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Objective: To explore the implications of shifting from the concept of “doing with” to one of “doing together” in the field of public health research in France, with a focus on the necessary transformation of the researcher’s role and stance.

Methods: This article draws in particular on the conclusions of the seminar “‘Doing with’: What effect on my stance as a researcher in public health?” held within the framework of the Doctoral Network in Public Health at the École des Hautes Études en Santé Publique (EHESP).

Results: This article underscores the importance of deconstructing and then reconstructing the conception of research to better incorporate the “Doing together” approach in the field of public health.

Development and validation of an occurrence-based healthy dietary diversity (ORCHID) score easy to operationalise in dietary prevention interventions in older adults: a French study.

Healthy diet and dietary diversity have been associated with healthy ageing. Several scores have been developed to assess dietary diversity or healthy diets in epidemiological studies, but they are not adapted to be used in the context of preventive nutrition interventions. This study aimed to develop an occurrence-based healthy dietary diversity (ORCHID) score easy to implement in the field and to validate it using dietary data from older participants in the latest French food consumption survey (INCA3).

Study protocol for a pragmatic cluster randomized controlled trial to improve dietary diversity and physical fitness among older people who live at home (the "ALAPAGE study").

Background: Diet and physical activity are key components of healthy aging. Current interventions that promote healthy eating and physical activity among the elderly have limitations and evidence of French interventions' effectiveness is lacking. We aim to assess (i) the effectiveness of a combined diet/physical activity intervention (the "ALAPAGE" program) on older peoples' eating behaviors, physical activity and fitness levels, quality of life, and feelings of loneliness; (ii) the intervention's process and (iii) its cost effectiveness.