Abstract：
:In vaulting a gymnast must generate sufficient linear and angular momentum during the approach and table contact to complete the rotational requirements in the post-flight phase. This study investigated the optimization of table touchdown conditions and table contact technique for the maximization of rotation potential for forwards rotating vaults. A planar seven-segment torque-driven computer simulation model of the contact phase in vaulting was evaluated by varying joint torque activation time histories to match three performances of a handspring double somersault vault by an elite gymnast. The closest matching simulation was used as a starting point to maximize post-flight rotation potential (the product of angular momentum and flight time) for a forwards rotating vault. It was found that the maximized rotation potential was sufficient to produce a handspring double piked somersault vault. The corresponding optimal touchdown configuration exhibited hip flexion in contrast to the hyperextended configuration required for maximal height. Increasing touchdown velocity and angular momentum lead to additional post-flight rotation potential. By increasing the horizontal velocity at table touchdown, within limits obtained from recorded performances, the handspring double somersault tucked with one and a half twists, and the handspring triple somersault tucked became theoretically possible.
journal_name
Hum Mov Scijournal_title
Human movement scienceauthors
Hiley MJ,Jackson MI,Yeadon MRdoi
10.1016/j.humov.2015.05.006subject
Has Abstractpub_date
2015-08-01 00:00:00pages
117-31eissn
0167-9457issn
1872-7646pii
S0167-9457(15)00089-5journal_volume
42pub_type
杂志文章abstract：:The present study investigated Bernstein's [The co-ordination and regulation of movements, 1967] proposal regarding the three stages of learning in the changing coordination and control of redundant joint-space degrees of freedom. Six participants practiced maintaining balance on a moving platform that was sinusoidall...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/s0167-9457(02)00177-x
更新日期：2003-02-01 00:00:00
abstract：:The protracted maturation and development of speech articulation underlies the complexity of the skill, and suggests it may be an area susceptible to a general deficit in motor control. Recent research suggests a high co-occurrence between Developmental Coordination Disorder (DCD) and disordered speech production. Des...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.01.007
更新日期：2010-08-01 00:00:00
abstract：:The aim of this study was to investigate the relationship between in quadriceps and hamstrings inter-limb strength asymmetry and change of direction, sprinting and jumping abilities in U21 elite soccer players. Twenty-seven soccer players volunteered for this study. Isokinetic quadriceps and hamstrings peak torque was...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.03.016
更新日期：2018-06-01 00:00:00
abstract：:The purpose of this study was to gain insight into the kinematics and kinetics of the vertical jump when jumping for different heights and to investigate movement effectiveness as a criterion for movement control in submaximal jumping. In order to jump high a countermovement is used and large body segments are rotated...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2003.11.001
更新日期：2004-04-01 00:00:00
abstract：:Proprioception of the upper extremity is commonly measured using joint position sense tasks. Recent evidence suggests heightened position sense at elevation angles in the shoulder and elbow near 90° in the sagittal plane. The influence of external torque has been suggested to play a pivotal role in the heightened acui...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.09.005
更新日期：2018-12-01 00:00:00
abstract：:Previous studies found little or no transfer of adaptation from reactive saccades to arm pointing movements, which suggests that the two motor systems rely on distinct adaptive mechanisms. However, this conclusion is based on experiments about the adaptation of response amplitudes, which is known to follow somewhat di...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2008.01.001
更新日期：2008-06-01 00:00:00
abstract：:Through pressure measurement and underwater motion capture analysis, this study aimed to elucidate the effects of hand paddles on hand propulsive forces, mechanical power, and Froude efficiency in arm-stroke-only front-crawl swimming at various velocities. Eight male swimmers swam under two conditions in randomized or...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.03.007
更新日期：2019-04-01 00:00:00
abstract：:Anticipatory responses to inversion perturbations can prevent an accurate assessment of lateral ankle sprain mechanics when using injury simulations. Despite recent evidence of the anticipatory motor control strategies utilized during inversion perturbations, kinetic compensations during anticipated inversion perturba...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.03.015
更新日期：2019-03-22 00:00:00
abstract：:The present study examined the extent to which game format (possession play, SSG-P and game with regular goals and goalkeepers, SSG-G) and the number of players (5, 7 and 10 a-side) influence the physical demands of small-sided soccer games (SSGs) in elite soccer players. Training data were collected during the in-sea...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.05.006
更新日期：2014-08-01 00:00:00
abstract：:Load carriage can be harmful for workers, and alternative interventions to reduce back pain while walking and carrying loads are necessary. Unstable shoes have been used to improve balance and reduce back pain, but it is unknown whether walking wearing unstable shoes while carrying loads anteriorly causes excessive tr...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.10.010
更新日期：2017-12-01 00:00:00
abstract：:The aim of this study was to evaluate whether a mental training protocol could improve gymnastic jumping performance. Seventy-two rhythmic gymnasts were randomly divided into an experimental and control group. At baseline, experimental group completed the Movement Imagery Questionnaire Revised (MIQ-R) to assess the gy...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.10.001
更新日期：2014-12-01 00:00:00
abstract：:Using dynamical modeling tools, the aim of the study was to establish a minimal model reproducing leg movements in cross-country skiing, and to evaluate the eventual adjustments of this model with fatigue. The participants (N=8) skied on a treadmill at 90% of their maximal oxygen consumption, up to exhaustion, using t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.03.001
更新日期：2010-08-01 00:00:00
abstract：:Healthy children (n=12, age 7years) and young adults (n=11, age 21years) were asked to perform a bimanual balance and reaching protocol in a seated posture. Subjects balanced a ball on a Frisbee on the non-dominant palm of the hand while reaching with the dominant hand to pick up a toy off the ground. During half of t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.03.001
更新日期：2015-06-01 00:00:00
