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Landing biomechanics

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https://www.readbyqxmd.com/read/29098684/comparative-hindlimb-myology-of-foot-propelled-swimming-birds
#1
Glenna T Clifton, Jennifer A Carr, Andrew A Biewener
Several groups of birds have convergently evolved the ability to swim using their feet despite facing trade-offs with walking. However, swimming relative to terrestrial performance varies across these groups. Highly specialized divers, such as loons and grebes, excel at swimming underwater but struggle to stand on land, whereas species that primarily swim on the water surface, such as Mallards, retain the ability to move terrestrially. The identification of skeletal features associated with a swimming style and conserved across independent groups suggests that the hindlimb of foot-propelled swimming birds has adapted to suit the physical challenges of producing propulsive forces underwater...
November 3, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29097231/poor-anaerobic-power-capability-and-static-balance-predicted-prospective-musculoskeletal-injuries-among-soldiers-of-the-101st-airborne-air-assault-division
#2
Takashi Nagai, Mita Lovalekar, Meleesa F Wohleber, Katherine A Perlsweig, Michael D Wirt, Kim Beals
Musculoskeletal injuries have negatively impacted tactical readiness. The identification of prospective and modifiable risk factors of preventable musculoskeletal injuries can guide specific injury prevention strategies for Soldiers and health care providers. OBJECTIVES: To analyze physiological and neuromuscular characteristics as predictors of preventable musculoskeletal injuries. DESIGN: Prospective-cohort study. METHODS: A total of 491 Soldiers were enrolled and participated in the baseline laboratory testing, including body composition, aerobic capacity, anaerobic power/capacity, muscular strength, flexibility, static balance, and landing biomechanics...
October 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29065078/biomechanical-differences-of-multidirectional-jump-landings-among-female-basketball-and-soccer-players
#3
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Taylor, JB, Ford, KR, Schmitz, RJ, Ross, SE, Ackerman, TA, and Shultz, SJ. Biomechanical differences of multidirectional jump landings among female basketball and soccer players. J Strength Cond Res 31(11): 3034-3045, 2017-Anterior cruciate ligament (ACL) 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 multidirectional jump landings...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29043110/neurodynamic-mobilization-and-foam-rolling-improved-delayed-onset-muscle-soreness-in-a-healthy-adult-population-a-randomized-controlled-clinical-trial
#4
Blanca Romero-Moraleda, Roy La Touche, Sergio Lerma-Lara, Raúl Ferrer-Peña, Víctor Paredes, Ana Belén Peinado, Daniel Muñoz-García
OBJECTIVES: Compare the immediate effects of a Neurodynamic Mobilization (NM) treatment or foam roller (FR) treatment after DOMS. DESIGN: Double blind randomised clinical trial. SETTING: The participants performed 100 drop jumps (5 sets of 20 repetitions, separated by 2 min rests) from a 0.5-m high box in a University biomechanics laboratory to induce muscle soreness. The participants were randomly assigned in a counter-balanced fashion to either a FR or NM treatment group...
2017: PeerJ
https://www.readbyqxmd.com/read/28959697/acl-injury-prevention-training-results-in-modification-of-hip-and-knee-mechanics-during-a-drop-landing-task
#5
Christine D Pollard, Susan M Sigward, Christopher M Powers
BACKGROUND: Injury prevention training has been shown to be effective in reducing the incidence of noncontact anterior cruciate ligament (ACL) injury; however, the underlying reason for the success of these training programs is unclear. PURPOSE: To investigate whether an ACL injury prevention program that has been shown to reduce the incidence of ACL injury alters sagittal plane hip and knee biomechanics during a drop-landing task. STUDY DESIGN: Descriptive laboratory study...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28952862/evaluation-of-agreement-between-participant-and-expert-on-jump-landing-characteristics-during-a-4-week-intervention
#6
Hayley M Ericksen, Brian Pietrosimone, Phillip A Gribble, Abbey C Thomas
CONTEXT: Feedback is an important factor of interventions designed to reduce anterior cruciate ligament injury risk. Self-analysis feedback requires participants to self-critique their jump landing mechanics; however it is unknown if individuals are able to effectively self-analyze their own biomechanics and if this self-analysis agrees with observed biomechanical changes by an expert. OBJECTIVE: Determine agreement between an expert and participants on biomechanical errors committed during 3 of 12 sessions which were part of an intervention to change jump-landing biomechanics in healthy females...
September 27, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28929927/ankle-taping-can-reduce-external-ankle-joint-moments-during-drop-landings-on-a-tilted-surface
#7
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
#8
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
#9
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 13, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28802431/ankle-restrictive-firefighting-boots-alter-the-lumbar-biomechanics-during-landing-tasks
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
Rodrigo Scattone Silva, Craig R Purdam, Angela M Fearon, Wayne A Spratford, Claire Kenneally-Dabrowski, Peter Preston, Fábio V Serrão, James E Gaida
PURPOSE: This study aimed 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 three groups: athletes with patellar tendinopathy (TG; n = 7), asymptomatic athletes with patellar tendon abnormalities (n = 7), and asymptomatic athletes without tendon abnormalities (CG; n = 7)...
December 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
#19
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
#20
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
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