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Landing biomechanics

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https://www.readbyqxmd.com/read/28929927/ankle-taping-can-reduce-external-ankle-joint-moments-during-drop-landings-on-a-tilted-surface
#1
Nahoko Sato, Hiroyuki Nunome, Luke S Hopper, Yasuo Ikegami
Ankle taping is commonly used to prevent ankle sprains. However, kinematic assessments investigating the biomechanical effects of ankle taping have provided inconclusive results. This study aimed to determine the effect of ankle taping on the external ankle joint moments during a drop landing on a tilted surface at 25°. Twenty-five participants performed landings on a tilted force platform that caused ankle inversion with and without ankle taping. Landing kinematics were captured using a motion capture system...
September 20, 2017: Sports Biomechanics
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
#2
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/28915438/cell-wall-biomechanics-a-tractable-challenge-in-manipulating-plant-cell-walls-fit-for-purpose
#3
REVIEW
Kim L Johnson, Michael J Gidley, Antony Bacic, Monika S Doblin
The complexity and recalcitrance of plant cell walls has contributed to the success of plants colonising land. Conversely, these attributes have also impeded progress in understanding the roles of walls in controlling and directing developmental processes during plant growth and also in unlocking their potential for biotechnological innovation. Recent technological advances have enabled the probing of how primary wall structures and molecular interactions of polysaccharides define their biomechanical (and hence functional) properties...
September 12, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28802431/ankle-restrictive-firefighting-boots-alter-the-lumbar-biomechanics-during-landing-tasks
#4
Vy Vu, Anthony Walker, Nick Ball, Wayne Spratford
Firefighters incur high incidences of lower back and body injuries. Firefighting boots, with specific design requirements, have been shown to reduce ankle range of motion. This reduction has been associated with impaired force dissipation and lower body kinematic alterations. Thus, the aim of this study was to determine the relationship between firefighting boots, lumbar biomechanics and load carriage during landing. Our data indicates that when wearing firefighting boots, lumbar forces increased and kinematics changed in frontal and transverse planes...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28759729/the-effects-of-injury-prevention-programs-on-the-biomechanics-of-landing-tasks-a-systematic-review-with-meta-analysis
#5
Thiago Jambo Alves Lopes, Milena Simic, Gregory D Myer, Kevin R Ford, Timothy E Hewett, Evangelos Pappas
BACKGROUND: Anterior cruciate ligament (ACL) tear is a common injury in sports and often occurs during landing from a jump. PURPOSE: To synthesize the evidence on the effects of injury prevention programs (IPPs) on landing biomechanics as they relate to the ligament, quadriceps, trunk, and leg dominance theories associated with ACL injury risk. STUDY DESIGN: Meta-analysis. METHODS: Six electronic databases were searched for studies that investigated the effect of IPPs on landing task biomechanics...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28730871/effects-of-timing-of-signal-indicating-jump-directions-on-knee-biomechanics-in-jump-landing-jump-tasks
#6
Mitchell L Stephenson, Taylour J Hinshaw, Haley A Wadley, Qin Zhu, Margaret A Wilson, Mark Byra, Boyi Dai
A variety of the available time to react (ATR) has been utilised to study knee biomechanics during reactive jump-landing tasks. The purpose was to quantify knee kinematics and kinetics during a jump-land-jump task of three possible directions as the ATR was reduced. Thirty-four recreational athletes performed 45 trials of a jump-land-jump task, during which the direction of the second jump (lateral, medial or vertical) was indicated before they initiated the first jump, the instant they initiated the first jump, 300 ms before landing, 150 ms before landing or at the instant of landing...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28723822/biomechanical-differences-in-female-basketball-and-soccer-players-during-multi-directional-jump-landings
#7
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Anterior cruciate ligament injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multi-directional jump landings. Lower extremity biomechanics of eighty-nine female athletes who played competitive basketball (n=40) or soccer (n=49) at the middle- or high-school level were analyzed with three-dimensional motion analysis during a drop vertical jump (DVJ), double- (SAG-DL) and single-leg forward jump (SAG-SL), and double- (FRONT-DL) and single-leg (FRONT-SL) lateral jump...
July 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28722467/the-influence-of-lower-extremity-lean-mass-on-landing-biomechanics-during-prolonged-exercise
#8
Melissa M Montgomery, Amanda J Tritsch, John R Cone, Randy J Schmitz, Robert A Henson, Sandra J Shultz
CONTEXT:   The extent to which lower extremity lean mass (LELM) relative to total body mass influences one's ability to maintain safe landing biomechanics during prolonged exercise when injury incidence increases is unknown. OBJECTIVES:   To examine the influence of LELM on (1) pre-exercise lower extremity biomechanics and (2) changes in biomechanics during an intermittent exercise protocol (IEP) and (3) determine whether these relationships differ by sex. We hypothesized that less LELM would predict higher-risk baseline biomechanics and greater changes toward higher-risk biomechanics during the IEP...
