Knee joint position sense of roller hockey players: a comparative study     

João Venâncio  Diogo Lopes  Joaquim Lourenço  Fernando Ribeiro 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(2):162-168

This study aimed to compare knee joint position sense of roller hockey players with an age-matched group of non-athletes. Forty-three male participants voluntarily participated in this cross-sectional study: 21 roller hockey players (mean age: 23.2 ± 4.2 years old, mean weight: 81.8 ± 9.8 kg, mean height: 180.5 ± 4.1 cm) and 22 age-matched non-athletes (mean age: 23.7 ± 3.9 years old, mean weight: 85.0 ± 6.2 kg, mean height: 181.5 ± 5.0 cm). Knee joint position sense of the dominant limb was evaluated using a technique of open-kinetic chain and active knee positioning. Joint position sense was reported using absolute, relative and variable angular errors. The main results indicated that the group of roller hockey players showed significantly lower absolute (2.4 ± 1.2º vs. 6.5 ± 3.2º, p ≤ 0.001) and relative (1.7 ± 2.1º vs. 5.8 ± 4.4º, p ≤ 0.001) angular errors in comparison with the non-athletes group. In conclusion, the results from this present study suggest that proprioceptive acuity, assessed by measuring joint position sense, is increased in roller hockey players. The enhanced proprioception of the roller hockey players could contribute to injury prevention and improved performance during sporting activities.  相似文献   

Interdisciplinary therapy changes superoxide dismutase activity and adiponectin in obese adolescents: a randomised controlled trial     

João Elias Dias Nunes  Heitor Santos Cunha  Zulmária Rezende Freitas  Ana Maria Caixeta Nogueira  Ana Raimunda Dâmaso  Foued Salmen Espindola 《Journal of sports sciences》2016,34(10):945-950

The objective of this study is to evaluate the effect of interdisciplinary therapy in the parameters of the oxidative stress and the anti-inflammatory responses of obese adolescents. We selected 57 participants, who were randomly divided into 2 groups: interdisciplinary therapy group and a control group. After 6 months of intervention, 17 participants of the interdisciplinary therapy group and 8 of the control group returned for re-evaluation. The interdisciplinary therapy group participated in a treatment with 4 weekly sessions of exercise, a weekly group therapy session and a weekly nutritional education session. Blood parameters of oxidative stress and anti-inflammatory response were evaluated. The results demonstrated that there were significant increases in the interdisciplinary therapy group for superoxide dismutase activity (6.56 ± 3.22 to 11.40 ± 7.49) and ferric-reducing antioxidant potential concentration (532.91 ± 106.48 to 573.25 ± 112.57), although adiponectin levels did not reduce (40.9 ± 29.34 to 49.05 ± 41.22). A significant decrease in nitrite levels was also found (14.23 ± 8.48 to 11.45 ± 6.05). In the control group, significant reduction was found in adiponectin (31.56 ± 18.88 to 18.01 ± 11.66). This study suggests that interdisciplinary therapy for 6 months was effective in improving the anti-inflammatory responses and the antioxidant defences in obese adolescents.  相似文献   

How do elite ski jumpers handle the dynamic conditions in imitation jumps?     

Gertjan Ettema  Jo Hooiveld  Steinar Braaten  Maarten Bobbert 《Journal of sports sciences》2016,34(11):1081-1087

We examined the effect of boundary conditions in imitation ski jumping on movement dynamics and coordination. We compared imitation ski jumps with – and without – the possibility to generate shear propulsion forces. Six elite ski jumpers performed imitation jumps by jumping from a fixed surface and from a rolling platform. The ground reaction force vector, kinematics of body segments, and EMG of eight lower limb muscles were recorded. Net joint dynamics were calculated using inverse dynamics. The two imitation jumps differed considerably from each other with regard to the dynamics (moments, forces), whereas the kinematics were very similar. Knee power was higher and hip power was lower on the rolling platform than on the fixed surface. Mean EMG levels were very similar for both conditions, but differences in the development of muscle activity were indicated for seven of eight muscles. These differences are reflected in a subtle difference of the alignment of ground reaction force with centre of mass: the ground reaction force runs continuously close to but behind the centre of mass on the rolling platform and fluctuates around it on the fixed surface. This likely reflects a different strategy for controlling angular momentum.  相似文献   

Are the new starting block facilities beneficial for backstroke start performance?     

