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71.
Scott B. Martin Allen W. Jackson Peggy A. Richardson Karen H. Weiller 《Journal of Applied Sport Psychology》2013,25(2):247-262
Abstract This study compared preferred coaching styles of children and their parents using the Leadership Scale for Sport (LSS; Chelladurai & Saleh, 1980). The LSS preferred form was revised and then administered to children ranging from 10 to 18 years of age who competed in summer youth sport leagues and to one parent within each family unit (n = 239). A doubly multivariate repeated measure MANOVA revealed a significant multivariate difference for adolescent athletes and their parents on the five subscales of the LSS. Discriminant function and univariate analyses indicated that male and female children and their parents differed on autocratic and democratic behavior and children had a significantly higher score on democratic behavior and social support than did their parents. Parents, coaches, and researchers in youth sports could use the revised LSS to determine children-athletes’ preferences for coaching styles and for developing more effective programs. 相似文献
72.
A comparison of mental illness and narcotic use in rural and urban areas indicates a greater incidence in areas with high population density. A hypothesis explored is that prior experiences condition some to be sanguine and others melancholic. Whereas both are vulnerable to stress, the reactions to signals indicating punishment will vary according to the conditioned temperament. The great frequency of signals in high population density areas activates a general stress reaction. Relief can be obtained for the melancholic by withdrawal, whereas for the sanguine it is by the use of drugs. 相似文献
73.
Sensory Integration and Response to Balance Perturbation in Overweight Physically Active Individuals
The purpose of this study was to compare sensory integration and response to balance perturbation between physically active normal weight and overweight adults. Physically active young adults were grouped into normal weight (n = 45) or overweight (n = 17) according to the World Health Organization body mass index classification for Asian adults. Participants underwent two balance tests: sensory organization and motor control. Overweight participants presented marginally lower somatosensory score compared to normal weight participants. However, they scored significantly higher in response to balance perturbation. There was no difference in the onset of participants' active response to balance perturbation. Physical activity might have contributed to improved muscle strength and improved the ability of overweight individuals to maintain balance. 相似文献
74.
Peggy L. St. Jacques Philip A. Kragel David C. Rubin 《Cognitive, affective & behavioral neuroscience》2013,13(3):554-566
Posttraumatic stress disorder (PTSD) affects the functional recruitment and connectivity between neural regions during autobiographical memory (AM) retrieval that overlap with default and control networks. Whether such univariate changes relate to potential differences in the contributions of the large-scale neural networks supporting cognition in PTSD is unknown. In the present functional MRI study, we employed independent-component analysis to examine the influence of the engagement of neural networks during the recall of personal memories in a PTSD group (15 participants) as compared to non-trauma-exposed healthy controls (14 participants). We found that the PTSD group recruited similar neural networks when compared to the controls during AM recall, including default-network subsystems and control networks, but group differences emerged in the spatial and temporal characteristics of these networks. First, we found spatial differences in the contributions of the anterior and posterior midline across the networks, and of the amygdala in particular, for the medial temporal subsystem of the default network. Second, we found temporal differences within the medial prefrontal subsystem of the default network, with less temporal coupling of this network during AM retrieval in PTSD relative to controls. These findings suggest that the spatial and temporal characteristics of the default and control networks potentially differ in a PTSD group versus healthy controls and contribute to altered recall of personal memory. 相似文献
75.
Shuang Bi Eric A. Haak Lauren R. Gilbert Peggy S. Keller 《Journal of child and family studies》2017,26(11):3112-3122
Disordered eating in children is a major public health concern, as it is precursor to clinical eating disorders and obesity. However, little is known about the potential causes of child disordered eating. The current study examined marital conflict as a predictor of disordered eating in a sample of children aged 5–12 years, from the perspective of emotional security theory. Ninety five children and their parents in the Southeast United States participated in the study. We found that marital conflict was associated with higher levels of restrained eating, emotional eating and external eating behaviors controlling for demographics and parental feeding practices. Further, we examined the possible pathways between marital conflict and child disordered eating and found that marital conflict was related to greater child emotional insecurity about the family, which was associated with greater child anxiety, which were then related to disordered eating. In addition to serving as a secondary pathway linking emotional insecurity to child disordered eating, anxiety also significantly directly mediated the association between marital conflict and all three types of disordered eating: restrained eating, emotional eating and external eating in children. Next we examined if parental feeding practices (food monitoring, food restriction and parental pressure to eat) moderate the relation between marital conflict and child disordered eating. Parental pressure to eat was negatively associated with child disordered eating under higher marital conflict. The current study highlights the importance of marital conflict and child emotional security as precursors of child disordered eating. 相似文献
76.
This study examined the effects of localized muscle fatigue, age, and gender on lower extremity joint torques used during quiet stance. Thirty-two participants performed exercises designed to fatigue the ankle plantarflexors, knee extensors, torso extensors, or shoulder flexors. Body kinematics and ground reaction forces were obtained both before and after the exercises, and joint torques were derived via inverse dynamics. Single joint fatigue affected torque variability at all lower extremity joints, with similar changes for both age groups. Males and females exhibited increased ankle torque variability after different tasks, with males showing more variability after ankle fatigue and females after shoulder and lumbar fatigue. Correlations between peak torques and torque variability differed between males and females and between age groups in certain cases. The results of this study suggested that both age and gender moderate the effects of fatigue on postural control and should be considered when developing strategies to prevent occupational falls. 相似文献
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