelvic-thigh muscles motor control is often associated with PFPS. Although current interventions recommend individual muscle activation and strength training exercises, the reported benefits of cocontraction based exercises in PFPS is limited. It might be due to the long standing hypothesis that the exercise induced cocontraction of thigh muscles may induce a negative effect by increasing the joint contact forces in individuals with knee osteoarthritis...
November 10, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29131573/flexible-and-lightweight-pressure-sensor-based-on-carbon-nanotube-thermoplastic-polyurethane-aligned-conductive-foam-with-superior-compressibility-and-stability
#8
Wenju Huang, Kun Dai, Yue Zhai, Hu Liu, Pengfei Zhan, Jiachen Gao, Guo-Qiang Zheng, Chuntai Liu, Changyu Shen
Flexible and lightweight carbon nanotubes (CNTs)/thermoplastic polyurethane (TPU) conductive foam with a novel aligned porous structure was fabricated. The density of the aligned porous material was as low as 0.123 g•cm-3. Homogeneous dispersion of CNTs was achieved through the skeleton of the foam, and an ultralow percolation threshold of 0.0023 vol.% was obtained. Compared with the disordered foam, mechanical properties of the aligned foam were enhanced and the piezoresistive stability of the flexible foam was improved significantly...
November 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29128876/internal-femoral-component-malrotation-in-tka-significantly-alters-tibiofemoral-kinematics
#9
Thomas J Heyse, Bilal F El-Zayat, Ronny De Corte, Yan Chevalier, Susanne Fuchs-Winkelmann, Luc Labey
PURPOSE: Femoral component malrotation in total knee arthroplasty (TKA) is clinically proven to cause dissatisfaction and impaired function. This study is an attempt to characterize the tibiofemoral kinematics following femoral malrotation in posterior stabilized (PS) TKA. It was hypothesized that internal malrotation would introduce the most pronounced changes. METHODS: Six fresh-frozen cadaver specimens were mounted in a kinematic rig. Three motion patterns were applied with the native knee and following PS TKA (passive motion, open chain extension, and squatting) while infrared cameras recorded the trajectories of markers attached to femur and tibia...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29128875/allowing-one-quadrant-of-patellar-lateral-translation-during-medial-patellofemoral-ligament-reconstruction-successfully-limits-maltracking-without-overconstraining-the-patella
#10
John J Elias, Kerwyn C Jones, Molly K Lalonde, Joseph N Gabra, S Cyrus Rezvanifar, Andrew J Cosgarea
PURPOSE: Graft tensioning during medial patellofemoral ligament (MPFL) reconstruction typically allows for lateral patellar translation within the trochlear groove. Computational simulation was performed to relate the allowed patellar translation to patellofemoral kinematics and contact pressures. METHODS: Multibody dynamic simulation models were developed to represent nine knees with patellar instability. Dual limb squatting was simulated representing the pre-operative condition and simulated MPFL reconstruction...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29122957/diminished-dynamic-cerebral-autoregulatory-capacity-with-forced-oscillations-in-mean-arterial-pressure-with-elevated-cardiorespiratory-fitness
#11
Lawrence Labrecque, Kevan Rahimaly, Sarah Imhoff, Myriam Paquette, Olivier Le Blanc, Simon Malenfant, Samuel J E Lucas, Damian M Bailey, Jonathan D Smirl, Patrice Brassard
The effect that cardiorespiratory fitness has on the dynamic cerebral autoregulatory capacity during changes in mean arterial pressure (MAP) remains equivocal. Using a multiple-metrics approach, challenging MAP across the spectrum of physiological extremes (i.e., spontaneous through forced MAP oscillations), we characterized dynamic cerebral autoregulatory capacity in 19 male endurance athletes and eight controls via three methods: (1) onset of regulation (i.e., time delay before an increase in middle cerebral artery (MCA) conductance [MCA blood velocity (MCAv)/MAP] and rate of regulation, after transient hypotension induced by sit-to-stand, and transfer function analysis (TFA) of MAP and MCAv responses during (2) spontaneous and (3) forced oscillations (5-min of squat-stand maneuvers performed at 0...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29120989/validity-and-reliability-of-a-new-test-of-planned-agility-in-elite-taekwondo-athletes
#12
Helmi Chaabene, Yassine Negra, Laura Capranica, Raja Bouguezzi, Younés Hachana, Mohamed Ali Rouahi, Bessem Mkaouer
This study aimed to examine the validity, reliability, and sensitivity of a new test of planned agility in elite taekwondo athletes and to establish its relationship with sprint-time, jumping ability, and dynamic balance. Twenty-seven (20 males and 7 females) taekwondo athletes participated to this study. They performed taekwondo-specific agility test (TSAT) in two occasions (i.e., test-retest). Additionally, they performed jumping ability (i.e., squat jump, countermovement jump, standing long jump, and three-hop jump), sprint-time (5-m and 20-m dash), and dynamic balance (i...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29114527/effects-of-special-exercise-programs-on-functional-movement-screen-scores-and-injury-prevention-in-preprofessional-young-football-players
#13
Engin Dinc, Bekir Eray Kilinc, Muge Bulat, Yunus Turgay Erten, Bülent Bayraktar
To increase movement capacity and to reduce injury risk in young soccer players by implementing a special functional exercise program based on functional movement screen (FMS) and correctives. 67 young male athletes 14-19 years of age from a Super League Football Club Academy participated in the study. Functional movement patterns were evaluated with FMS assessment protocol. Deep squat, hurdle step, inline lunge, shoulder mobility, active straight leg raise, trunk stability push-up, and rotatory stability were examined in FMS...
