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https://www.readbyqxmd.com/read/28930873/preseason-functional-test-scores-are-associated-with-future-sports-injury-in-female-collegiate-athletes
#1
Jason Brumitt, Bryan Heiderscheit, Robert Manske, Paul E Niemuth, Alma Mattocks, Mitchell J Rauh
Recent prospective cohort studies have reported preseason functional performance test (FPT) measures and associations with future risk of injury; however, the findings associated with these studies have been equivocal. The purpose of this study was to determine the ability of a battery of FPTs as a preseason screening tool to identify female Division III (D III) collegiate athletes who may be at risk for a non-contact time-loss injury to the lower quadrant [LQ = low back and lower extremities]. One hundred six female D III athletes were recruited for this study...
September 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28925816/investigating-the-constrained-action-hypothesis-a-movement-coordination-and-coordination-variability-approach
#2
Anthony Vidal, Will Wu, Mimi Nakajima, James Becker
The purpose of this study was to examine the effects of focus of attention cues on movement coordination and coordination variability in the lower extremity. Twenty participants performed the standing long jump under both internal and external focus of attention conditions. A modified vector coding technique was used to evaluate the influence of attentional focus cues on lower extremity coordination patterns and coordination variability during the jumps. Participants jumped significantly further under an external focus of attention condition compared with an internal focus of attention condition (p = ...
September 19, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28920556/the-effects-of-limb-dominance-and-a-short-term-high-intensity-exercise-protocol-on-both-landings-of-the-vertical-drop-jump-implications-for-the-vertical-drop-jump-as-a-screening-tool
#3
Enda F Whyte, Patrick Kennelly, Oliver Milton, Chris Richter, Siobhán O'Connor, Kieran A Moran
The effectiveness of vertical drop jumps (VDJs) to screen for non-contact ACL injuries is unclear. This may be contributed to by discrete point analysis, which does not evaluate patterns of movement. Also, limited research exists on the second landing of VDJs, potential lower limb performance asymmetries and the effect of fatigue. Statistical parametric mapping investigated the main effects of landing, limb dominance and a high intensity, intermittent exercise protocol (HIIP) on VDJ biomechanics. Twenty-two male athletes (21...
September 18, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28916871/strength-and-functional-symmetry-is-associated-with-post-operative-rehabilitation-in-patients-following-anterior-cruciate-ligament-reconstruction
#4
Jay R Ebert, Peter Edwards, Luke Yi, Brendan Joss, Timothy Ackland, Richard Carey-Smith, Jens-Ulrich Buelow, Ben Hewitt
PURPOSE: To investigate strength and functional symmetry during common tests in patients after anterior cruciate ligament reconstruction (ACLR), and its association with post-operative rehabilitation. METHODS: At a median 11.0 months post-surgery (range 10-14), 111 ACLR patients were assessed. A rehabilitation grading tool was employed to evaluate the duration and supervision of rehabilitation, as well as whether structured jumping, landing and agility exercises were undertaken...
September 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28902117/factors-influencing-spike-jump-height-in-female-college-volleyball-players
#5
Yusuke Ikeda, Yusuke Sasaki, Shingo Sorimachi, Rena Hamano
The purpose of this study was to examine factors influencing spike jump (SPJ) performance by female competitive volleyball players through comparisons of the kinematic data of SPJ with those of the standing long jump (SLJ) and vertical jump (VJ). Seventeen female competitive volleyball players were asked to perform SPJ, SLJ, and VJ. Motion data of SPJ including the approach phase were recorded. Regarding SLJ and VJ, jumping motion and ground reaction force were recorded during each performance. The results obtained showed that SPJ height correlated with vertical velocity at take-off, horizontal velocity at third step contact, and the deceleration of horizontal velocity from third step contact to take-off...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902112/the-efficacy-of-repeated-cold-water-immersion-on-recovery-following-a-simulated-rugby-union-protocol
#6
Sean Barber, Pattison John, Freddy Brown, Jessica Hill
Training and athletic competition frequently results in exercise induced muscle damage (EIMD). The purpose of this study was to investigate the efficacy of repeated cold water immersion (CWI) on recovery following a simulated rugby union match. Sixteen male, club level rugby players were matched for body mass and randomly assigned to either a CWI group or control (CON) group. Following the simulated rugby match the CWI group underwent 2 x 5 min immersions at a temperature of 10°C separated by 2.5 min seated at room temperature, whilst the CON group remained seated for 15 min...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28900562/a-biomechanical-comparison-among-three-kinds-of-rebound-type-jumps-in-female-collegiate-athletes
#7
Miki Nariai, Naruto Yoshida, Atsushi Imai, Kazumichi Ae, Ryo Ogaki, Hirokazu Suhara, Hitoshi Shiraki
BACKGROUND: Single-legged drop jumps (SDJ), single-legged repetitive jumps (SRJ), and single-legged side hops (SSH) are often used as plyometric training and functional performance tests. Differences in the kinetics and kinematic characteristics of lower extremity joints during these jumps are unclear. HYPOTHESIS/PURPOSE: The purpose of this study was to investigate the joint motion and mechanical work of the takeoff leg from foot contact to foot-off during SDJ, SRJ, and SSH in the sagittal and frontal planes in female athletes...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28899656/greater-ankle-strength-anaerobic-and-aerobic-capacity-and-agility-predict-ground-combat-military-occupational-school-graduation-in-female-marines
#8
Katelyn Fleishman Allison, Karen A Keenan, Meleesa F Wohleber, Katherine A Perlsweig, Erin R Pletcher, Mita Lovalekar, Kim Beals, Lawrence C Coleman, Bradley C Nindl
Women can serve in all military occupational specialties (MOS); however, musculoskeletal and physiological characteristics that predict successful completion of ground combat MOS schools by female Marines are unknown. OBJECTIVES: To determine which demographic, musculoskeletal, and physiological characteristics predict graduation from infantry and vehicle ground combat MOS schools in female Marines. DESIGN: Prospective cohort study. METHODS: Prior to MOS school, the following were assessed in 62 female Marines (22...
