体育运动领域流畅状态的研究进展

流畅状态是一种理想的内部体验状态,在体育运动领域也被称之为个体从事活动的最佳体验.由于其可以为个体提供良好的心境状态,有助于促进个体对活动的内部动机,提高个体的活动效率,所以,流畅状态作为一个重要的研究领域在运动心理学的发展过程中发挥着重要的作用.拟对体育运动情境中流畅状态的心理特征、模型构建及研究方法进行详细的阐述;并对相关的研究成果加以评述,如流畅状态的跨文化普遍性,体育运动中流畅体验的倾向性差异,流畅一运动技能表现间的关系,影响流畅状态的因素及其相应的调控措施.在此基础上提出,本领域的未来发展应拓展对流畅状态心理特征的研究,即以那些处于非西方文化和西方文化中少数民族文化背景下的群体作为研究对象,进行不同背景的跨文化对比研究;同时,对流畅模型的进一步改进,以充实流畅状态的理论架构,也应成为未来研究的一个焦点;此外,通过目标设置等心理干预手段以促进运动员流畅状态的发生,以及为流畅状态与运动技能建立明确的中介模型,从而应用于运动技能提升的实践情境中也将是未来研究的新主题.     

Decision boundaries and receiver operating characteristic curves: new methods for determining accelerometer cutpoints

We propose and evaluate the utility of an alternative method (decision boundaries) for establishing physical activity intensity-related accelerometer cutpoints. Accelerometer data collected from seventy-six 11- to 14-year-old boys during controlled bouts of moderate- and vigorous-intensity field physical activities were assessed. Mean values and standard deviations for moderate- and vigorous-intensity activities were obtained and normal equivalents generated. The decision boundary (the point of intersection of overlapping distributions) was used to create a lower-bound vigorous-intensity cutpoint. Receiver operating characteristic (ROC) curves compared the sensitivity and specificity of the new cutpoint and mean values with the actual activity. There was a 96.5% probability that participants performing vigorous-intensity physical activity were accurately classified when using the decision boundary of 6700 counts per minute, in contrast to the 50% accurately classified when the mean value was used. Inspection of the empirical ROC curve indicated that the decision boundary provided the optimal threshold to distinguish between moderate and vigorous physical activity for this dataset. In conclusion, decision boundaries reduced the error associated with determining accelerometer threshold values. Applying these methods to accelerometer data collected in specific populations will improve the precision with which accelerometer thresholds can be identified.     

The brain and fatigue: new opportunities for nutritional interventions?

It is clear that the cause of fatigue is complex, influenced by events occurring in both the periphery and the central nervous system. Work conducted over the last 20 years has focused on the role of brain serotonin and catecholamines in the development of fatigue, and the possibility that manipulation of neurotransmitter precursors may delay the onset of fatigue. While there is some evidence that branched-chain amino acid and tyrosine ingestion can influence perceived exertion and some measures of mental performance, the results of several apparently well-controlled laboratory studies have not demonstrated a positive effect on exercise capacity or performance under temperate conditions. As football is highly reliant upon the successful execution of motor skills and tactics, the possibility that amino acid ingestion may help to attenuate a loss in cognitive function during the later stages of a game would be desirable, even in the absence of no apparent benefit to physical performance. There are several reports of enhanced performance of high-intensity intermittent exercise with carbohydrate ingestion, but at present it is difficult to separate the peripheral effects from any potential impact on the central nervous system. The possibility that changes in central neurotransmission play a role in the aetiology of fatigue when exercise is performed in high ambient temperatures has recently been examined, although the significance of this in relation to the pattern of activity associated with football has yet to be determined.     

HPT in Academic Curricula: Survey Results

The purpose of this research was to determine to what extent human performance technology (HPT) is being taught in academic programs that traditionally emphasized training—programs such as instructional systems, training and development, human resource development, and adult learning. A written survey was used to collect data from 82 academic programs. Results indicate that while training (and the related areas of needs assessment and evaluation) continues to dominate curricula at these institutions, non-training performance improvement strategies (and the broader performance analysis that leads to their selection) are frequently taught as well. No correlations were found between the extent of teaching HPT topics and the variables of program size, program type, location, degrees offered, or faculty membership in NSPI (now called the International Society for Performance Improvement). Future research could investigate the driving and restraining forces that determine HPT's impact on the curriculum and the effects that current curricula have on program graduates.