The effects of two different swimming training periodization on physiological parameters at various exercise intensities     

Vicente Javier Clemente-Suárez  Athanasios Dalamitros  João Ribeiro  Ana Sousa  Ricardo J. Fernandes  J. Paulo Vilas-Boas 《European Journal of Sport Science》2017,17(4):425-432

This study analysed the effects of two different periodization strategies on physiological parameters at various exercise intensities in competitive swimmers. Seventeen athletes of both sexes were divided to two groups, the traditional periodization (TPG, n?=?7) and the reverse periodization group (RPG, n?=?10). Each group followed a 10-week training period based on the two different periodization strategies. Before and after training, swimming velocity (SV), energy expenditure (EE), energy cost (EC) and percentage of aerobic (%Aer) and anaerobic (%An) energy contribution to the swimming intensities corresponding to the aerobic threshold (AerT), the anaerobic threshold (AnT) and the velocity at maximal oxygen uptake (vVO₂max) were measured. Both groups increased the %An at the AerT and AnT intensity (P?≤?.05). In contrast, at the AnT intensity, EE and EC were only increased in TPG. Complementary, %Aer, %An, EE and EC at vVO₂max did not alter in both groups (P?>?.05); no changes were observed in SV in TPG and RPG at all three intensities. These results indicate that both periodization schemes confer almost analogous adaptations in specific physiological parameters in competitive swimmers. However, given the large difference in the total training volume between the two groups, it is suggested that the implementation of the reverse periodization model is an effective and time-efficient strategy to improve performance mainly for swimming events where the AnT is an important performance indicator.  相似文献   

Teaching conversation skills to behaviorally disordered children     

K. Richard Young  Daniel P. Morgan  Terri Jo Peterson  William R. Jenson 《Psychology in the schools》1988,25(2):164-174

The purpose of this study was to test the effectiveness of an instructional package designed to teach conversation skills to behaviorally disordered children. A multiple baseline design with a reversal was employed to assess the effectiveness of this package. Six children were taught in two groups of three. The teachers were taught to use the package prior to implementation to insure standardization across both groups. Data were collected in a contrived setting with a peer trained as a conversant. Observation also took place in the school cafeteria to assess generalization of the training to a naturalistic setting. Social validation data were collected from teachers and children to evaluate their impressions of the instructional package. Results indicated that the instructional package was effective in increasing conversational skills above baseline levels in all children and in both settings.  相似文献   

Huey P. Newton Enthroned—Iconic Image of Black Power     

Jo‐Ann Morgan 《Journal of American culture (Malden, Mass. : 2003)》2014,37(2):129-148

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Binge-eating and vomiting: A survey of a high school population     

Jo A. Carter  Pamela A. Duncan 《Psychology in the schools》1984,21(2):198-203

A survey of 421 high school females was conducted to determine the prevalence of the binge/purge practice, bulimia, an eating disorder. Teenage vomiters in this study were found to have higher levels of somatic symptoms, anxiety, social dysfunction, and depression than did nonvomiters. They were also found to have disturbed attitudes toward food, eating, and dieting. Of the vomiters, 58% scored above the threshold score that indicates the presence of psychological and behavioral symptoms characteristic of anorexia nervosa. The findings provide information useful to school personnel who work with the social, behavioral, and academic problems of adolescents.  相似文献   

The Severe Exercise Domain Amplitude: A Comparison Between Endurance Runners and Cyclists     

João A. G. Raimundo  Tiago Turnes  Rafael A. de Aguiar  Felipe D. Lisbôa  Thiago Loch  Guilherme Ribeiro 《Research quarterly for exercise and sport》2019,90(1):3-13

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How the medical professionals impact ASL and English families’ language planning policy     

Bobbie Jo Kite 《Psychology in the schools》2020,57(3):402-417

This article explores the journey of eight hearing families of bimodal-bilingual deaf children as they navigate the decision-making process reflecting their beliefs and values about American Sign Language (ASL) and English through their family language policy framework. The resources offered to families with deaf children often reflect a medical view, rather than a cultural perspective of being deaf. Because medical professionals, educators, and specialists who work with deaf and hard-of-hearing children have a strong influence on family members’ opinions, beliefs, and attitudes about being deaf, it is even more crucial to correct misconceptions about ASL and empower families to develop a family language policy that is inclusive of their deaf and hard-of-hearing children. This article informs researchers, teachers, and other professionals about the potential benefits and challenges of supporting the families’ ASL and English language planning policy.  相似文献   

Gonadal hormones may predict structural bone fragility in elite female soccer player     

Charlotte Lanhers  Daniel Courteix  João Valente-Dos-Santos  Beatrice Ferry  Luis Gracia-Marco  Bruno Pereira 《Journal of sports sciences》2020,38(7):827-837

ABSTRACT

Purpose: This study determined the impact of menstrual status on bone tissue in elite post-pubertal female soccer players over an entire season.

Methods: Fifty-one elite female soccer players participated. At baseline, forty-one were assigned to the low hormonal androgenic profile (low-HAPL) and 10 to the high hormonal androgenic profile (high-HAPL).

Results: An 8-month training program led to increased bone mineral density content (p<0.05). The low-HAPL athletes improved the Narrow neck average cortical thickness (ACT) by 1.4% and reduced the corresponding Buckling ratio (BR) by 2.6%, thus decreasing the fracture risk (p<0.05). The high-HAPL athletes decreased the Narrow neck ACT by 5.4% and increased the BR by 2.6%, increasing fracture risk (p<0.05). Differences were assigned as being “very likely beneficial” for the low-HAPL athletes, supported by very large (d=3.41) and large (d=1.58) effect sizes for the Narrow neck ACT and BR, respectively.

Conclusion: A season of soccer training has induced bone geometry improvements in adolescent females. Bone health parameters improved in the two clusters. However, high-HAPL athletes decreased its resistance to loading compare to low-HAPL athletes. Even if female players do not present clinical symptoms related to their hormonal status, sport medicine physicians should pay attention to their structural bone fragility.  相似文献   

Between republicans and freemasons: A lost zoological collection found in a very particular school     

João Lourenço Monteiro 《Endeavour》2018,42(4):196-199

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The relationship between teaching practices and student achievement in first year classes     

Joël Clanet 《European Journal of Psychology of Education - EJPE》2010,25(2):192-206

This study investigated the links between the teaching practices of primary school teachers (n = 200) who were observed while presenting a new text to their first year classes, and the student achievement levels in those classes. The teaching practices are specifically concerned with the way the teachers supported and encouraged students’ activities during verbal interactions. Two different populations were observed: classes of first year students with a reduced teacher–student ratio (about ten students per class) and classes with a normal teacher–student ratio (between 20 and 25 students per class). We found that the average level of student achievement in the reduced size classes was higher than in the standard size classes but that teaching practices differed only at precise periods of group or individual introduction to new reading texts. In these periods, we found links between teaching practices and student achievement.  相似文献   

Are schools meeting their clients' expectations? Parents voice their perceptions about children learning to read in schools today     

Jo Fletcher  Janinka Greenwood  Faye Parkhill 《Teaching and Teacher Education》2010

This research, as part of a larger project examining effective reading instruction for 10–12 year old students, explores the perceptions of thirteen parents in six schools. The study identified: parents recognise their engagement in reading with their children impacts on children's motivation to read; parents have concerns about the degree to which schools meet children's reading needs; and some parents seek external assessment and support. The study as a whole indicates the importance of effective home school relationships.  相似文献