{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T21:13:01Z","timestamp":1792789981814,"version":"4.5.0"},"reference-count":29,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the University of Sydney Charles Perkins Centre Catchlove-Sylvan MCR Fellowship","award":["233235"],"award-info":[{"award-number":["233235"]}],"id":[{"id":"https:\/\/ror.org\/0384j8v12","id-type":"ROR","asserted-by":"crossref"}]},{"award":["233235"],"award-info":[{"award-number":["233235"]}],"id":[{"id":"https:\/\/ror.org\/0384j8v12","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Background\/Objectives: The Daily Health Coach (DHC) is a 12-week Instagram-based nutrition and wellbeing programme originally co-designed and tested in New Zealand to deliver evidence-based, weight-neutral content on nutrition, movement, body image, and wellbeing. This formative, mixed-methods adaptation study examined the acceptability of DHC New Zealand content for young Australian women and identified refinements to improve relevance, engagement, and safety before effectiveness evaluation. Methods: Using the CODES framework, we conducted three adaptation phases: user acceptance testing, co-design workshops, and early beta testing. Following data-quality screening, 291 young women aged 18\u201324 years who completed all 12 survey sections were included in Phase 1. Participants rated 84 Instagram-style posts for understanding and usefulness and provided open-ended feedback. Twelve young women participated in co-design workshops, and seven adapted artefacts were beta-tested with eight target users using cognitive walkthrough and think-aloud methods. Quantitative findings were examined descriptively, with sensitivity analyses undertaken to assess robustness to response-quality and sample-composition concerns. Results: Participant-level mean understanding was 3.99 \u00b1 0.75\/5, usefulness was 3.89 \u00b1 0.74\/5, and the combined score was 7.87 \u00b1 1.47\/10. Post-level combined means ranged from 7.66 to 8.11\/10; all 84 posts met a \u22657.5 descriptive benchmark adapted from prior message-testing work, although this is an interpretive aid rather than a validated cut-off. Sensitivity analyses showed a similar overall pattern: ratings were higher in a higher-confidence response-quality sample (n = 199; 8.34 \u00b1 1.20\/10), while four posts fell marginally below 7.5 when analysis was restricted to participants not reporting Aboriginal and\/or Torres Strait Islander identity (n = 101). Qualitative feedback identified six refinement areas: content features, engagement strategies, clarity, educational accuracy, relevance, and miscellaneous concerns. Co-design and beta testing generated four adaptation priorities: tone, design, engagement, and understanding. Conclusions: DHC New Zealand content was generally well understood and favourably rated but required targeted refinement for the Australian context. Findings provide formative guidance for final adaptation and subsequent effectiveness evaluation.<\/jats:p>","DOI":"10.3390\/nu18193150","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T13:26:11Z","timestamp":1790256371000},"page":"3150","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Too Wordy, Too Long and Too Cluttered: User Acceptance Testing, Co-Design, and Early Beta Testing to Adapt the Daily Health Coach for Young Australian Women"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7939-1790","authenticated-orcid":false,"given":"Rajshri","family":"Roy","sequence":"first","affiliation":[{"name":"Nutrition and Dietetics, Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"},{"name":"Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"}]},{"given":"Isabella","family":"Hamilton","sequence":"additional","affiliation":[{"name":"Nutrition and Dietetics, Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"given":"Demera","family":"Khan","sequence":"additional","affiliation":[{"name":"Nutrition and Dietetics, Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-2512-9332","authenticated-orcid":false,"given":"Mariah","family":"Issa","sequence":"additional","affiliation":[{"name":"Nutrition and Dietetics, Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"},{"name":"Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia"},{"name":"School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-5323-724X","authenticated-orcid":false,"given":"Jasmin","family":"Alami","sequence":"additional","affiliation":[{"name":"TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"methodology","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5569-1019","authenticated-orcid":false,"given":"Jessica A.","family":"Malloy","sequence":"additional","affiliation":[{"name":"Nutrition and Dietetics, Susan Wakil School of Nursing and Midwifery, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Rod, N.H., Davies, M., de Vries, T., Kreshpaj, B., Drews, H., Nguyen, T.-L., and Elsenburg, L.K. 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