Expert Validation of an Autonomous Personalized Physical Activity Algorithm

Study Phases - eDelphi Validation of the APPA Algorithm

Phase 1 - Round 1 (Initial Online Questionnaire):

The first phase consists of an online survey in which international experts in physical activity and exercise will evaluate the components of the personalized physical activity algorithm for health risk screening and individualized exercise prescription. Experts will assess the relevance, clarity, and clinical appropriateness of each item. Feedback from this round will identify items requiring modification or clarification.

Phase 2 - Round 2 (Re-evaluation):

The second phase consists of a consecutive online survey round, in which experts will re-evaluate the revised algorithm components based on feedback from Round 1. Experts will have the opportunity to adjust their ratings. This phase aims to move items closer to consensus (≥70% agreement).

Phase 3 - Optional Focus Group (if needed):

If consensus is not reached on specific items after Round 2, an online focus group will be conducted to discuss and resolve remaining disagreements. This discussion will help refine the algorithm and ensure agreement on all components.

Inclusion criteria

• Experts in Physical Activity and Exercise with recognized scientific or professional experience and a relevant doctoral degree.
• Availability to complete two rounds of the online modified Delphi questionnaire.
• Willingness to participate in an online focus group if consensus is not reached.
• Ability and willingness to provide informed consent.

Exclusion criteria

• Individuals unable to provide informed consent.
• Individuals without access to a computer, smartphone, tablet, or other internet-enabled device necessary to complete the online survey.