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Table 1 Operationalization of Self-determination theory and Feedback-Intervention model constructs within the SMART-STEP application

From: Development, implementation and evaluation of a smartphone application aimed to reduce sedentary time and increase physical activity among Indian sedentary office workers – findings from SMART-STEP trial

Theoretical model and constructs

Features embedded in the SMART-Step

Self-determination Theory

Autonomy

• Prompt flexibility

• Can skip the prompts based on task priority

Competence

• Achievable desk-based exercises

• Visual progress tracking

Relatedness

• Embedding prompts in ways that did not disrupt the office environment

Feedback-Intervention Model

Feedback

• Feedback causing shifting attention from work to performing movement break

Task learning

• Displaying simple callisthenic exercises every time the participant login to learn the exercise

Task motivation

• Hourly reminders of exercises displayed at the home page of the Smartphone screen

Meta-task

• Color coded (engaged > 4 prompts, green—good; engaged < 2 prompts, red – bad) provides motivation to perform more exercise breaks