Table 1.

Hypothetical interventions proposed in the questionnaire

Intervention type	Content of hypothetical intervention
Physical exercise intervention	The physical exercise intervention consists of three exercise sessions (30 minutes) per week. The participants perform exercises to strengthen the muscles, improve their balance, and increase their flexibility. In addition, participants will walk twice a week for 30 minutes. These exercises are personalized to the individual ability of the participants
Nutritional intervention	In the nutritional intervention, participants take protein supplements three times a day (breakfast, lunch, and before bedtime). In addition, a vitamin D and calcium supplement will be taken once daily