Table 9 Process of the three interventions: ProMuscle, ProMuscle in Practice and the ProMuscle Implementation Pilots

Planning and executing

▪ Researchers created a protocol and conducted the intervention according to it.

▪ Researchers created a protocol for conducting the intervention, based on the protocol of ProMuscle.

▪ Researchers trained professionals to conduct the intervention.

▪ Professionals adhered to the guidelines and adjusted the training intensity when necessary (too high/too low).

▪ Professionals could use the protocol of ProMuscle in Practice as an inspiration for conducting the intervention.

▪ Researchers trained professionals to conduct the intervention.

▪ Researchers discussed the protocol for implementing the intervention with professionals and discussed how this could be applied and adjusted to their specific setting.

▪ Basic elements of the intervention remained central, but there was room for own insights and adjustments according to available facilities/ resources and capabilities of individuals.

Engaging

▪ Researchers conducted the intervention themselves (i.e., providing training sessions).

▪ Managers of care organizations chose to be involved in the project and looked for physiotherapists and dietitians within their organization who were willing to practically conduct the intervention.

▪ Physiotherapists chose to be involved in the project and conducted the intervention themselves or instructed a colleague who was willing to be involved.

▪ Physiotherapists recruited dietitians to conduct the nutrition program of the intervention.

▪ A medical practice assistant of GP was involved to facilitate recruitment of participants.