Usage of the Tablet-Based “Keep On Keep Up” Digital Program and Resulting Changes in Physical Capacity and Real-World Walking in Community-Dwelling Older Adults: Process Evaluation

Melissa J Böttinger   ^{1, 2 *} , MSc ;   Marios Stefanakis   ^{1, 2, 3 *} , MSc ;   Tobias Eckert   ^{1, 2} , Dr phil ;   Carl-Philipp Jansen   ¹ , PD Dr phil ;   Elena Litz   ^{1, 2} , MSc ;   Anastasia Bredenbrock   ² , BSc ;   Sabato Mellone   ⁴ , Prof Dr ;   Leon Radeck   ⁵ , Dr rer nat ;   Anna-Lena Schubert   ⁶ , Prof Dr ;   Tim Fleiner   ^{3, 7} , Prof Dr ;   Simon Steib   ^{2, 8} , Prof Dr ;   Emma Stanmore   ^{9, 10, 11, 12} , Prof Dr ;   Chris Todd   ^{9, 10, 11, 12} , Prof Dr ;   Jürgen M Bauer   ^{1, 2} , Prof Dr ;   Clemens Becker   ^{1, 2} , Prof Dr ;   Katharina Gordt-Oesterwind   ^{1, 2, 8 *} , Dr phil

¹ Geriatric Center, Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany

² Network Aging Research, Heidelberg University, Heidelberg, Germany

³ Institute for Geriatric Research, Ulm University Medical Center, Ulm, Germany

⁴ Department of Electrical, Electronic and Information Engineering "Guglielmo Marconi", Università di Bologna, Bologna, Italy

⁵ Institute for Computer Science, Heidelberg University, Heidelberg, Germany

⁶ Department of Psychology, Johannes Gutenberg University Mainz, Mainz, Germany

⁷ Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany

⁸ Institute of Sports and Sports Sciences, Heidelberg University, Heidelberg, Germany

⁹ School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom

¹⁰ National Institute for Health and Care Research, Applied Research Collaboration – Greater Manchester (NIHR ARC-GM), Manchester, United Kingdom

¹¹ Manchester Academic Health Science Centre, Manchester, United Kingdom

¹² Manchester University NHS Foundation Trust, Manchester, United Kingdom

*these authors contributed equally