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Landing biomechanics

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https://www.readbyqxmd.com/read/27918689/vertical-jump-biomechanics-altered-with-virtual-overhead-goal
#1
Kevin R Ford, Anh-Dung Nguyen, Eric J Hegedus, Jeffrey B Taylor
Virtual environments with real-time feedback can simulate extrinsic goals that mimic real life conditions. The purpose was to compare jump performance and biomechanics with a physical overhead goal (POG) and with a virtual overhead goal (VOG). Fourteen female subjects participated (age: 18.8±1.1 years, height: 163.2±8.1 cm, weight 63.0±7.9 kg). Sagittal plane trunk, hip, and knee biomechanics were calculated during the landing and take-off phases of DVJ with different goal conditions. Repeated measures ANOVAs determined differences between goal conditions...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27874298/volitional-spine-stabilization-during-a-drop-vertical-jump-from-different-landing-heights-implications-for-anterior-cruciate-ligament-injury
#2
Ram Haddas, Troy Hooper, C Roger James, Phillip S Sizer
CONTEXT:  Volitional spine stabilization (VSS) during dynamic activities may alter trunk motion, but the role of the core musculature in positioning the trunk during landing tasks is unclear. OBJECTIVE:  To determine whether volitional core-muscle activation incorporated during a drop vertical jump alters lower extremity kinematics and kinetics, as well as trunk and lower extremity muscle activity at different landing heights. DESIGN:  Controlled laboratory study...
November 22, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27865130/effects-of-fatigue-on-lower-limb-pelvis-and-trunk-kinematics-and-muscle-activation-gender-differences
#3
Giovanna Camparis Lessi, Ana Flávia Dos Santos, Luis Fylipe Batista, Gabriela Clemente de Oliveira, Fábio Viadanna Serrão
BACKGROUND: Muscle fatigue is associated with biomechanical changes that may lead to anterior cruciate ligament (ACL) injuries. Alterations in trunk and pelvis kinematics may also be involved in ACL injury. Although some studies have compared the effects of muscle fatigue on lower limb kinematics between men and women, little is known about its effects on pelvis and trunk kinematics. The aim of the study was to compare the effects of fatigue on lower limb, pelvis and trunk kinematics and muscle activation between men and women during landing...
November 9, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27863284/landing-from-different-heights-biomechanical-and-neuromuscular-strategies-in-trained-gymnasts-and-untrained-prepubescent-girls
#4
Α Christoforidou, D A Patikas, E Bassa, I Paraschos, S Lazaridis, C Christoforidis, C Kotzamanidis
The purpose of this study was to examine the biomechanics of the lower limb, during landing in female prepubertal gymnasts and prepubertal untrained girls, aged 9-12years. Ten healthy participants were included in each group and performed five landings from 20, 40, and 60cm. Kinematics, ground reaction forces (GRF) and electromyogram (EMG) from the lateral gastrocnemius, tibialis anterior, and vastus lateralis are presented. Gymnasts had higher vertical GRF and shorter braking phase during landing. Compared to untrained girls, gymnasts exhibited for all examined drop heights more knee flexion before and at ground contact, but less knee flexion at maximum knee flexion position...
November 9, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27794536/adaptive-patterns-in-aquatic-amniote-bone-microanatomy-more-complex-than-previously-thought
#5
REVIEW
Alexandra Houssaye, P Martin Sander, Nicole Klein
Numerous amniote groups adapted to an aquatic life. This change of habitat naturally led to numerous convergences. The various adaptive traits vary depending on the degree of adaptation to an aquatic life, notably between shallow water taxa still able to occasionally locomote on land and open-marine forms totally independent from the terrestrial environment, but also between surface swimmers and deep divers. As a consequence, despite convergences, there is a high diversity within aquatic amniotes in e.g., shape, size, physiology, swimming mode...
October 29, 2016: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/27777742/phylogenetic-comparisons-of-pedestrian-locomotion-costs-confirmations-and-new-insights
#6
Craig R White, Lesley A Alton, Taryn S Crispin, Lewis G Halsey
The energetic costs for animals to locomote on land influence many aspects of their ecology. Size accounts for much of the among-species variation in terrestrial transport costs, but species of similar body size can still exhibit severalfold differences in energy expenditure. We compiled measurements of the (mass-specific) minimum cost of pedestrian transport (COTmin, mL/kg/m) for 201 species - by far the largest sample to date - and used phylogenetically informed comparative analyses to investigate possible eco-evolutionary differences in COTmin between various groupings of those species...
