Wearable Fitness Trackers (WFTs) have become a common tool for evaluating and encouraging healthy lifestyles. However, their success in driving sustained behavioral change is still limited.

Our research suggested that inactive individuals often struggle with knowing how, when, and where to increase their physical activity.

To better understand the design challenge, we conducted secondary research focusing on factors that influence healthy lifestyle adoption.

• Motivation
• Mindset
• Behavior nudging techniques
• Habit formation

We focused on desk workers since they often face barriers to physical activity such as time, energy, and motivation.

To validate our research, we interviewed six adults working full-time jobs to understand their routines and past relationships with exercise.

We organized interview insights using affinity diagramming to identify patterns and user pain points.

Time constraints and environment emerged as the primary barriers preventing users from staying active.

Inspired by the concept of a 21-day habit challenge, we explored strategies that motivate users to build consistent habits through small daily exercises.

The concept eliminates barriers by designing activities that require no equipment and can be done anywhere.

The application guides users through short daily exercises while rewarding progress with visual feedback.

A growing tree metaphor was introduced to represent progress and encourage consistent engagement.

We conducted usability testing to evaluate whether the 21-day challenge concept motivated users to engage with the application.

The tests focused on clarity of instructions, navigation flow, and whether the reward system encouraged continued use.