keyword
MENU ▼
Read by QxMD icon Read
search

drop jump

keyword
https://www.readbyqxmd.com/read/29334674/relationship-between-jumping-abilities-and-skeletal-muscle-architecture-of-lower-limbs-in-humans-systematic-review-and-meta-analysis
#1
J D Ruiz-Cárdenas, J J Rodríguez-Juan, J Ríos-Díaz
The aim of this study was to examine the influence of skeletal muscle architecture (SMA) features measured by 2-D ultrasonography on jumping performance in humans. A systematic review and meta-analysis was conducted, registry number: CRD42016043602. The scientific literature was systematically searched in eight databases, last run on March 14th, 2017. Cross-sectional studies focused on the association between SMA features and vertical jumping performance were selected. A random-effects model was used to analyze the influence of lower-limb SMA and maximal jump height...
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29320946/cognitive-demands-influence-lower-extremity-mechanics-during-a-drop-vertical-jump-task-in-female-athletes
#2
Thomas Gus Almonroeder, Thomas Kernozek, Stephen Cobb, Brooke Slavens, Jinsung Wang, Wendy Huddleston
Study Design Cross-sectional study. Background The drop vertical jump task is commonly used in anterior cruciate ligament injury risk screening; however, the predictive validity is limited. Part of the limited predictive validity may be because the drop vertical jump task does not impose cognitive demands that reflect sports participation. Objectives To investigate the influence of additional cognitive demands on lower extremity mechanics during execution of the drop vertical jump task. Methods Twenty uninjured females (ages 18-25 years old) were required to perform the standard drop vertical jump task, as well as drop vertical jumps which included additional cognitive demands...
January 10, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29318174/sagittal-plane-hip-knee-and-ankle-biomechanics-and-the-risk-of-anterior-cruciate-ligament-injury-a-prospective-study
#3
Mari Leppänen, Kati Pasanen, Tron Krosshaug, Pekka Kannus, Tommi Vasankari, Urho M Kujala, Roald Bahr, Jarmo Perttunen, Jari Parkkari
Background: Stiff landings with less knee flexion and high vertical ground-reaction forces have been shown to be associated with an increased risk of anterior cruciate ligament (ACL) injury. The literature on the association between other sagittal plane measures and the risk of ACL injuries with a prospective study design is lacking. Purpose: To investigate the relationship between selected sagittal plane hip, knee, and ankle biomechanics and the risk of ACL injury in young female team-sport athletes...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29315840/ballistic-jumping-drops-on-superhydrophobic-surfaces-via-electrostatic-manipulation
#4
Ning Li, Lei Wu, Cunlong Yu, Haoyu Dai, Ting Wang, Zhichao Dong, Lei Jiang
The ballistic ejection of liquid drops by electrostatic manipulating has both fundamental and practical implications, from raindrops in thunderclouds to self-cleaning, anti-icing, condensation, and heat transfer enhancements. In this paper, the ballistic jumping behavior of liquid drops from a superhydrophobic surface is investigated. Powered by the repulsion of the same kind of charges, water drops can jump from the surface. The electrostatic acting time for the jumping of a microliter supercooled drop only takes several milliseconds, even shorter than the time for icing...
January 9, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29300147/relationships-between-highly-skilled-golfers-clubhead-velocity-and-force-producing-capabilities-during-vertical-jumps-and-an-isometric-mid-thigh-pull
#5
Jack E T Wells, Andrew C S Mitchell, Laura H Charalambous, Iain M Fletcher
Whilst previous research has highlighted significant relationships between golfers' clubhead velocity (CHV) and their vertical jump height and maximum strength, these field-based protocols were unable to measure the actual vertical ground reaction force (vGRF) variables that may correlate to performance. The aim of this study was to investigate relationships between isometric mid-thigh pull (IMTP), countermovement jump (CMJ), squat jump (SJ) and drop jump (DJ) vGRF variables and CHV in highly skilled golfers...