August 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28895621/optimum-drop-jump-height-in-division-iii-athletes-under-75-of-vertical-jump-height
#9
Hsien-Te Peng, Cong Toai Khuat, Thomas W Kernozek, Brian J Wallace, Shin-Liang Lo, Chen-Yi Song
Our purpose was to evaluate the vertical ground reaction force, impulse, moments and powers of hip, knee and ankle joints, contact time, and jump height when performing a drop jump from different drop heights based on the percentage of a performer's maximum vertical jump height (MVJH). Fifteen male Division III athletes participated voluntarily. Eleven synchronized cameras and two force platforms were used to collect data. One-way repeated-measures analysis of variance tests were used to examine the differences between drop heights...
September 11, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28872400/what-is-the-most-effective-training-approach-for-preventing-noncontact-acl-injuries-in-high-school-aged-female-athletes
#10
Erica M Willadsen, Andrea B Zahn, Chris J Durall
CLINICAL SCENARIO: The high prevalence of noncontact anterior cruciate ligament (ACL) injuries in adolescent female athletes is thought to originate from hormonal, neuromuscular, and structural differences between sexes.(1) Although hormonal and structural factors are non-modifiable, neuromuscular control can be altered with training. A variety of training approaches have been adopted in ACL prevention programs including neuromuscular control training, core stability training, balance training, and plyometric exercise...
September 5, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28871900/effects-of-a-modified-ballet-class-on-strength-and-jumping-ability-in-college-ballet-dancers
#11
Aikaterini Tsanaka, Vasiliki Manou, Spiros Kellis
The ability to jump high with precision is an important component of the ballet dancer's technique. The aim of this study was to evaluate the effect of a modified ballet class on strength and jumping ability in high level female dancers. Seventeen female ballet students were divided into two groups, experimental and control, and tested before and after an 8-week, 2 times/week intervention for peak torque of knee extensors and flexors at 60°and 180°, and jumping ability (squat jump, countermovement jump, countermovement with arm swing jump, sauté in first position, and sauté in first position with port de bras)...
September 15, 2017: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/28846654/can-magnesium-enhance-exercise-performance
#12
REVIEW
Yijia Zhang, Pengcheng Xun, Ru Wang, Lijuan Mao, Ka He
Magnesium (Mg) is an essential mineral that plays a critical role in the human body. It takes part in the process of energy metabolism and assists the maintenance of normal muscle function. A number of studies evaluated the association between Mg status/supplementation and exercise performance and found that the need for Mg increased as individuals' physical activity level went up. Animal studies indicated that Mg might improve exercise performance via enhancing glucose availability in the brain, muscle and blood; and reducing/delaying lactate accumulation in the muscle...
August 28, 2017: Nutrients
https://www.readbyqxmd.com/read/28846505/development-and-validation-of-a-portable-and-inexpensive-tool-to-measure-the-drop-vertical-jump-using-the-microsoft-kinect-v2
#13
Aaron D Gray, Brad W Willis, Marjorie Skubic, Zhiyu Huo, Swithin Razu, Seth L Sherman, Trent M Guess, Amirhossein Jahandar, Trevor R Gulbrandsen, Scott Miller, Nathan J Siesener
BACKGROUND: Noncontact anterior cruciate ligament (ACL) injury in adolescent female athletes is an increasing problem. The knee-ankle separation ratio (KASR), calculated at initial contact (IC) and peak flexion (PF) during the drop vertical jump (DVJ), is a measure of dynamic knee valgus. The Microsoft Kinect V2 has shown promise as a reliable and valid marker-less motion capture device. HYPOTHESIS: The Kinect V2 will demonstrate good to excellent correlation between KASR results at IC and PF during the DVJ, as compared with a "gold standard" Vicon motion analysis system...
