Micro-electromechanical systems (MEMS) have reduced drastically in size, cost, and power consumption, while improving accuracy. The combination of different sensor technologies is considered a promising step in the monitoring of athletes. Those “wearables” enable the capturing of relevant physiological and tactical information in individual and team sports and thus replacing subjective, time-consuming and qualitative methods with objective, quantitative ones. Prior studies mainly comprised sports categories such as: targeting sports, batting and fielding games as well as net and wall games, focusing on the detection of individual, non-locomotive movements. The increasing capabilities of wearables allow for more complex and integrative analysis expanding research into the last category: invasion sports. Such holistic approaches allow the derivation of metrics, estimation of physical conditions and the analysis of team strategic behavior, accompanied by integrative knowledge gains in technical, tactical, physical, and mental aspects of a sport. However, prior and current researchers find the precise measurement of the actual movement within highly dynamic and non-linear movement difficult. Thus, the present article showcases an overview of the environments in which the wearables are employed. It elaborates their use in individual as well as team-related performance analyses with a special focus on reliability and validity, challenges, and future directions.

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Sequence‐controlled polymers are synthetic macromolecules composed of co‐monomers arranged in a precise manner. When defined as letters of an alphabet such as the 0/1 bits of the ASCII code, building units can be used to store information at the molecular level. So‐encoded messages can be read by MS/MS sequencing which complexity, however, highly depends on the polymer backbone chemistry. In this perspective special feature article, Laurence Charles, Jean‐François Lutz and co‐authors show that the structure of these polymers can be specifically designed to achieve most simple CID spectra and hence improved MS/ MS readability. Laurence Charles is Professor of Chemistry at Aix Marseille University (Marseille, France). Her research interests are centered on ionization and gas‐phase ion chemistry for synthetic polymers.

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