January 4, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29239779/gender-differences-in-residual-effect-of-prior-drop-jumps-on-oxygen-uptake-during-heavy-cycling-exercise
#6
Neringa Baranauskienė, Sandra Kilikevičienė, Loreta Stasiulė, Genuvaitė Civinskienė, Arvydas Stasiulis
BACKGROUND AND OBJECTIVE: Unaccustomed eccentric or eccentric-concentric exercise leaves us stiff and sore the next day and can cause muscle damage. The data about the residual effect of prior eccentric-concentric exercises on oxygen uptake (VO2) during constant cycling exercise in women or the data about differences of such effect between genders are scarce. Therefore, the aim of this study was to assess differences of the residual effect of PDJ on VO2 during HCE and indirect muscle damage parameters between women and men...
November 1, 2017: Medicina
https://www.readbyqxmd.com/read/29238255/does-shoe-collar-height-influence-ankle-joint-kinematics-and-kinetics-in-sagittal-plane-maneuvers
#7
Yang Yang, Ying Fang, Xini Zhang, Junliang He, Weijie Fu
The Objective of the study is to investigate the effects of basketball shoes with different collar heights on ankle kinematics and kinetics and athletic performance in different sagittal plane maneuvers. Twelve participants who wore high-top and low-top basketball shoes (hereafter, HS and LS, respectively) performed a weight-bearing dorsiflexion (WB-DF) maneuver, drop jumps (DJs), and lay-up jumps (LJs). Their sagittal plane kinematics and ground reaction forces were recorded using the Vicon motion capture system and Kistler force plates simultaneously...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29233241/protective-knee-braces-and-the-biomechanics-of-the-half-squat-parachute-landing
#8
Di Wu, Chao Zheng, Ji Wu, Longfeng Wang, Xiang Wei, Lizheng Wang
INTRODUCTION: Knee injuries are common among paratroopers and skydivers during landing maneuvers. The aim of this study was to investigate the effects of dropping height and the use of protective knee braces on parachute landing biomechanics. METHODS: The study cohort consisted of 30 male elite paratroopers with formal parachute landing training and more than 2 yr of parachute jumping experience. Each participant was instructed to jump off a platform at two different heights (40 and 80 cm, respectively) and land on force plates in a half-squat posture...
January 1, 2018: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29182434/reactive-strength-index-a-poor-indicator-of-reactive-strength
#9
Robin Healy, Ian Kenny, Drew Harrison
PURPOSE: The primary aim was to assess the relationships between reactive strength measures and associated kinematic and kinetic performance variables achieved during drop jumps. A secondary aim was to highlight issues with the use of reactive strength measures as performance indicators. METHODS: Twenty eight national and international level sprinters, consisting of fourteen men and women, participated in this cross-sectional analysis. Athletes performed drop jumps from a 0...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29179480/neutrophil-lymphocyte-ratio-is-a-more-sensitive-systemic-inflammatory-response-biomarker-than-platelet-lymphocyte-ratio-in-the-prognosis-evaluation-of-unresectable-pancreatic-cancer
#10
Yuan Gao, Wen-Jie Wang, Qiaoming Zhi, Meng Shen, Min Jiang, Xiaojie Bian, Fei-Ran Gong, Chong Zhou, Lian Lian, Meng-Yao Wu, Jun Feng, Min Tao, Wei Li
Multiple cancers arise from sites of infection, chronic irritation, and inflammation. It has been widely accepted that pancreatic cancer is an inflammation-driven cancer. In this study, we investigated the application value of systemic inflammatory markers, neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR), in the prediction of chemotherapy response and prognosis in patients with late pancreatic cancer. 122 patients with inoperable pancreatic cancers were included and separated into two groups according to median values of NLR or PLR (NLR low:<3...
