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Isabelle Rogowski Thomas Creveaux Laurence Chèze Raphaël Dumas 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(2):166-175
Scapular dyskinesis is recognized as an abnormality in the kinetic chain; yet, there has been little research quantifying scapular motion during sport tasks. Tennis forehand drives of eight highly skilled tennis players were studied to assess the scapulothoracic kinematics and evaluate repeatability using video-based motion analysis. Scapulothoracic downward/upward rotation, posterior/anterior tilt, and internal/external rotation were computed using an acromial marker cluster. On average, the upward rotation, anterior tilt, and internal rotation varied from 1° to 26°, from 7° to 32°, and from 42° to 100°, respectively, during the tennis forehand drive. During the backswing and forward swing phases of the forehand stroke, small changes were observed for the three scapular angle values, while all angles increased rapidly during the follow-through phase. This suggests that the tennis forehand drive may contribute to scapula dyskinesis, mainly due to the great amplitude in scapulothoracic anterior tilt and internal rotation observed during the follow-through phase. Knowledge of normal scapula motion during sport tasks performed at high velocity could improve the understanding of various sport-specific adaptations and pathologies. 相似文献
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Paul Trent Richard Lawton Laurence Kardish David Manning White Richard Averson Edward Mapp 《Communication Booknotes Quarterly》2013,44(2):2-4
Paul Trent and Richard Lawton's The Image Makers: Sixty Years of Hollywood Glamour (New York: McGraw-Hill, 1972—$20.00, but $16.95 before January 1, 1977) Laurence Kardish's Reel Plastic Magic: A History of Films and Filmmaking in America (Boston: Little, Brown, 1972—$7.50) David Manning White and Richard Averson's The Celluloid Weapon: Social Comment in the American Film (Boston: Beacon Press, 1972—$14.95) Edward Mapp's Blacks in American Films: Today and Yesterday (Metuchen, N.J.: Scarecrow Press, 1972—$7.50) Charles Higham's Hollywood at Sunset (New York: Saturday Review Press, 1972—$6.95) Jean Narbonl and Tom Milne (eds), Godard on Godard: Critical Writings by Jean-Luc Godard (New York: Viking Press, 1972—$10.00) Kenneth H. Roberts and Win Sharples, Jr. A Primer for Film-Making: A Complete Guide to 16 and 35 mm. Film Prodution (New York: Pegasus/Bobbs-Merrill, $15.00/6.95) Stephen Farber's The Movie Rating Game (Washington, D.C.: Public Affairs Press, 1972—$4.50) 相似文献
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Laurence Houghton Brian Dawson Jonas Rubenson Martin Tobin 《Journal of sports sciences》2013,31(8):801-809
Abstract A simulated cricket batting innings was developed to replicate the physical demands of scoring a century during One-Day International cricket. The simulated innings requires running-between-the-wickets across six 5-over stages, each of 21 min duration. To validate whether the simulated batting innings is reflective of One-Day International batting, movement patterns were collected using a global positioning system (GPS) and compared with previous research. In addition, indicators of physical strain were recorded (heart rate, jump heights, sweat loss, tympanic temperature). Nine club cricketers (mean ± s: age 20 ± 3 years; body mass 79.5 ± 7.9 kg) performed the simulated innings outdoors. There was a moderate trend for distance covered in the simulated innings to be less than that during One-Day batting (2171 ± 157 vs. 2476 ± 631 m · h?1; effect size = 0.78). This difference was largely explained by a strong trend for less distance covered walking in the simulated innings than in One-Day batting (1359 ± 157 vs. 1604 ± 438 m · h?1; effect size = 1.61). However, there was a marked trend for distance covered both striding and sprinting to be greater in the simulated innings than in One-Day batting (effect size > 1.2). Practically, the simulated batting innings may be used for match-realistic physical training and as a research protocol to assess the demands of prolonged, high-intensity cricket batting. 相似文献
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Laurence Chalip Mihaly Csikszentmihalyi Douglas Kleiber Reed Larson 《Research quarterly for exercise and sport》2013,84(2):109-116
Abstract The premise of this paper is that an important component of the value of sport is the experience it provides: the moods, feelings, and self-perceptions that occur in sports contexts. The Experience Sampling Method (ESM) was used to monitor the ongoing experience of 75 adolescents. Sport was compared with other activities in terms of concentration, mood, self-consciousness and sense of skill, challenge and control. Three different sport contexts were distinguished and compared—organized sport, informal sport, and physical education class. These three contexts were contrasted, and results interpreted in terms of the “flow model” of enjoyment and optimal experience (Csikszentmihalyi, 1975). Sport was experienced as substantially more positive than the rest of everyday life. Sense of control was highest in gym class and lowest in informal sport; sense of skill was highest in informal sport and lowest in gym class; and significantly more was perceived to be at stake in organized sport than in informal sport or gym class. Finally it was shown how the structure of the activity impacts the relationship between sense of skill and other subjective variables. 相似文献