September 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27760491/influence-of-short-term-inertial-training-on-swimming-performance-in-young-swimmers
#7
Mariusz Naczk, Artur Lopacinski, Wioletta Brzenczek-Owczarzak, Jarosław Arlet, Alicja Naczk, Zdzisław Adach
The aim of this study was to evaluate the influence of dry-land inertial training (IT) on muscle force, muscle power, and swimming performance. Fourteen young, national-level, competitive swimmers were randomly divided into IT and control (C) groups. The experiment lasted four weeks, during which time both groups underwent their regular swimming training. In addition, the IT group underwent IT using the Inertial Training Measurement System (ITMS) three times per week. The muscle groups involved during the upsweep phase of the arm stroke in front crawl and butterfly stroke were trained...
October 19, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27637264/stiff-landings-are-associated-with-increased-acl-injury-risk-in-young-female-basketball-and-floorball-players
#8
Mari Leppänen, Kati Pasanen, Urho M Kujala, Tommi Vasankari, Pekka Kannus, Sami Äyrämö, Tron Krosshaug, Roald Bahr, Janne Avela, Jarmo Perttunen, Jari Parkkari
BACKGROUND: Few prospective studies have investigated the biomechanical risk factors of anterior cruciate ligament (ACL) injury. PURPOSE: To investigate the relationship between biomechanical characteristics of vertical drop jump (VDJ) performance and the risk of ACL injury in young female basketball and floorball players. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: At baseline, a total of 171 female basketball and floorball players (age range, 12-21 years) participated in a VDJ test using 3-dimensional motion analysis...
September 16, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27632861/landing-technique-improvements-after-an-aquatic-based-neuromuscular-training-program-in-physically-active-females
#9
Samantha E Scarneo, Hayley J Root, Jessica C Martinez, Craig Denegar, Douglas J Casa, Stephanie M Mazerolle, Catie L Dann, Giselle Aerni, Lindsay J DiStefano
CONTEXT: Neuromuscular training programs (NTPs) improve landing technique and decrease vertical ground reaction forces (VGRF) resulting in injury risk reduction. NTPs in an aquatic environment may elicit the same improvements as land-based programs with reduced joint stress. OBJECTIVE: To examine the effects of an aquatic NTP on landing technique, as measured by the Landing Error Scoring System (LESS) and VGRF, immediately and 4-months following the intervention...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27632838/effects-of-volitional-spine-stabilization-and-lower-extremity-fatigue-on-knee-and-ankle-during-landing-performance-in-a-recurrent-low-back-pain-population
#10
Ram Haddas, Steven F Sawyer, Phillip S Sizer, Toby Brooks, Ming-Chien Chyu, C Roger James
INTRODUCTION: Recurrent LBP (rLBP) and neuromuscular fatigue are independently thought to increase the risk of lower extremity (LE) injury. Volitional preemptive abdominal contraction (VPAC) is thought to improve lumbar spine and pelvis control in individuals with rLBP. The effects of VPAC on fatigued landing performance in individuals with rLBP are unknown. OBJECTIVES: To determine the effects of VPAC and LE fatigue on landing performance in a rLBP population. DESIGN: Cross-sectional pretest-posttest cohort control design...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27591317/amphibious-fish-jump-better-on-land-after-acclimation-to-a-terrestrial-environment
#11
E Brunt, A J Turko, G R Scott, P A Wright
Air and water differ dramatically in density and viscosity, posing different biomechanical challenges for animal locomotion. We asked how terrestrial acclimation influences locomotion in amphibious fish, specifically testing the hypothesis that terrestrial tail flip performance is improved by plastic changes in the skeletal muscle. Mangrove rivulus Kryptolebias marmoratus, which remain largely inactive out of water, were exposed to water or air for 14 days and a subgroup of air-exposed fish was also recovered in water...
September 2, 2016: Journal of Experimental Biology
https://www.readbyqxmd.com/read/27508258/single-leg-landing-neuromechanical-data-following-load-and-land-height-manipulations
#12
Andrew D Nordin, Janet S Dufek
Lower extremity sagittal kinematic and kinetic data are summarized alongside electrical muscle activities during single-leg landing trials completed in contrasting external load and landing height conditions. Nineteen subjects were analyzed during 9 landing trials in each of 6 experimental conditions computed as percentages of subject anthropometrics (bodyweight: BW and subject height: H; BW, BW+12.5%, BW+25%, and H12.5%, H25%). Twelve lower extremity variables (sagittal hip, knee, ankle angles and moments, vertical ground reaction force (GRFz), gluteus maximus, biceps femoris, vastus medials, medial gastrocnemius, and tibialis anterior muscles) were assessed using separate principal component analyses (PCA)...