abstract：:This review describes a novel view on stages in motor learning based on recent developments of the notion of synergies, the uncontrolled manifold hypothesis, and the equilibrium-point hypothesis (referent configuration) that allow to merge these notions into a single scheme of motor control. The principle of abundance...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2009.11.002
更新日期：2010-10-01 00:00:00
abstract：:Gurfinkel and colleagues (2006) recently found that healthy adults dynamically modulate postural muscle tone in the body axis during anti-gravity postural maintenance and that this modulation is inversely correlated with axial stiffness. Our objective in the present study was to investigate whether dynamic modulation ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.10.002
更新日期：2011-02-01 00:00:00
abstract：:If the magnitude of timing and angle variability in whole body coordinated movements were known, this would allow more realistic levels of variability to be included within optimizations of technique. The aim of this study was to determine the technique for improved consistency of performance of the Tkatchev release a...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2011.08.009
更新日期：2012-08-01 00:00:00
abstract：:Falls are common in older adults. The most common cause of falls is tripping while walking. Simulation studies demonstrated that older adults may be restricted by lower limb strength and movement speed to regain balance after a trip. This review examines how modeling approaches can be used to determine how different m...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2013.07.001
更新日期：2013-10-01 00:00:00
abstract：:This paper presents empirical evidence suggesting that healthy humans can perform a two degree of freedom visuo-motor pursuit tracking task with the same response time delay as a one degree of freedom task. In contrast, the time delay of the response is influenced markedly by the nature of the motor synergy required t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2005.10.003
更新日期：2005-10-01 00:00:00
abstract：:Meeting the challenge of assembling coherent organizations of very many muscles characterizes a functional level of biological movement systems referred to as the level of muscular-articular links or synergies. The present article examines the issues confronting the forming, regulating, and ordering of synergies and t...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2007.04.002
更新日期：2007-08-01 00:00:00
abstract：:This study examined at what age children can engage in the hand rotation task (as a measure of motor imagery); whether engagement changes across development and; the influence of age and motor skill on performance. Children were aged 5-12 years (N=101; 52 girls), with no IQ or motor skill impairment. Less than 40% of ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.03.013
更新日期：2014-06-01 00:00:00
abstract：:Recently there has been much interest in social coordination of motor movements, or as it is referred to by some researchers, joint action. This paper reviews the cognitive perspective's common coding/mirror neuron theory of joint action, describes some of its limitations and then presents the behavioral dynamics pers...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2010.05.014
更新日期：2011-10-01 00:00:00
abstract：:An experiment was designed to determine if the addition of a load altered the effector transfer profile observed in earlier experiments using multi-element movement sequences. The acquisition task required participants to move a horizontal lever (with 0.567kg load) to 16 sequentially projected targets. One group pract...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2009.08.001
更新日期：2010-02-01 00:00:00
abstract：:This experiment assessed the influence of internal (movement) or external (outcome) attentional focusing instructions on force production and muscular activity at different movement speeds. Twenty five participants completed 10 reps of single arm elbow flexions on an isokinetic dynamometer at speeds of 60°, 180° and 3...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2013.08.008
更新日期：2014-02-01 00:00:00
abstract：:This experiment investigated the relationship between motivation, engagement, and learning in a video game task. Previous studies have shown increased autonomy during practice leads to superior retention of motor skills, but it is not clear why this benefit occurs. Some studies suggest this benefit arises from increas...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.08.005
更新日期：2016-10-01 00:00:00
abstract：:In a bipedal walk, the human body experiences continuous changes in stability especially during weight loading and unloading transitions which are reported crucial to avoid fall. Prior stability assessment methods are unclear to quantify stabilities during these gait transitions due to methodological and/or measuremen...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.102558
更新日期：2020-02-01 00:00:00
abstract：:Allowing learners to control the video presentation of knowledge of performance (KP) or an expert model during practice has been shown to facilitate motor learning (Aiken, Fairbrother, & Post, 2012; Wulf, Raupach, & Pfeiffer, 2005). Split-screen replay features now allow for the simultaneous presentation of these mode...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.01.014
更新日期：2016-06-01 00:00:00
abstract：:Patients with rotator cuff tear and degenerative shoulder joint disease commonly experience severe pain and reduced performance during activities of daily living. A popular way to treat these patients is by means of reverse anatomy shoulder prosthesis. Studying the kinematics of subjects with reverse anatomy implant w...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.08.014
更新日期：2011-12-01 00:00:00
abstract：:This research addresses the question: what is the risk of fall initiation at a certain human posture? There are postures from which no one is able to keep their balance and a fall will surely initiate (risk=1), and others from which everyone may regain their stability (risk=0). In other postures, only a portion of peo...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2012.11.009
更新日期：2013-10-01 00:00:00
abstract：:Previous studies have found that rates of attention deficit hyperactivity disorder (ADHD) and developmental coordination disorder (DCD) are very similar, both being approximately 7% in sample populations [Kadesjö, B., & Gillberg, C. (1999). Developmental coordination disorder in Swedish 7-year-old children. Journal of...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2005.10.006
更新日期：2006-02-01 00:00:00
abstract：:Movements of the lumbar spine and hips were measured in 20 healthy subjects using an electromagnetic tracking device. Movement sensors were attached to the L1 spinous process, the sacrum and the thighs. Each subject was requested to perform the following movements of the trunk: forward and backward bending, lateral be...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/s0167-9457(02)00117-3
更新日期：2002-10-01 00:00:00