August 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28717620/the-influence-of-muscle-tendon-forces-on-acl-loading-during-jump-landing-a-systematic-review
#9
REVIEW
Katja Oberhofer, S H Hosseini Nasab, Pascal Schütz, Barbara Postolka, Jess G Snedeker, William R Taylor, Renate List
BACKGROUND: The goal of this review is to summarise and discuss the reported influence of muscle-tendon forces on anterior cruciate ligament (ACL) loading during the jump-landing task by means of biomechanical analyses of the healthy knee. METHODS: A systematic review of the literature was conducted using different combinations of the terms "knee", "ligament", "load", "tension ", "length", "strain", "elongation" and "lengthening". 26 original articles (n=16 in vitro studies; n=10 in situ studies) were identified which complied with all inclusion/exclusion criteria...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28712544/the-effect-of-leg-dominance-and-landing-height-on-acl-loading-among-female-athletes
#10
Hossein Mokhtarzadeh, Katie Ewing, Ina Janssen, Chen-Hua Yeow, Nicholas Brown, Peter Vee Sin Lee
Female athletes are more prone to anterior cruciate ligament (ACL) injury. A neuromuscular imbalance called leg dominance may provide a biomechanical explanation. Therefore, the purpose of this study was to compare the side-to-side lower limb differences in movement patterns, muscle forces and ACL forces during a single-leg drop-landing task from two different heights. We hypothesized that there will be significant differences in lower limb movement patterns (kinematics), muscle forces and ACL loading between the dominant and non-dominant limbs...
July 26, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28712025/side-to-side-asymmetries-in-landing-mechanics-from-a-drop-vertical-jump-test-are-not-related-to-asymmetries-in-knee-joint-laxity-following-anterior-cruciate-ligament-reconstruction
#11
Christophe A G Meyer, Paul Gette, Caroline Mouton, Romain Seil, Daniel Theisen
PURPOSE: Asymmetries in knee joint biomechanics and increased knee joint laxity in patients following anterior cruciate ligament reconstruction (ACLR) are considered risk factors for re-tear or early onset of osteoarthritis. Nevertheless, the relationship between these factors has not been established. The aim of the study was to compare knee mechanics during landing from a bilateral drop vertical jump in patients following ACLR and control participants and to study the relationship between side-to-side asymmetries in landing mechanics and knee joint laxity...
July 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28704344/effects-of-altering-trunk-position-during-landings-on-patellar-tendon-force-and-pain
#12
Rodrigo Scattone Silva, Craig R Purdam, Angela M Fearon, Wayne A Spratford, Claire Kenneally-Dabrowski, Peter Preston, Fábio V Serrão, James E Gaida
PURPOSE: To verify the immediate effects of altering sagittal plane trunk position during jump-landings on lower limb biomechanics, patellar tendon force and pain of athletes with and without patellar tendinopathy. METHODS: Twenty-one elite male athletes were categorized into 3 groups, athletes with patellar tendinopathy (TG, n=7), asymptomatic athletes with patellar tendon abnormalities (AG, n=7) and asymptomatic athletes without tendon abnormalities (CG, n=7)...
July 12, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28632776/dynamic-knee-valgus-alignment-influences-impact-attenuation-in-the-lower-extremity-during-the-deceleration-phase-of-a-single-leg-landing
#13
Akihiro Tamura, Kiyokazu Akasaka, Takahiro Otsudo, Jyunya Shiozawa, Yuka Toda, Kaori Yamada
Dynamic knee valgus during landings is associated with an increased risk of non-contact anterior cruciate ligament (ACL) injury. In addition, the impact on the body during landings must be attenuated in the lower extremity joints. The purpose of this study was to investigate landing biomechanics during landing with dynamic knee valgus by measuring the vertical ground reaction force (vGRF) and angular impulses in the lower extremity during a single-leg landing. The study included 34 female college students, who performed the single-leg drop vertical jump...
2017: PloS One
https://www.readbyqxmd.com/read/28627861/effectiveness-of-aquatic-therapy-for-the-control-of-pain-and-increased-functionality-in-people-with-parkinson-s-disease-a-randomized-clinical-trial
#14
Sagrario Pérez de la Cruz
BACKGROUND: Gait, balance disorders and pain associated with Parkinson's disease represent important therapeutic challenges, as they are related with an increased risk of falls, together with disability and physical decline. AIM: To compare the effects of an aquatic Ai Chi training program on the perception of pain, the maintenance of balance and the functional independence of patients with Parkinson's disease. DESIGN: A single-blind randomized controlled trial...
