Abstract:
:Anterior cruciate ligament (ACL) rupture, during ski-landing, is caused by excessive knee joint forces and kinematics, like anterior tibial translation, internal tibial rotation, and valgus rotation. It is not well understood how these forces/kinematics are directly related to ski-landing impact. In the present study, we applied simulated ski-landing impact to knee specimens, and examined joint force/kinematic responses and their correlations with impact force. Ten human cadaveric knees were subjected to axial impact loading at 70° of flexion to simulate ski-landing impact. Impact was repeated with incremental magnitude until ACL failure. Axial impact forces, anterior-posterior and medial-lateral tibial forces were measured using a tri-axial load cell. Anterior-posterior tibial translation, internal-external tibial rotation, and valgus-varus rotation were determined using a motion-capture system. We found positive correlations of axial impact force with anterior tibial force, medial tibial force, anterior tibial translation, internal tibial rotation, and valgus joint rotation. Axial impact forces were more strongly correlated with anterior tibial forces (R(2) = 0.937 ± 0.050), anterior tibial translation (R(2) = 0.916 ± 0.059), and internal tibial rotation (R(2) = 0.831 ± 0.141) than medial tibial force (R(2) = 0.677 ± 0.193) and valgus joint rotation (R(2) = 0.630+0.271). During ski-landing, these joint forces/kinematics can synergistically act to increase ACL injury risk, whereby the failure mechanism would be dominated by anterior tibial forces, anterior tibial translation, and internal tibial rotation.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Yeow CH,Kong CY,Lee PV,Goh JCdoi
10.1080/02640414.2011.578146subject
Has Abstractpub_date
2011-08-01 00:00:00pages
1143-51issue
11eissn
0264-0414issn
1466-447Xjournal_volume
29pub_type
临床试验,杂志文章abstract::We explore how expertise is obtained in the domain of rugby refereeing. The research data are qualitative and are drawn from an 18 month period working in collaboration with the Rugby Football Union Elite Referee Unit. Adopting an ethnographic mode of enquiry, the study combined long-term participant observation with ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/17461390500188710
更新日期:2006-03-01 00:00:00
abstract::The aim of this study was to determine the effects of frequency of verbal encouragement during maximal exercise testing. Twenty-eight participants (12 males, 16 females) aged 20.9 +/- 1.5 years (mean +/- s) performed a maximal exercise test (VO2max) on a treadmill without any verbal encouragement. The participants wer...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404102753576125
更新日期:2002-04-01 00:00:00
abstract::The aim of this study was to determine whether endurance training in athletes induces airway inflammation and pulmonary function disorders. Respiratory pattern and function were analysed in ten healthy endurance runners at rest, during sub-maximal exercise, and during the recovery. Inflammatory cells and metabolites (...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802123177
更新日期:2008-10-01 00:00:00
abstract::Adherence is a key implementation outcome that determines the effectiveness of an intervention. This study, an observational design involving coaches and players from 33 high school basketball teams, evaluated the dimensions of adherence to a basketball-specific neuromuscular training (NMT) warm-up program in youth ba...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1782578
更新日期:2020-10-01 00:00:00
abstract:INTRODUCTION:High-Intensity Interval Training (HIIT) and Constant-Intensity Endurance Training (CIET) improves peak oxygen uptake (V̇O2) similarly in adults; but in children this remains unclear, as does the influence of maturity. METHODS:Thirty-seven boys formed three groups: HIIT (football; n = 14; 14.3 ± 3.1 years)...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1644890
更新日期:2019-11-01 00:00:00
abstract::Dual energy X-ray absorptiometry (DXA) cannot be used to evaluate participants taller than the scan area. We aimed to analyse the accuracy of bone mineral content, fat mass, and lean mass assessed with DXA whole-body scan and from the sum of two scans (head and trunk plus limbs). Participants were 31 athletes (13 male...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.734918
更新日期:2013-01-01 00:00:00
abstract::The time-course of physical recovery was determined after a 2-h 20-min, simulated cricket batting innings. Several vertical jump measures were assessed before (baseline), immediately after, 24 h after and 48 h after simulated batting. Six, male, academy cricketers (20 ± 2 years) completed a previously developed simula...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.687113
更新日期:2012-01-01 00:00:00