October 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/29163219/neuromuscular-training-improves-lower-extremity-biomechanics-associated-with-knee-injury-during-landing-in-11-13-year-old-female-netball-athletes-a-randomized-control-study
#11
Amanda J Hopper, Erin E Haff, Christopher Joyce, Rhodri S Lloyd, G Gregory Haff
The purpose of this study was to examine the effects of a neuromuscular training (NMT) program on lower-extremity biomechanics in youth female netball athletes. The hypothesis was that significant improvements would be found in landing biomechanics of the lower-extremities, commonly associated with anterior cruciate ligament (ACL) injury, following NMT. Twenty-three athletes (age = 12.2 ± 0.9 years; height = 1.63 ± 0.08 m; mass = 51.8 ± 8.5 kg) completed two testing sessions separated by 7-weeks and were randomly assigned to either a experimental or control group...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29154692/landing-kinematics-and-kinetics-at-the-knee-during-different-landing-tasks
#12
Nicholas R Heebner, Deirdre M Rafferty, Meleesa F Wohleber, Andrew J Simonson, Mita Lovalekar, Andrew Reinert, Timothy C Sell
CONTEXT:   Several tasks have been used to examine landing biomechanics for evaluation and rehabilitation, especially as related to anterior cruciate ligament injuries. However, comparing results among studies in which different tasks were used can be difficult, and it is unclear which task may be most appropriate. OBJECTIVE:   To compare lower extremity biomechanics across 5 commonly used landing tasks. DESIGN:   Descriptive laboratory study...
November 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29150657/specific-heat-electrical-resistivity-and-electronic-band-structure-properties-of-noncentrosymmetric-th7fe3-superconductor
#13
V H Tran, M Sahakyan
Noncentrosymmetric superconductor Th7Fe3 has been investigated by means of specific heat, electrical resisitivity measurements and electronic properties calculations. Sudden drop in the resistivity at 2.05 ± 0.15 K and specific heat jump at 1.98 ± 0.02 K are observed, rendering the superconducting transition. A model of two BCS-type gaps appears to describe the zero-magnetic-field specific heat better than those based on the isotropic BCS theory or anisotropic functions. A positive curvature of the upper critical field H c2(T c) and nonlinear field dependence of the Sommerfeld coefficient at 0...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29130570/cold-water-or-partial-body-cryotherapy-comparison-of-physiological-responses-and-recovery-following-muscle-damage
#14
Erich Hohenauer, Joseph T Costello, Rahel Stoop, Ursula M Küng, Peter Clarys, Tom Deliens, Ron Clijsen
The aim of this study was to compare i) the physiological responses following cold-water immersion (CWI) and partial-body cryotherapy (PBC) and ii) the effects on recovery following a muscle-damaging protocol (5 x 20 drop jumps). Nineteen healthy males were randomly allocated into either a CWI (10 °C for 10 min; n = 9) or a PBC (-60 °C for 30 sec, -135 °C for 2 min; n = 10) group. The physiological variables (thigh muscle oxygen saturation [SmO2 ], cutaneous vascular conductance [CVC], mean-arterial pressure [MAP] and local skin temperature) were assessed immediately prior and up to 60 min post-treatment (10 min intervals)...
November 11, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29123488/wearing-compression-tights-on-the-thigh-during-prolonged-running-attenuated-exercise-induced-increase-in-muscle-damage-marker-in-blood
#15
Sahiro Mizuno, Mari Arai, Fumihiko Todoko, Eri Yamada, Kazushige Goto
Purpose: To examine the effects of wearing a lower-body compression garment with different body coverage areas during prolonged running on exercise performance and muscle damage. Methods: Thirty male subjects were randomly assigned to one of three groups: (1) wearing a compression tights with 15 mmHg to thigh [n = 10, CT group], (2) wearing a compression socks with 15 mmHg to calf [n = 10, CS group], and (3) wearing a lower-body garment with < 5 mmHg to thigh and calf [n = 10, CON group]. The exercise consisted of 120 min of uphill running at 55% of [Formula: see text]O2max...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29121680/effects-of-drop-height-and-surface-instability-on-jump-performance-and-knee-kinematics
#16
Melanie Lesinski, Olaf Prieske, Rainer Beurskens, David Behm, Urs Granacher
The purpose of this study was to examine the combined effects of drop-height and surface condition on drop jump (DJ) performance and knee joint kinematics. DJ performance, sagittal and frontal plane knee joint kinematics were measured in jump experienced young male and female adults during DJs on stable, unstable and highly unstable surfaces using different drop-heights (20, 40, 60 cm). Findings revealed impaired DJ performance (Δ5-16%; p<0.05; 1.43≤d≤2.82), reduced knee valgus motion (Δ33-52%; p<0...
