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Vera-Assaoka, T, Ramirez-Campillo, R, Alvarez, C, Garcia-Pinillos, F, Moran, J, Gentil, P, and Behm, D. Effects of maturation on physical fitness adaptations to plyometric drop jump training in male youth soccer players. J Strength Cond Res 34(10): 2760-2768, 2020-The objective of this study was to compare the effects of maturation on physical fitness adaptations to a twice weekly, 7-week plyometric drop jump training program. Seventy-six young male soccer players (aged 10-16 years) participated in this randomized controlled trial. Before and after the intervention, a physical fitness test battery was applied (countermovement jump; drop jump from 20 to 40 cm; 5 multiple bounds test; 20-m sprint time; change of direction speed; 2.4-km running time-trial; 5 repetition maximum [RM] squat; and maximal kicking distance). Participants were randomly divided into an active soccer-control group (CG) with Tanner stage maturation of 1-3 (CG-early; n = 16) or Tanner stage 4-5 (CG-late; n = 22), and to plyometric drop jump training groups with Tanner stage 1-3 (plyometric jump training [PJT]-early; n = 16) or 4-5 (PJT-late; n = 22). The analysis of variance and effect size (ES) measures revealed that when compared with their age-matched controls, the PJT-early (ES = 0.39-1.58) and PJT-late (ES = 0.21-0.65) groups showed greater improvements (p < 0.05) in sprint time, 2.4-km running time-trial, change of direction speed, 5RM squat, jumping, and kicking distance. The PJT-early exceeded the PJT-late group with greater (p < 0.05) improvements in drop jump from 20 cm (ES = 1.58 vs. 0.51) and 40 cm (ES = 0.71 vs. 0.4) and kicking distance (ES = 0.95 vs. 0.65). Therefore, a 7-week plyometric drop jump training program was effective in improving physical fitness traits in both younger and older male youth soccer players, with greater jumping and kicking adaptations in the less-mature athletes.

This study aims to analyze the effect of different types of warm-ups on handgrip strength (HGS) in physically inactive older females. Secondarily, it aims to compare HGS according to their baseline nutritional status. A randomized crossover trial study was conducted with 44 physically inactive older females distributed into normal weight (n = 12, BMI = 23.9 ± 3.2 kg/m2), overweight (n =16, BMI = 27 ± 4.7 kg/m2) and obese (n = 16, BMI = 31.6 ± 5.3 kg/m2), who participated in three warm-up conditions (static stretching condition, SSC; elastic band condition, EBC; and therapeutic compression ball condition, TCBC) and one control condition (CC, no warm-up). All participants performed the four randomized conditions with recovery within 72 h. A significant decrease (p < 0.05) in HGS for the dominant and non-dominant hands was observed when comparing SSC vs. CC. In contrast, comparing the warm-up conditions according to the baseline nutritional status, statistically significant differences (p < 0.05) were only reported in the obese group in the dominant and non-dominant hand in favor of CC concerning SSC. In conclusion, warm-up with static flexibility led to a decrease in HGS in physically inactive older females. Only the obese group exhibited this result when analyzed by nutritional status.

La formación inicial docente por competencias representa un enfoque formativo que las universidades chilenas han establecido para estructurar el marco curricular de sus titulaciones. Este enfoque presenta un diseño no disciplinar y, por tanto, más orientado al desempeño profesional. El presente estudio tiene como objetivo identificar el nivel de desarrollo percibido de tres competencias específicas (la competencia de corporeidad, la planificación y el uso de la tecnología) durante el Prácticum de la formación universitaria inicial de la carrera de educación física por parte de los tutores universitarios, tutores de centro y los estudiantes en una universidad chilena el año 2020. En un estudio de caso y mediante la administración de un cuestionario, los resultados muestran niveles sensibles de desarrollo en las tres competencias analizadas, aunque se desarrollan de forma diferente según la tipología del Prácticum. Se ratifica que el Prácticum es determinante para el desarrollo de competencias según sus protagonistas. Initial teacher training by competences represents a training approach that Chilean universities have established in order to structure the curricular framework of their degrees. This approach presents a non-disciplinary design and it is therefore more oriented towards professional performance. The present study aims to identify the perceived level of development of three specific competences (corporeality competence, planning and use of technology) during the Practicum of the initial university training of the physical education course, by school tutors, university tutors and students, in a Chilean university in 2020. In a case study and through the administration of a questionnaire, the results show sensitive levels of development in the three competences analyzed, although they are developed differently according to the typology of the Practicum. This study confirms that the Practicum is decisive for the development of competences according to its participants. A formação inicial de professores por competências representa uma abordagem de formação que as universidades chilenas estabeleceram para estruturar a estrutura curricular de seus cursos. Esta abordagem apresenta um desenho não disciplinar e, portanto, mais orientado para a atuação profissional. O presente estudo tem como objetivo identificar o nível percebido de desenvolvimento de três competências específicas (a competência corporalidade, planejamento e uso de tecnologia) durante o Estágio da formação universitária inicial da carreira de educação física pelos tutores escolares, tutores universitários e alunos, em uma universidade chilena em 2020. Em um estudo de caso e por meio da aplicação de um questionário, os resultados mostram níveis sensíveis de desenvolvimento nas três competências analisadas, embora sejam desenvolvidas de forma diferente de acordo com a tipologia do Practicum. Ratifica-se que o Practicum é decisivo para o desenvolvimento de competências de acordo com seus protagonistas.