Karla de Jesus  Kelly de Jesus  J. Arturo Abraldes  Alexandre Igor Araripe Medeiros  Ricardo J. Fernandes  João Paulo Vilas-Boas 《Journal of sports sciences》2016,34(9):871-877

We aimed to analyse the handgrip positioning and the wedge effects on the backstroke start performance and technique. Ten swimmers completed randomly eight 15 m backstroke starts (four with hands on highest horizontal and four on vertical handgrip) performed with and without wedge. One surface and one underwater camera recorded kinematic data. Standardised mean difference (SMD) and 95% confidence intervals (CI) were used. Handgrip positioning did not affect kinematics with and without wedge use. Handgrips horizontally positioned and feet over wedge displayed greater knee angular velocity than without it (SMD = ?0.82; 95% CI: ?1.56, ?0.08). Hands vertically positioned and feet over wedge presented greater take-off angle (SMD = ?0.81; 95% CI: ?1.55, ?0.07), centre of mass (CM) vertical positioning at first water contact (SMD = ?0.97; 95% CI: ?1.87, ?0.07) and CM vertical velocity at CM immersion (SMD = 1.03; 95% CI: 0.08, 1.98) when comparing without wedge use. Swimmers extended the hip previous to the knee and ankle joints, except for the variant with hands vertically positioned without wedge (SMD = 0.75; 95% CI: ?0.03, 1.53). Swimmers should preserve biomechanical advantages achieved during flight with variant with hands vertically positioned and wedge throughout entry and underwater phase.  相似文献   

Development of creativity: The influence of varying levels of implementation of the DISCOVER curriculum model, a non-traditional pedagogical approach     

C. June Maker  Sonmi Jo  Omar M. Muammar 《Learning and individual differences》2008,18(4):402

Development of creativity is influenced by multiple factors, including the environment, developmental changes, and measurement tools. In this study, we investigated the relationship between creativity development and implementation of the Discovering Intellectual Strengths and Capabilities while Observing Varied Ethnic Responses (DISCOVER) curriculum model. Using the Test of Creative Thinking–Drawing Production (TCT-DP), 1986 culturally diverse, low-income students, K through 6, in four elementary schools in the U.S. were assessed for three consecutive years. The creativity of all children increased from grades K to 6, but children in classrooms of low implementers demonstrated a dip and some “pauses.” Differences in scores of children in middle/high and low implementers' classrooms were significant. The implication is that creativity development is supported through active learning, student choice, access to varied materials, exploration, self-evaluation, problem finding, and problem solving. Additional analyses need to be conducted to uncover cultural and linguistic influences in these four schools.  相似文献   

Integrating Curriculum Across Courses in the Same Semester and Across Semesters Using a Service Learning Project     

William Richmond  Debasish Banerjee  Barbara Jo White 《Decision Sciences Journal of Innovative Education》2008,6(2):509-513

  相似文献   

Investigating the impact of teacher education strategies on preservice teachers' TPACK     

Evrim Baran  Sedef Canbazoglu Bilici  Aylin Albayrak Sari  Jo Tondeur 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(1):357-370

The purpose of this study was to examine preservice teachers' perceptions of the support their teacher education programs provide for developing their technological pedagogical content knowledge (TPACK). The research was conducted with 215 preservice teachers in the last year of teacher education programs and teaching certificate programs in three universities in Turkey. Data sources were the synthesis of qualitative evidence (SQD) scale that was validated in the Turkish context as part of this study and the TPACK-practical scale. The strategies investigated in the SQD-model included: using teacher educators as role models; reflecting on the role of technology in education; learning how to use technology by design; collaboration with peers; scaffolding authentic technology experiences; and providing continuous feedback. The linear regression analysis revealed a positive relation between teacher education strategies and preservice teachers' TPACK. Reflection and teacher educators' as role models were the most frequently used teacher education strategies in teacher education programs included in this study. Results provided recommendations for further research on the connection between the teacher education strategies and the development of preservice teachers' TPACK in teacher education programs.  相似文献   

The Application of Both-Ways and Two-Eyed Seeing Pedagogy: Reflections on Engaging and Teaching Science to Post-secondary Indigenous Students     

Michael Michie  Michelle Hogue  Joël Rioux 《Research in Science Education》2018,48(6):1205-1220

The issue of Indigenous engagement, participation and success in the sciences is a concern both in Australia and in Canada. The authors of this paper have taught Indigenous students in tertiary enabling programs, undergraduate science and science education. Their experiences bridging Indigenous and Western cultures in science and science education through Both-Ways (BW) or Two-Eyed Seeing (TES) pedagogical and methodological approaches form the data for this paper. Their teaching experience with tertiary level Indigenous students using BW/TES pedagogies serves as case studies for the epistemic insight (knowledge about knowledge) they have gained. Each of the case studies considers the role of the Nature of Science (NOS) and potential conflicts through engagement with the two knowledge paradigms. Rather than being in conflict, the two worldviews are seen as complementary, a situation leading to epistemic insight.  相似文献   

Rethinking children's spaces and places     

Jo Pike 《Education 3-13》2018,46(3):378-379

  相似文献   

Studying for Exams Just Got More Relaxing—Animal-Assisted Activities at the University of Connecticut Library     

Jo Ann Reynolds  Laurel Rabschutz 《College & Undergraduate Libraries》2013,20(4):359-367

In recent years, academic libraries have expanded their traditional focus on intellectual and scholarly pursuits, with many libraries now initiating programs that support student growth, development, and wellness. Although providing animal-assisted activities to college students is a fairly new concept, the social and therapeutic benefits of pet ownership or simply interacting with a companion animal are well documented. The University of Connecticut's Homer Babbidge Library on the Storrs campus chose to support the physical and emotional well-being of students during the stress-filled week of finals by providing therapy dogs. Student interaction and feedback were overwhelmingly positive.  相似文献