August 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28840276/two-dimensional-motion-analysis-of-dynamic-knee-valgus-identifies-female-high-school-athletes-at-risk-of-non-contact-anterior-cruciate-ligament-injury
#14
Hitoaki Numata, Junsuke Nakase, Katsuhiko Kitaoka, Yosuke Shima, Takeshi Oshima, Yasushi Takata, Kengo Shimozaki, Hiroyuki Tsuchiya
PURPOSE: Female athletes are at greater risk of non-contact ACL injury. Three-dimensional kinematic analyses have shown that at-risk female athletes have a greater knee valgus angle during drop jumping. The purpose of this study was to evaluate the relationship between knee valgus angle and non-contact ACL injury in young female athletes using coronal-plane two-dimensional (2D) kinematic analyses of single-leg landing. METHODS: Two hundred ninety-one female high school athletes newly enrolled in basketball and handball clubs were assessed...
August 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28825878/injuries-in-australian-rules-football-an-overview-of-injury-rates-patterns-and-mechanisms-across-all-levels-of-play
#15
Richard Saw, Caroline F Finch, David Samra, Peter Baquie, Tanusha Cardoso, Danielle Hope, John W Orchard
CONTEXT: The nature of Australian rules football (Australian football) predisposes both unique and common injuries compared with those sustained in other football codes. The game involves a combination of tackling, kicking, high-speed running (more than other football codes), and jumping. Two decades of injury surveillance has identified common injuries at the professional level (Australian Football League [AFL]). OBJECTIVE: To provide an overview of injuries in Australian rules football, including injury rates, patterns, and mechanisms across all levels of play...
August 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28818697/kinematic-differences-during-a-jump-cut-maneuver-between-individuals-with-and-without-a-concussion-history
#16
Andrew P Lapointe, Luis A Nolasco, Aniela Sosnowski, Eva Andrews, Douglas N Martini, Riann M Palmieri-Smith, Deanna H Gates, Steven P Broglio
Recent evidence suggests that athletes are at a higher risk of lower-body injuries in the months and years following a concussion. However, little is known about how people modify their movements post-concussion. This study examined kinematics during a jump cut motion in young adults with a concussion history (n=9; 4 males, 5 females; 3.1years' post-injury) and 10 controls (6 males, 4 females). Peak center of mass and peak knee angles during the landing phase of a jump-cut maneuver were evaluated. Participants with a concussion history demonstrated decreased knee varus (left: Mconc=-0...
August 14, 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28802221/in-vivo-mechanical-behaviour-of-the-anterior-cruciate-ligament-a-study-of-six-daily-and-high-impact-activities
#17
Elisa Roldán, Neil D Reeves, Glen Cooper, Kirstie Andrews
The anterior cruciate ligament (ACL) plays a key role in the stability of the knee joint restricting the rotation and anterior tibial translation. However, there is a lack of knowledge of the in vivo ACL mechanical behaviour during high impact manoeuvres. The motion of 12 young participants with healthy knees was captured while they performed the following activities: walking, running, cross-over cutting, sidestep cutting, jumping and jumping with one leg. The in vivo ACL length and strain were estimated using experimental kinematic data and three degree of freedom (DOF) knee model...
August 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28799161/performance-factors-in-a-mountain-ultramarathon
#18
Pascal Balducci, Michel Clémençon, Robin Trama, Yoann Blache, Christophe Hautier
This study aimed to determine mountain ultra-marathon (MUM) performance factors in a large group of endurance mountain runners. Maximal aerobic speed (MAS) was assessed one week prior to the MUM. The level and graded (10%) energy cost of running, stiffness, knee extensors force (KEf), and jump height on a counter movement jump (CMJ) were measured in 24 male ultra runners before (pre) and immediately after (post) the Interlacs Trail (75 km and 3 930/3 700 m d+/d-). Performance time was correlated with MAS (r=- 0...
August 10, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28799030/transfer-of-improved-movement-technique-after-receiving-verbal-external-focus-and-video-instruction
#19
Anne Benjaminse, Wouter Welling, Bert Otten, Alli Gokeler
PURPOSE: It is unknown how movement patterns that are learned carry over to the field. The objective was to determine whether training during a jump-landing task would transfer to lower extremity kinematics and kinetics during sidestep cutting. METHODS: Forty healthy athletes were assigned to the verbal internal focus (IF, n = 10), verbal external focus (EF, n = 10), video (VI, n = 10) or control (CTRL, n = 10) group. A jump-landing task was performed as baseline followed by training blocks (TR1 and TR2) and a post-test...
August 10, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28777695/relationship-of-performance-on-the-sensory-organization-test-to-landing-characteristics
#20
Caleb D Johnson, Valerie J Williams, Nicholas R Heebner, Meleesa F Wohleber, Andrew J Simonson, Deirdre M Rafferty, Andrew Reinert, Timothy C Sell
Jump landing tasks have been used to assess landing characteristics and require significant sensorimotor feedback to maintain functional joint stability (FJS) throughout the task. Postural stability (PS) also requires significant sensorimotor feedback and control and would seemingly involve similar sensory feedback pathways. However, previous literature clarifying the relationship between these two processes, maintaining FJS and PS, is limited. 80 Special Tactics Operators. PS was assessed using the Sensory Organization Test (SOT)...
August 4, 2017: Journal of Sports Sciences
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