Biomechanical analysis of the different classifications of the Functional Movement Screen deep squat test     

Butler RJ  Plisky PJ  Southers C  Scoma C  Kiesel KB 《Sports biomechanics / International Society of Biomechanics in Sports》2010,9(4):270-279

The purpose of this study is to examine the peak sagittal plane joint angles and joint moments of the lower extremity during the deep squat (DS) movement of the Functional Movement Screen (FMS) to assess differences between the classifications (1,2,3). Twenty-eight participants volunteered for the study and were screened to assess their FMS score on the DS task. All participants underwent a quantitative movement analysis performing the FMS DS movement at a self-selected speed. The participants in Group 3 exhibited greater dorsiflexion excursion compared to those in Group 1. Participants in Group 3 had greater peak knee flexion and knee flexion excursion than those in Group 2 who exhibited more than the participants in Group 1. Group 3 also exhibited a greater peak knee extension moment compared to Group 1. At the hip, Groups 3 and 2 exhibited greater peak hip flexion, hip flexion excursion and peak hip extension moment compared to Group 1. Thus, it appears that individuals who score differently on the deep squat as determined by the FMS exhibit differences in mechanics that may be beneficial in assessing strategies for interventions. Future research should assess how fundamental changes in mobility and stability independently affect DS performance.  相似文献   

A Decade of 21st-Century Dinosaur Research at IVPP     

Corwin Sullivan 《中国科学院院刊(英文版)》2010,24(2):89-91

<正>In the first decade of the 21st century, a larger number of important new dinosaur specimens have come from China than from any other country. The Institute  相似文献   

A Comparative Study of Electronic Performance Support Systems     

Frank Nguyen  James D. Klein  Howard Sullivan 《Performance Improvement Quarterly》2005,18(4):71-86

ABSTRACT Electronic performance support systems (EPSS) deliver relevant support information to users while they are performing tasks. The present study examined the effect of different types of EPSS on user performance, attitudes, system use and time on task. Employees at a manufacturing company were asked to complete a procedural software task and received support from either an intrinsic, extrinsic, external performance support system or no system at all. Results revealed significant differences on performance, attitudes and use between several treatment groups. The study suggests that providing any kind of EPSS to support task performance is better than having none at all. In addition, designers can improve user performance, attitudes and use by creating systems that integrate with the primary work interface.  相似文献   

Spatial assimilation effects and error detection in rapid overlapping and sequential bimanual movements.     

D E Sherwood  A Sullivan 《Research quarterly for exercise and sport》1999,70(3):252-264

This study verified earlier anecdotal evidence indicating that spatial assimilations could be reduced by offsetting movements in time. In Experiment 1, 40 right-handed participants (ages 18-23 years) made single and dual quick lever reversals of 20 degrees and 60 degrees with the left and right limbs, respectively. Participants were assigned to either the Overlapping (O) group, in which one limb began when the other limb reached the reversal point, or to the Sequential (S) group in which one limb followed the other with a delay of 114 ms, on average. The shorter-distance limb of the O group overshot relative to the S group. Short-distance spatial assimilations were also shown in the S group in Experiment 2, when the delay was increased to 250, 500, or 1,500 ms (N = 30), suggesting that assimilation effects can be caused by command interactions at both the planning and the execution levels.  相似文献   

Editorial: What are the implications of shifting the focus of education from teaching to access,equity, learning,and technology?     

William C. Kyle   《科学教学研究杂志》1997,34(8):769-771

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Valuing scholarship's essential paradigmatic differences and inherent contradictions: A rejoinder to Wallace and Louden     

William C. Kyle  Stephen M. Caliendo 《科学教学研究杂志》1997,34(4):323-325

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Untracking science education     

William C. Kyle 《科学教学研究杂志》1998,35(10):1065-1067

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Kinematic and kinetic differences between left-and right-handed professional baseball pitchers     

Alek Z. Diffendaffer  Glenn S. Fleisig  Brett Ivey  Kyle T. Aune 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(4):448-455

While 10% of the general population is left-handed, 27% of professional baseball pitchers are left-handed. Biomechanical differences between left- and right-handed college pitchers have been previously reported, but these differences have yet to be examined at the professional level. Therefore, the purpose of this study was to compare pitching biomechanics between left- and right-handed professional pitchers. It was hypothesised that there would be significant kinematic and kinetic differences between these two groups. Pitching biomechanics were collected on 96 left-handed pitchers and a group of 96 right-handed pitchers matched for age, height, mass and ball velocity. Student t-tests were used to identify kinematic and kinetic differences (p < 0.05). Of the 31 variables tested, only four were found to be significantly different between the groups. Landing position of the stride foot, trunk separation at foot contact, maximum shoulder external rotation and trunk forward tilt at ball release were all significantly greater in right-handed pitchers. The magnitude of the statistical differences found were small and not consistent with differences in the two previous, smaller studies. Thus, the differences found may be of minimal practical significance and mechanics can be taught the same to all pitchers, regardless of throwing hand.  相似文献   

Only experienced estimators need apply     

Roseann Mikos  Robert J. Casey  Dennis J. Sullivan  Jeanne M. Hebein 《Performance Improvement》1988,27(2):56-60

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Formative Evaluation of Computer‐Based Training For a University Financial System     

Kathryn M. Fischer  Wilhelmina C. Savenye  Howard J. Sullivan 《Performance Improvement Quarterly》2002,15(1):11-24

This article describes a formative evaluation of a one‐day introductory computer‐based training (CBT) course for a new on‐line financial and purchasing system at a large public university. The purposes of the evaluation were to evaluate the effectiveness of the training and to identify appropriate revisions and incorporate them into the training program. Participants were 78 university employees who were likely future users of the financial and purchasing system. The mean score on an on‐line performance posttest that simulated real‐work tasks was 94%, and the mean on a 40‐item knowledge posttest covering the CBT content was 74%. Learner attitudes toward the course were positive, averaging 4.4 on a 5‐point scale. Formative evaluation of the program resulted in revisions that had the potential to improve its effectiveness and provided evidence of the value of ongoing formative evaluation of workplace training.  相似文献