abstract::Training and nutrition are highly interrelated in that optimal adaptation to the demands of repeated training sessions typically requires a diet that can sustain muscle energy reserves. As nutrient stores (i.e. muscle and liver glycogen) play a predominant role in the performance of prolonged, intense, intermittent ex...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640410500482727
更新日期:2006-07-01 00:00:00
abstract::An analysis system for barbell weightlifting exercises is proposed to record reliable performance and neuromuscular responses. The system consists of surface electromyography (sEMG) synchronized with electrogoniometry and a barbell position transducer. The purpose of this study was to establish the reliability of the ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2011.588956
更新日期:2011-10-01 00:00:00
abstract::In this study, we examined gender and age differences in physical performance in football. Thirty-four elite female and 34 elite male players (age 17 +/- 1.6 to 24 +/- 3.4 years) from a professional football club were divided into four groups (n=17 each) according to gender and competitive level (senior males, senior ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802428071
更新日期:2009-01-15 00:00:00
abstract::In the present study, we examined the influence of shoe lacing on foot biomechanics in running. Twenty experienced rearfoot runners ran in six different lacing conditions across a force platform at a speed of 3.3 m . s(-1). Foot pronation during contact, tibial acceleration, and plantar pressure distribution of the ri...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802482425
更新日期:2009-02-01 00:00:00
abstract::The aim of this study was to examine the effect of movement and stretching imagery on increases in flexibility. Thirty volunteers took part in a 4 week flexibility training programme. They were randomly assigned to one of three groups: (1) movement imagery, where participants imagined moving the limb they were stretch...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640410500131811
更新日期:2006-02-01 00:00:00
abstract::An important goal of the athlete's everyday diet is to provide the muscle with substrates to fuel the training programme that will achieve optimal adaptation for performance enhancements. In reviewing the scientific literature on post-exercise glycogen storage since 1991, the following guidelines for the training diet...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/0264041031000140527
更新日期:2004-01-01 00:00:00
abstract::The purpose of this study was to determine the effects of training on the force-, velocity-, and displacement-time curves using principal component analysis (PCA) to examine the pre to post intervention changes. Thirty-four trained women basketball players were randomly divided into training and control groups. The tr...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2018.1504602
更新日期:2019-02-01 00:00:00
abstract::We aimed to assess the cardiovascular responses and locomotory demands of male referees during diverse elite, international, basketball matches, and to investigate the influence of moderating factors (competition sex, level and stage) on these demands. Cardiovascular and locomotory responses were monitored in 123 elit...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1851902
更新日期:2020-11-25 00:00:00
abstract::This study aimed to compare the load-velocity and load-power relationships of three common variations of the squat exercise. 52 strength-trained males performed a progressive loading test up to the one-repetition maximum (1RM) in the full (F-SQ), parallel (P-SQ) and half (H-SQ) squat, conducted in random order on sepa...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1544187
更新日期:2019-05-01 00:00:00
abstract::Assessments of maximal intensity exercise which determine peak power output on friction-baked cycle ergometers have fallen into two categories: correction procedures which account for changes in momentum of the ergometer's flywheel and optimization procedures which attempt to satisfy muscle force-velocity relationship...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/02640419608727738
更新日期:1996-12-01 00:00:00
abstract::This study examined the validity of the Actical accelerometer step count and energy expenditure (EE) functions in healthy young adults. Forty-three participants participated in study 1. Actical step counts were compared to actual steps taken during a 200 m walk around an indoor track at self-selected pace and during t...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2014.964747
更新日期:2015-01-01 00:00:00
abstract::In this study, we examined patterns of leg muscle recruitment and co-activation, and the relationship between muscle recruitment and cadence, in highly trained cyclists. Electromyographic (EMG) activity of the tibialis anterior, tibialis posterior, peroneus longus, gastrocnemius lateralis and soleus was recorded using...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410500131159
