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Pedro L. Valenzuela Michael McGuigan Guillermo Sánchez-Martínez Elaia Torrontegi Javier Vázquez-Carrión Zigor Montalvo 《Journal of sports sciences》2020,38(19):2273-2278
ABSTRACT The present study aimed to provide reference values for lower-limb muscle power assessed during the incremental jump squat (JS) test in elite athletes (i.e., professional athletes competing at international level). We pooled data from all JS tests performed by elite athletes of different sports in two high-performance centres between 2015 and 2019, and computed reference values (i.e., terciles) for mean power (MP), mean propulsive power (MPP), and peak power (PP). Reference values were obtained from 684 elite athletes (458 male and 226 female) of 16 different sports (boxing, judo, karate, fencing, taekwondo, wrestling, basketball, soccer, futsal, handball, rugby union, badminton, tennis, long distance running, triathlon, and sprinting). Significant differences (p < 0.001) were found between male and female athletes for MP (7.47 ± 1.93 and 6.15 ± 1.68 W·Kg?1, respectively), MPP (10.50 ± 2.75 and 8.63 ± 2.43 W·Kg?1), and PP (23.64 ± 6.12 and 19.35 ± 5.49 W·Kg?1). However, the velocity at which these power measures was attained seemed to be independent of sex (~0.95, 1.00 and 2.00 m·s?1 for mean, mean propulsive, and peak velocity, respectively) and homogeneous across different sport disciplines (coefficient of variation <10%). These data can be used to classify athletes’ power capabilities, and the optimum velocity ranges provided here could be useful for training purposes. 相似文献
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Graham Wise Ivan Carrazco Montalvo 《Journal of Higher Education Policy & Management》2018,40(4):342-358
A public university was established in 2014 as a cornerstone of Ecuador’s sweeping higher education reforms. Four years later, Universidad Regional Amazónica Ikiam had developed internationally benchmarked teaching, research and community service missions within the Ecuadorian Amazon. The creation of Ikiam occurred during a period of broad international discourse on the importance to universities of academic excellence, innovation system impact, and regional relevance. This case study tests whether a top-down state-driven development model can establish a university on principles of excellence, impact and relevance. The creation of Ikiam is analysed qualitatively and the results are discussed in context with national and international policy settings for higher education and innovation. This study provides insights for low and middle-income countries to strengthen higher education and innovation systems through university creation. Internationally it provides practical insights for university master planning taskforces to build organisational strength and distinctiveness through excellence, impact and relevance. 相似文献
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Rick Sperling Jennifer Zwahr-Castro Felicia Cruz Jason Montalvo 《Journal of Latinos & Education》2017,16(2):110-123
Previous research has shown that people often engage in cultural-deficit thinking when reasoning about racial/ethnic achievement gaps. However, it is unclear whether culture-blaming explanations are best thought of as group-level internal attributions, expressions of prejudice against a lower status group, or self-serving bias. In this study, White and Latino participants (N = 328) responded to items that were written to express either a White-critical or pro–Asian American perspective on the White–Asian American achievement gap. Results indicated that Latinos were more likely to engage in pro-Asian than White-critical culture blaming, whereas expressions of culture blaming did not vary across frames among White participants. 相似文献
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Pedro L. Valenzuela Zigor Montalvo G. Sánchez-Martínez Elaia Torrontegi J. De La Calle-Herrero R. Domínguez-castells 《European Journal of Sport Science》2018,18(5):677-684
This study aimed to determine which contractile properties measured by tensiomyography (TMG) could better differentiate athletes with high- and low-power values, as well as to analyse the relationship between contractile properties and power production capacity. The contractile properties of the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) of an Olympic women’s Rugby Sevens team (n?=?14) were analysed before a Wingate test in which their peak power output (PPO) was determined. Athletes were then divided into a high-power (HP) and a low-power (LP) group. HP presented an almost certainly higher PPO (9.8?±?0.3 vs. 8.9?±?0.4 W kg?1, ES?=?3.00) than LP, as well as a very likely lower radial displacement (3.39?±?1.16 vs. 5.65?±?1.50?mm, ES?=?1.68) and velocity of deformation (0.08?±?0.02 vs. 0.13?±?0.03 mm ms?1, ES?=?1.87) of the VL. A likely lower time of delay was observed in HP for all analysed muscles (ES?>?0.60). PPO was very largely related to the radial displacement (r?=??0.75, 90% CI?=??0.90 to ?0.44) and velocity of deformation (r?=??0.70, 90% CI?=??0.87 to ?0.34) of the VL. A large correlation was found between PPO and the time of delay of the VL (r?=??0.61, 90% CI?=??0.84 to ?0.22). No correlations were found for the contractile properties of RF or VM. These results highlight the importance of VL contractile properties (but not so much those of RF and VM) for maximal power production and suggest TMG as a practical technique for its evaluation. 相似文献
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Engagement in Academic Work: The Role of Learning Goals, Future Consequences, Pleasing Others, and Perceived Ability 总被引：2，自引：0，他引：2
Raymond B. Miller Barbara A. Greene Gregory P. Montalvo Bhuvaneswari Ravindran Joe D. Nichols 《Contemporary educational psychology》1996,21(4):388-422
Engagement in academic work was viewed from a multiple goals perspective. Two studies were conducted in which high school math students completed an instrument measuring five goals students might have for doing academic work (learning goals, performance goals, obtaining future consequences, pleasing the teacher, and pleasing the family), perceived math ability, self-regulatory activities, strategies (deep or shallow) used when studying for math, and the amount of effort and persistence expended on the class. Factor analysis indicated that the five goals scales and the perceived ability scale represented unique factors. The correlations among the variables revealed theoretically consistent interrelationships. Multiple regression analyses indicated that various goals (e.g., learning goals, obtaining future consequences, and pleasing the teacher), perceived ability, and some interactions accounted for significant amounts of variance in the task engagement measures (self-regulation, strategy use, effort, and persistence) and achievement. Results are discussed in relation to current theory and their practical implications. 相似文献
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