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To promote a physically active lifestyle, a digital training diary (<jats:italic>Trainingslog<\/jats:italic>) was developed in an user-centered approach by the Swiss Ankylosing Spondylitis Association (SVMB). A training diary promotes PA through feedback, goal setting and self-monitoring, which can also be used for PA counselling by physiotherapists (PT). Usability, feasibility and acceptance are essential for the successful implementation of a mobile Health Intervention such as the <jats:italic>Trainingslog<\/jats:italic>. The study objective is to evaluate the usability, feasibility and acceptance of the <jats:italic>Trainingslog<\/jats:italic> for individuals with axSpA and PTs.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>A mixed-methods design was performed among potential end-users of the <jats:italic>Trainingslog<\/jats:italic>. Quantitative data was collected by use of questionnaires (System Usability Scale (SUS, 0-100 scale), user version of the Mobile App Rating Scale (uMARS, 5 point scale)) and number of training entries. Subsequently, qualitative data was gathered through semi-structured online focus groups or individual interviews.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>11 PTs (9 women, mean age 52.5 [SD 15.6]) and 10 individuals with axSpA (6 women, mean age 48 [SD 13.4]) participated. The quantitative data showed mean SUS scores for usability of 82.5 [SD 21.76] for PTs and 77.0 [SD 9.34] for individuals with axSpA. The mean uMARS sector B scores for feasibility were 4.2 [SD 0.49] for PTs and 4.1 [SD 0.38] for individuals with axSpA. Acceptance, as indicated by the uMARS results (mean score\u2009&gt;\u20093 in Sectors E and F for both groups), was given. But there was a lower-than-expected agreement in the training entries, with 59.86% of entries matching between the <jats:italic>Trainingslog<\/jats:italic> and the paper diary. The qualitative analysis unveiled that while usability and feasibility were good, acceptance was lower, primarily due to the use of a web-based link instead of an app version.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>The <jats:italic>Trainingslog<\/jats:italic> showed a good usability and feasibility, while the acceptance was lower than expected. Acceptance could be increased by offering the <jats:italic>Trainingslog<\/jats:italic> as an app-based version, along with implementing additional recommendations for enhancement. Consequently, the <jats:italic>Trainingslog<\/jats:italic> has the potential to be applied in PA counselling by PTs or as a self-monitoring tool for individuals with axSpA.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/s41927-025-00463-5","type":"journal-article","created":{"date-parts":[[2025,2,18]],"date-time":"2025-02-18T04:55:56Z","timestamp":1739854556000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Evaluation of usability, feasibility and acceptance of the digital training diary Trainingslog for individuals with axSpA: a mixed-method study"],"prefix":"10.1186","volume":"9","author":[{"given":"Neva","family":"Pfyl","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lea","family":"Ettlin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"Niedermann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne-Kathrin","family":"Rausch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,2,18]]},"reference":[{"key":"463_CR1","doi-asserted-by":"crossref","unstructured":"Mangone M, Paoloni M, Procopio S, Venditto T, Zucchi B, Santilli V, et al. 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