# PAR: Towards a Reference Architecture for Accessible Platforms in Respiratory Therapies
## 1 Introduction  
The COVID-19 pandemic [1] has underscored the importance of addressing respiratory diseases and the necessity for effective therapies to enhance the quality of life for affected individuals. In this context, chronic respiratory diseases have presented a significant challenge with a global impact across social, economic, and environmental dimensions. The World Health Organization (WHO) notes that between 2000 and 2019 [2], chronic respiratory diseases caused 4.1 million deaths globally, with a 37% decrease in mortality from these diseases during that period. This scenario highlights the relevance of implementing sustainable strategies to address these conditions, aligned with Sustainable Development Goals (SDGs) 3, 4, and 10, aiming to ensure a healthy life, promote inclusive and equitable education, and reduce inequalities while fostering social inclusion [3]. In this context, having an accessible platform for respiratory therapies can significantly contribute to the sustainability of healthcare by improving access to treatments and techniques to enhance lung function. It can also promote education and training for professionals in respiratory therapy, thereby reducing disparities in healthcare access. Information and communication technologies (ICTs) are pivotal in addressing physical and functional recovery and facilitating social reintegration, mainly through pulmonary rehabilitation programs. In response to these challenges, telemedicine and telerehabilitation(TR) have emerged as indispensable tools for delivering comprehensive respiratory care. These technologies bridge the gap between patients and healthcare providers, ensuring the safety and accessibility of healthcare services. In this context, telerehabilitation has become invaluable for providing remote healthcare services. A team of professionals identified the need to design and implement a series of straightforward telerehabilitation exercises to improve physical conditions in individuals, particularly those with pulmonary respiratory diseases. In formulating our proposed solution, we adhered to a user-centered design (UCD) process, prioritizing users' needs throughout every design phase. Our methodology is grounded in the iPlus approach [4], initially devised for educational software, encompassing the virtual reality serious game for recreational therapy [4]. The iPlus methodology provides a unified approach seamlessly integrated with agile methods. It initiates problem definition and delineates intended learning outcomes, involving input from both experts and users to discern requirements. iPlus advocates for active and creative engagement from all stakeholders, emphasizing a participatory approach that ensures designers and users prioritize user requirements throughout the educational software design process. Consequently, the research team has devised a digital platform integrating therapeutic education exercises for respiratory rehabilitation to enhance the quality of life for individuals with respiratory diseases. The developed educational telerehabilitation material will be accessible on a freely available platform. This resource is a valuable tool for professionals in education, rehabilitation, and healthcare, enabling them to integrate it into their intervention plans for respiratory rehabilitation. Furthermore, the platform can serve as both an assessment tool and an intervention instrument, allowing for tracking each patient's progress. Professionals can utilize these data to adapt and customize rehabilitation plans, select appropriate exercises, and enhance the development of physical processes such as respiration, motor skills, pain reduction, strength, and mobility. The exercises included in the educational platform, named \"PAR\", were meticulously designed by medical experts, ensuring that the workouts are simple and easy to perform. Additionally, the platform was intended to follow Universal Design for Learning (UDL) principles.