September 2016: Data in Brief
https://www.readbyqxmd.com/read/27474385/utilization-of-acl-injury-biomechanical-and-neuromuscular-risk-profile-analysis-to-determine-the-effectiveness-of-neuromuscular-training
#13
Timothy E Hewett, Kevin R Ford, Yingying Y Xu, Jane Khoury, Gregory D Myer
BACKGROUND: The widespread use of anterior cruciate ligament (ACL) injury prevention interventions has not been effective in reducing the injury incidence among female athletes who participate in high-risk sports. PURPOSE/HYPOTHESIS: The purpose of this study was to determine if biomechanical and neuromuscular factors that contribute to the knee abduction moment (KAM), a predictor of future ACL injuries, could be used to characterize athletes by a distinct factor...
December 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27465632/a-novel-mass-spring-damper-model-analysis-to-identify-landing-deficits-in-athletes-returning-to-sport-after-acl-reconstruction
#14
Daniel K Schneider, Alli Gokeler, Bert Otten, Kevin R Ford, Timothy E Hewett, Jon Divine, Angelo J Colosimo, Robert S Heidt, Gregory D Myer
A mass-spring-damper model may serve as an extension of biomechanical data from three-dimensional motion analysis and epidemiological data which help to delineate populations at-risk for anterior cruciate ligament (ACL) injuries. The purpose of this study was to evaluate such a model.\Thirty-six ACL reconstruction (ACLR) group subjects and 67 controls (CTRL) completed single-leg drop landing and single-leg broad jump tasks. Landing ground reaction force data were collected and analyzed with a mass-spring damper model...
July 19, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27428644/innovative-video-feedback-on-jump-landing-improves-landing-technique-in-males
#15
J Dallinga, A Benjaminse, A Gokeler, N Cortes, E Otten, K Lemmink
Video feedback may be a powerful tool to change biomechanical landing patterns associated with anterior cruciate ligament (ACL) injury risk. This study investigated the effect of video feedback on drop vertical jump (DVJ) landing strategies in team sport athletes. 59 athletes were assigned to a video feedback (VI) or control (CTRL) group. A pretest, 2 training sessions and a posttest were conducted. In both training sessions, video feedback, consisting of a video of the athlete's contour superimposed onto an expert's contour performing the DVJ landing task, was provided to the VI group; the CTRL group did not receive feedback...
July 18, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27398920/vertical-vs-horizontal-oriented-drop-jump-training-chronic-effects-on-explosive-performances-of-elite-handball-players
#16
Dello Iacono Antonio, Domenico Martone, Mirjana Milic, Padulo Johnny
This study aimed to assess the chronic effects of vertical and horizontal drop-jump-based protocols on neuromuscular explosive abilities such as jumping, sprinting, and change of direction (COD). Eighteen elite male handball players (age 23.4 ± 4.6 years; height 192.5 ± 3.7 cm; weight 87.8 ± 7.4 kg) were assigned to either vertical drop jump (VDJ) or horizontal drop jump (HDJ) group training twice a week for 10 weeks. Participants performed 5-8 sets × 6-10 repetitions of vertical-alternate (VDJ) or horizontal-alternate (HDJ) one-leg drop-jumps, landing from the top of a platform 25 cm in height...
July 7, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27385545/exploring-the-biomechanical-load-of-a-sliding-on-the-skin-understanding-the-acute-skin-injury-mechanism-of-player-surface-interaction
#17
Wilbert VAN DE Eijnde, Kenneth Meijer, Edwin Lamers, Malou Peppelman, Piet VAN Erp
BACKGROUND: Currently, there is a shortage of biomechanical data regarding acute skin injury mechanisms that are involved in player-surface contact in soccer on artificial turf. It is hypothesized that peak loads on the skin during the landing phase are an important factor in causing an acute skin injury. METHODS: Simultaneously, video analysis and load measurements using an in-ground force plate of the landing phase of a sliding tackle were recorded and correlated with observed clinical skin lesions...
July 6, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27361286/developmental-and-inter-limb-differences-in-acl-relevant-biomechanics-during-single-leg-landing-2650-board-173-june-3-11-00-am-12-30-pm
#18
Timothy A Sayer, Alessandro Timmi, Karine Fortin, Kade L Paterson, Rana S Hinman, Kim L Bennell, Peter Pivonka, Adam L Bryant
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27361284/effect-of-limb-dominance-on-landing-biomechanics-prior-to-a-cutting-movement-2648-board-171-june-3-11-00-am-12-30-pm
#19
Jae P Yom, Scott Arnett, Kathy Jean Simpson
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27361282/differences-in-first-and-second-landing-biomechanics-during-the-vertical-drop-jump-task-in-female-athletes-2646-board-169-june-3-11-00-am-12-30-pm
#20
Donna M Scarborough, Eric M Berkson, Valerie A Cohen, Luke S Oh
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
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