June 19, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28587794/biomechanical-analysis-of-ankle-ligamentous-sprain-injury-cases-from-televised-basketball-games-understanding-when-how-and-why-ligament-failure-occurs
#15
Emmanouil Panagiotakis, Kam-Ming Mok, Daniel Tik-Pui Fong, Anthony M J Bull
OBJECTIVES: Ankle sprains due to landing on an opponent's foot are common in basketball. There is no analysis to date that provides a quantification of this injury mechanism. The aim of this study was to quantify the kinematics of this specific injury mechanism and relate this to lateral ankle ligament biomechanics. DESIGN: Case series. METHODS: The model-based image-matching technique was used to quantify calcaneo-fibular-talar kinematics during four ankle inversion sprain injury incidents in televised NBA basketball games...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28552921/the-influence-of-landing-mat-composition-on-ankle-injury-risk-during-a-gymnastic-landing-a-biomechanical-quantification
#16
Xiaofei Xiao, Weiya Hao, Xuhong Li, Bingjun Wan, Gongbing Shan
PURPOSE: About 70% injury of gymnasts happened during landing - an interaction between gymnast and landing mat. The most injured joint is the ankle. The current study examined the effect of mechanical properties of landing mat on ankle loading with aims to identify means of decreasing the risk of ankle injury. METHOD: Gymnastic skill - salto backward stretched with 3/2 twist was captured by two high-speed camcorders and digitized by using SIMI-Motion software. A subject-specific, 14-segment rigid-body model and a mechanical landing-mat model were built using BRG...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28551203/single-limb-landing-biomechanics-are-altered-and-patellar-tendinopathy-related-pain-is-reduced-with-acute-infrapatellar-strap-application
#17
Adam B Rosen, Jupil Ko, Cathleen N Brown
BACKGROUND: Patellar tendinopathy, a common condition of the knee, is often treated with patellar tendon straps to control pain during dynamic activity. Little is known regarding their effect on pain, landing kinematics and kinetics with their application. The purpose of this study was to determine if patellar tendon straps influenced pain, kinematics at landing and ground reaction forces in individuals with patellar tendinopathy versus healthy controls. METHODS: Thirty participants with patellar tendinopathy and 30 controls participated...
May 24, 2017: Knee
https://www.readbyqxmd.com/read/28513324/biomechanical-comparison-of-countermovement-jumps-performed-on-land-and-in-water-age-effects
#18
Talin Louder, Dennis Dolny, Eadric Bressel
CONTEXT: The aquatic environment provides a low impact alternative to land-based exercise and rehabilitation in older adults. OBJECTIVE: Evaluate the biomechanics of older adults and young adults performing jumping movements on land and in water. DESIGN AND SETTING: Cross-sectional, mixed-factorial experiment; adjustable-depth pool at sports medicine research facility. PARTICIPANTS: Fifty-six young adults (22.0±3.9years) and twelve healthy older adults (57...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28437130/lower-limb-and-trunk-biomechanics-after-fatigue-in-competitive-female-irish-dancers
#19
Catherine Y Wild, Avril Grealish, Diana Hopper
CONTEXT:   Because of the increasing popularity of participation in Irish dance, the incidence of lower limb injuries is high among this competitive population. OBJECTIVE:   To investigate the effects of fatigue on the peak lower limb and trunk angles as well as the peak lower limb joint forces and moments of competitive female Irish dancers during the performance of a dance-specific single-limb landing. DESIGN:   Cross-sectional study...
July 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28417667/immediate-and-short-term-biomechanical-adaptation-of-habitual-barefoot-runners-who-start-shod-running
#20
Ivan P H Au, Fannie O Y Lau, Winko W An, Janet H Zhang, Tony L Chen, Roy T H Cheung
This study investigated the immediate and short-term effects of minimalist shoes (MS) and traditional running shoes (TRS) on vertical loading rates, foot strike pattern and lower limb kinematics in a group of habitual barefoot runners. Twelve habitual barefoot runners were randomly given a pair of MS or TRS and were asked to run with the prescribed shoes for 1 month. Outcome variables were obtained before, immediate after and 1 month after shoe prescription. Average and instantaneous vertical loading rates at the 1-month follow-up were significantly higher than that at the pre-shod session (P < 0...
April 18, 2017: Journal of Sports Sciences
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