Associations Between Motor Competence and Physical Activity, Physical Fitness and Psychosocial Characteristics in Adolescents: A Systematic Review and Meta-analysis.

Background: Motor competence is an integral component of the health and performance of youth. Numerous studies support the hypothesis that motor competence interacts with perceived motor competence and physical fitness during childhood to induce positive (e.g.

The Training of Medium- to Long-Distance Sprint Performance in Football Code Athletes: A Systematic Review and Meta-analysis.

Background: Within the football codes, medium-distance (i.e., > 20 m and ≤ 40 m) and long-distance (i.

Sprint and Jump Mechanical Profiles in Academy Rugby League Players: Positional Differences and the Associations between Profiles and Sprint Performance.

This cross-sectional study evaluated the sprint and jump mechanical profiles of male academy rugby league players, the differences between positions, and the associations between mechanical profiles and sprint performance. Twenty academy rugby league players performed 40-m sprints and squat jumps at increasing loads (0-80 kg) to determine individual mechanical (force-velocity-power) and performance variables. The mechanical variables (absolute and relative theoretical maximal force-velocity-power, force-velocity linear relationship, and mechanical efficiency) were determined from the mechanical profiles.

Physical Preparation in Female Rugby Codes: An Investigation of Current Practices.

Female sports have recently seen a dramatic rise in participation and professionalism world-wide. Despite progress, the infrastructure and general sport science provisions in many female sports are behind their male counterparts. From a performance perspective, marked differences in physical and physiological characteristics can be seen between the sexes.

The Training of Short Distance Sprint Performance in Football Code Athletes: A Systematic Review and Meta-Analysis.

Background: Short-sprint (≤ 20 m) performance is an important quality for success in the football codes. Therefore, developing an evidence base for understanding training methods to enhance short-sprint performance is key for practitioners. However, current systematic reviews are limited by (1) a lack of focus on football code athletes, (2) a lack of consideration of all training modalities and (3) a failure to account for the normal training practices undertaken by intervention groups within their analysis.

Detection of differentially expressed genes in an isogenic breast metastasis model using RNA arbitrarily primed-polymerase chain reaction coupled with array hybridization (RAP-array).

To facilitate the study of the mechanisms of breast cancer metastasis we have previously characterized a pair of breast tumor cell lines that originate from the same breast tumor cell line MDA-MB-435, but which have diametrically opposite metastatic capabilities. These cell lines constitute a stable and accessible experimental system for the identification of metastasis-related genes and for the study of their role in the process of metastasis. In this study, we used a combination of RNA arbitrarily primed-polymerase chain reaction (RAP-PCR) fingerprinting and cDNA arrays (here termed "RAP-array") to identify genes differentially expressed with respect to metastatic phenotype.