November 9, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29091539/do-bilateral-vertical-jumps-with-reactive-jump-landings-achieve-osteogenic-thresholds-with-and-without-instruction-in-premenopausal-women
#17
Tracey L Clissold, Paul W Winwood, John B Cronin, Mary Jane De Souza
Jumps have been investigated as a stimulus for bone development, however effects of instruction, jump type and jump-landing techniques need investigation. This study sought to identify whether ground reaction forces (GRF's) for bilateral vertical jumps (countermovement jumps and drop jumps) with reactive jump-landings (i.e. jumping immediately after initial jump-landing), with instruction and with instruction withdrawn, achieve magnitudes and rates of strain previously shown to improve bone mass among premenopausal women...
November 1, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29091512/knee-frontal-plane-projection-angle-a-comparison-study-between-drop-vertical-jump-and-step-down-tests-with-young-volleyball-athletes
#18
Gabriel Andrade Paz, Marianna de Freitas Maia, Haroldo Gualter Santana, Humberto Miranda, Vicente Lima, John D Willson
STUDY DESIGN: Observational study. CONTEXT: Altered frontal plane knee mechanics during dynamic tasks have been often associated with lower extremity injuries. Strategies to decrease these risk factors and improve knee joint stability are often applied in rehabilitation and training environments. OBJECTIVE: The purpose of this study was to compare knee joint frontal plane projection angles (FPPA) via two dimensional (2D) video analysis during drop vertical jump (DVJ) and step-down test (SDT) tasks in the preferred and non-preferred limbs of young male and female volleyball players...
November 1, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29073841/individuals-post-achilles-tendon-rupture-exhibit-asymmetrical-knee-and-ankle-kinetics-and-loading-rates-during-a-drop-countermovement-jump
#19
Hayley C Powell, Karin Grävare Silbernagel, Annelie Brorsson, Roy Tranberg, Richard W Willy
Study Design Cross-sectional laboratory study. Background Asymmetrical knee loading during jogging and hopping has been reported in individuals who have ruptured their Achilles tendon. No studies have examined knee loads in individuals post Achilles tendon rupture during high-demand tasks, such as single-limb landings. Objectives We sought to determine whether individuals post Achilles tendon rupture demonstrated asymmetrical knee loads and impact forces during drop countermovement jumps (CMJs). Methods Achilles tendon length and the single-leg heel-rise test for endurance were assessed in 34 individuals (31 male) 6...
January 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29065622/effects-of-two-fatigue-protocols-on-impact-forces-and-lower-extremity-kinematics-during-drop-landings-implications-for-noncontact-anterior-cruciate-ligament-injury
#20
Rui Xia, Xini Zhang, Xi Wang, Xiaole Sun, Weijie Fu
The purpose of the study was to determine the effects of fatigue on the impact forces and sagittal plane kinematics of the lower extremities in a drop landing task. 15 male collegiate athletes were recruited. Five successful trials of a drop landing task were obtained during prefatigue and postfatigue in two fatigue protocols (constant speed running fatigue protocol [R-FP] and shuttle running + vertical jumping fatigue protocol [SV-FP]). Duration time, maximal heart rate, and RPE of each protocol were measured separately...
2017: Journal of Healthcare Engineering
keyword
keyword
91135
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"