Older adults' experiences of a physical activity and sedentary behaviour intervention : A nested qualitative study in the sitless multi-country randomised clinical trial - Blackburn, Nicole E.. (Ulster University. Institute of Nursing and Health Research) ; Skjodt, Mathias (University of Southern Denmark. Department of Sports Science and Clinical Biomechanics) ; Tully, Mark (Ulster University. Institute of Mental Health Sciences) ; Mc Mullan, Il0na (Ulster University. Institute of Mental Health Sciences) ; Giné-Garriga, Maria (Universitat Ramon Llull. Departament de Ciències de l'Esport) ; Caserotti, Paolo (University of Southern Denmark. Department of Sports Science and Clinical Biomechanics) ; Blancafort Alias, Sergi (Universitat Autònoma de Barcelona. Fundació Salut i Envelliment) ; Santiago, Marta (Universitat Ramon Llull. Departament de Ciències de l'Esport) ; Rodriguez-Garrido, Sara (Universitat Autònoma de Barcelona. Fundació Salut i Envelliment) ; Weinmayr, Gudrun (Ulm University.Institute of Epidemiology and Medical Biometry) ; John-Köhler, Ulrike (Ulm University.Institute of Epidemiology and Medical Biometry) ; Wirth, Katharina (Ulm University. Agaplesion Bethesda Clinic) ; Jerez-Roig, Javier (Universitat Ramon Llull. Departament de Ciències de l'Esport) ; Dallmeier, Dhayana (Boston University School of Public Health. Department of Epidemiology) ; Wilson, Jason J. (Ulster University. Sport and Exercise Sciences Research Institute) ; Deidda, Manuela (University of Glasgow. Institute of Health and Well-Being) ; McIntosh, Emma (University of Glasgow. Institute of Health and Well-Being) ; Coll-Planas, Laura (Universitat Autònoma de Barcelona. Fundació Salut i Envelliment)