October 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29112056/effects-of-a-resistance-training-intervention-on-strength-power-and-performance-in-adolescent-dancers
#14
Rebecca A Dowse, Mike R McGuigan, Craig Harrison
Dowse, RA, McGuigan, MR, and Harrison, C. Effects of a resistance training intervention on strength, power, and performance in adolescent dancers. J Strength Cond Res XX(X): 000-000, 2017-The aim of this study was to determine whether a 9-week resistance training program could have a significant effect on maximum lower-body strength and power, dynamic balance, and dance performance in adolescent dancers. Twelve competitive adolescent female dancers trained in jazz, ballet, and contemporary were recruited from local dance schools and assigned to a resistance training group (dance experience 9...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29112051/a-comparison-of-the-effects-of-short-term-plyometric-and-resistance-training-on-lower-body-muscular-performance
#15
Malcolm T Whitehead, Timothy P Scheett, Michael R McGuigan, N Z Auckland, Angel V Martin
The purpose of this study was to compare effects of short-term plyometric and resistance training on lower body muscular performance. A convenience sample of thirty males aged 21.3 ± 1.8 years, height 177.3 ± 9.4 cm, mass 80.0 ± 2.6 kg, body fat 16.1 ± 1.2 % participated in this investigation. Participants were grouped and participated in progressive plyometric (PLT) or resistance training (SRT) twice per week for eight consecutive weeks or a control (CNT) group that did not participate in any training...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29105568/the-mechanical-response-of-a-polyetheretherketone-femoral-knee-implant-under-a-deep-squatting-loading-condition
#16
Lennert de Ruiter, Dennis Janssen, Adam Briscoe, Nico Verdonschot
The current study was designed to investigate the mechanical response of a polyetheretherketone-on-polyethylene total knee replacement device during a deep squat. Application of this high-demand loading condition can identify weaknesses of the polyetheretherketone relative to cobalt-chromium. This study investigated whether the implant is strong enough for this type of loading, whether cement stresses are considerably changed and whether a polyetheretherketone femoral component is likely to lead to reduced periprosthetic bone loss as compared to a cobalt-chromium component...
November 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29102877/different-fatigue-resistant-leg-muscles-and-emg-response-during-whole-body-vibration
#17
Deniz Simsek
The purpose of this study was to determine the effects of static whole-body vibration (WBV) on the Electromyograhic (EMG) responses of leg muscles, which are fatigue-resistant in different manner. The study population was divided into two groups according to the values obtained by the Fatigue Index [Group I: Less Fatigue Resistant (LFR), n=11; Group II: More Fatigue Resistant (MFR), n=11]. The repeated electromyographic (EMG) activities of four leg muscles were analyzed the following determinants: (1) frequency (30 Hz, 35 Hz and 40 Hz); (2) stance position (static squat position); (3) amplitude (2 mm and 4 mm) and (4) knee flexion angle (120°), (5) vertical vibration platform...
October 19, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29100145/automated-event-detection-algorithm-for-two-squatting-protocols
#18
Wilshaw R Stevens, Alicia Y Kokoszka, Anthony M Anderson, Kirsten Tulchin-Francis
INTRODUCTION: Squatting biomechanics assessed using motion analysis relies on the identification of specific events: start of descent, transition between descent/ascent and end of ascent. Automated identification reduces the time needed to process trials while allowing consistency across studies. The purpose of this study was to develop criteria for the identification of events and apply them to two squatting protocols in pathological patient and typically developing (TD) groups. METHODS: Thirty-four subjects with hip dysplasia and 41 TD subjects were enrolled in this study...
October 26, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29089109/explosive-lower-limb-extension-mechanics-an-on-land-vs-in-water-exploratory-comparison
#19
Brice Guignard, Jessy Lauer, Pierre Samozino, Luis Mourão, João Paulo Vilas-Boas, Annie Hélène Rouard
During a horizontal underwater push-off, performance is strongly limited by the presence of water, inducing resistances due to its dense and viscous nature. At the same time, aquatic environments offer a support to the swimmer with the hydrostatic buoyancy counteracting the effects of gravity. Squat jump is a vertical terrestrial push-off with a maximal lower limb extension limited by the gravity force, which attracts the body to the ground. Following this observation, we characterized the effects of environment (water vs...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29089000/ununited-bone-ossicle-in-a-patient-with-patellar-tendinopathy
#20
Emily B Beyer, Elena J Jelsing, Wendy J Hurd
A 40-year-old man presented to a physician for knee pain when squatting and in resisted knee extension. The initial diagnosis was patellar tendinopathy. Following physical therapy treatment, a sports medicine physician was consulted for a second opinion. Radiography, diagnostic ultrasound, and magnetic resonance imaging were performed, confirming the original diagnosis and revealing Hoffa's fat pad impingement secondary to an ununited ossicle. J Orthop Sports Phys Ther 2017;47(11):885. doi:10.2519/jospt.2017...
November 2017: Journal of Orthopaedic and Sports Physical Therapy
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