更新日期:2006-02-01 00:00:00
abstract::The study examined Yo-Yo intermittent recovery level 2 (YYIR2) and submaximal YYIR1 test performances in 172 male semi-professional football players (age; 25.8 ± 4.1 years) representing all teams in a top league at pre-season, start-season, mid-season and end-season. YYIR2 performance was 847 ± 227 m (±SD) at pre-seas...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2013.824598
更新日期:2014-01-01 00:00:00
abstract::We aimed to compare multilayer perceptron (MLP) neural networks, radial basis function neural networks (RBF) and linear models (LM) accuracy to predict the centre of mass (CM) horizontal speed at low-moderate, heavy and severe swimming intensities using physiological and biomechanical dataset. Ten trained male swimmer...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1574949
更新日期:2019-07-01 00:00:00
abstract::Comprehension of a narrated diagram entail complex cognitive processing as learner is challenged to extract the orally evoked information. The present experiment examined the effects of 2 different forms of attention guidance - bottom-up and top-down - on comprehension performance, cognitive load investment, and motiv...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1218034
更新日期:2017-06-01 00:00:00
abstract::The present study examined the metabolic responses to an acute bout of football and the overall and moderating role of physical fitness on these responses, in adolescents. Thirty-six adolescents (16 girls, 20 boys; 12.6±0.5 y) completed two trials (60-min football and 60-min seated rest) separated by 7-d. Capillary bl...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1860362
更新日期:2021-01-11 00:00:00
abstract::The aims of this study were to examine the changes in plasma concentrations of inflammatory cytokines induced by training and competition in professional cyclists. We report the serum concentrations of interleukin-6 (IL-6), tumour necrosis factor alpha (TNF-a), tumour necrosis factor receptors I and II (TNFR-I and -II...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640410500141158
更新日期:2006-06-01 00:00:00
abstract::The aim of this study was to assess the effects of quality of opposition and match status on technical and tactical volleyball performances, as measured by block, attack, serve, and set actions related to the tasks, space, players, and efficacy of selected game actions. Twenty-five matches from the men's World Cup 200...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2011.552516
更新日期:2011-04-01 00:00:00
abstract::In two retroactive interference experiments, we assessed the effect of mentally imagined movement speed on subsequent motor performance. All participants performed a sequential motor action at three speeds during a baseline test and a retention test. During the retention interval of Experiment 1, the participants (n =...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/02640410050082305
更新日期:2000-08-01 00:00:00
abstract::We tested a hypothetical model that examined both the effects of implicit theories of ability on the judgement of cheating acceptability in a physical education context and the mediating role of the achievement goals defined in the social-cognitive model of achievement motivation. Data were collected from 477 middle-s...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2010.484065
更新日期:2010-06-01 00:00:00
abstract::The aim of this study was to integrate both dispositional and situational factors to examine their interactive ability to predict pre-competitive goal states of task and ego involvement in a sample of National junior tennis players. The Task and Ego Orientation in Sport Questionnaire (Chi and Duda, 1995) and a set of ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640419808559364
更新日期:1998-05-01 00:00:00
abstract::Although it has been generally assumed that the risk of decompression sickness is virtually zero during a single breath-hold dive in humans, repeated dives may result in a cumulative increase in the tissue and blood nitrogen tension. Many species of marine mammals perform extensive foraging bouts with deep and long di...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640410903121351
更新日期:2009-12-01 00:00:00
abstract::The aim of this study was to examine the effect of an enrichment programme in motor, technical and tactical basketball skills, when accounting for the age of youth sport specialisation. Seventy-six college students (age: M = 20.4, SD = 1.9) were allocated according to three different paths: (i) non-structured (n = 14)...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2016.1236206
更新日期:2017-09-01 00:00:00