The purpose of this article is to propose a systematic for mobile apps used to track performance during the practice of sports, applying it to recreational surfing, through the user-centered design process for developers and companies to develop products that achieve their goal providing a positive user experience. This research was based on a systematic review of literature on UX Design, User-Centered Design and in tools with the greatest potential to be used to measure performance during the sports practice, such as GPS, accelerometer and gyroscope to measure the physiological variables involved. The results show the use of the systematic in a mobile app for recreational surfing, detailing the design process applied in a system composed of the app and a device used to capture data from the sports practice. The systematic was positively evaluated to guide the development of mobile apps for surfing and other sports that share the outlined physiological variables.

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The aim of this study was to determine and compare the ergonomic requirements in the use of desktop computers and laptops. For comparison, postures in the sagittal and transversal planes involved while performing a typing and editing task on a desktop and laptop computers were verified. Thus, a case study was conducted with a Brazilian male of medium height, who works around 20 hours per week in a computer. Nine spherical markers of 2.5 cm in diameter were joined up with duct tape on the right side of the participant and the positions adopted by the subject were analyzed in the use of a desktop and a laptop computer, through direct observation and filming, using the videography technique. It is concluded that the use of desktop computers has lesser biomechanical demands since it showed angles closer to a neutral position and consequently having a lower risk of musculoskeletal complaints.