Chronic flexibility gains: effect of isometric contraction duration during proprioceptive neuromuscular facilitation stretching techniques     

Rowlands AV  Marginson VF  Lee J 《Research quarterly for exercise and sport》2003,74(1):47-51

The aim of this study was to assess the effect of to isometic contraction durations during propiceptive neuromuscular facilitation stretching on gains inflexion at the hip. Forty-three women (M age = 20.0 years, SD = 1.3) were assigned to one of three groups: 5-s isometric contraction (5-IC), 10-IC, and control. Flexibility was assessed at baseline and Weeks 3 and 6. Analysis of covariance, controlling for pretest differences, showed a significant interaction, F(2, 33) = 44.1, p < .001. Flexibility was significant lower in the control group relative to the 5-IC and 10-IC groups and in the 5-IC group relative to the 10-IC group at 3 and 6 weeks (3 weeks = 101.2 +/- 1.4 degrees, 114.3 +/- 1.5 degrees, 120.5 +/- 1.3 degrees; 6 weeks = 103.0 +/- 1.4 degrees, 126.1 +/- 1.6 degrees, 133.3 +/- 1.4 degrees for control, 5-IC and 10-IC groups, respectively). A longer contraction time led to greater increases in flexibility.  相似文献   

Book Reviews     

Olivia Remie Constable  Eleanor A. Congdon  Andrew J. Lane  Sharon E. J. Gerstel  Ann Chamberlin  G.A. Loud 《Al-Masaq: Islam & the Medieval Mediterranean》2007,19(2):199-215

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Prolonged static stretching does not influence running economy despite changes in neuromuscular function     

Allison SJ  Bailey DM  Folland JP 《Journal of sports sciences》2008,26(14):1489-1495

The aim of this study was to examine the acute effects of prolonged static stretching (SS) on running economy. Ten male runners (VO2(peak) 60.1 +/- 7.3 ml x kg(-1) x min(-1)) performed 10 min of treadmill running at 70% VO2(peak) before and after SS and no stretching interventions. For the stretching intervention, each leg was stretched unilaterally for 40 s with each of eight different exercises and this was repeated three times. Respiratory gas exchange was measured throughout the running exercise with an automated gas analysis system. On a separate day, participants were tested for sit and reach range of motion, isometric strength and countermovement jump height before and after SS. The oxygen uptake, minute ventilation, energy expenditure, respiratory exchange ratio and heart rate responses to running were unaffected by the stretching intervention. This was despite a significant effect of SS on neuromuscular function (sit and reach range of motion, +2.7 +/- 0.6 cm; isometric strength, -5.6% +/- 3.4%; countermovement jump height -5.5% +/- 3.4%; all P < 0.05). The results suggest that prolonged SS does not influence running economy despite changes in neuromuscular function.  相似文献   

Feedback complexity and corrective efficiency     

Raymond W. Kulhavy  Mary T. White  Bruce W. Topp  Ann L. Chan  James Adams 《Contemporary educational psychology》1985,10(3):285-291

College undergraduates read a 2400-word passage, responded to 16 multiple-choice questions, and received one of four types of feedback following their responses. Complexity of feedback was inversely related to both error correctability and criterion efficiency taken as a ratio of feedback study time to post-test corrects. The results were discussed in terms of depth of processing and instructional comprehension.  相似文献   

Children's experiences of fun and enjoyment during a season of sport education     

MacPhail A  Gorely T  Kirk D  Kinchin G 《Research quarterly for exercise and sport》2008,79(3):344-355

This paper reports on a 16-week sport education (SE) unit with just over 70 year 5 students (M age = 10.04 years) in one United Kingdom school during the spring and summer terms and discusses students' SE experiences. Student interviews were conducted throughout the season and a questionnaire on different motivation aspects was administered prior to and before completing the SE season. We report and examine the data in relation to hypothesized influences on fun and enjoyment, including being part of a team, autonomy, and improving game play. The principal reasons SE may be more enjoyable than previous physical education lessons include the greater opportunities for autonomy, affiliation, and competition, plus perceived learning.  相似文献   

The production and conservation of fats and oils in the United States     

H.S. Bailey 《Journal of The Franklin Institute》1919,187(3):364

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Editorial: NATE the Sum of its Parts     

Ann Shreeve 《English in Education》1998,32(2):1-3

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Mozarabs in Medieval and Early Modern Spain. Identities and Influences     

Ann Christys 《Al-Masaq: Islam & the Medieval Mediterranean》2009,21(3):336-338

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Editorial     

Ann Shreeve 《English in Education》1990,24(3):1-2

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Effects of “Meaningful” Entertainment on Altruistic Behavior: Investigating Potential Mediators     

Erica Bailey  Bartosz W. Wojdynski 《广播与电子媒介杂志》2015,59(4):603-619

Recent research has shown that exposure to entertainment media depicting moral beauty may not only influence viewers' affective responses, but also lead to altruistic behavior. Although the process has been tied to a set of feelings commonly referred to as elevation, the mechanisms by which the effects take place have not been examined. This experiment (N = 107) showed that participants who watched a clip portraying moral beauty were more likely to help with an unrelated volunteer task after viewing than those who watched a non-meaningful clip. The effect of the clip was mediated by the degree to which the clip produced mixed affective response in participants. Although the clip portraying moral beauty led to increased empathy with the character and increased feelings of elevation, neither of these predicted helping behavior after controlling for clip content. Helping behavior also increased when the help recipient was less similar to the participants (age, race, and university affiliation).  相似文献