HealthData VizAI

In Motion

I designed the program and the management system so trainers can use InBody devices well, and run training without the extra hassle.

Role: UX Design Intern (Project Lead)
Team: 2 UX Design Interns, 3 AI Engineer Interns, 3 Engineers
Year: 2023–2024
Status: Scaled nationally by InBody USA
Skills: UX Research, Interaction Design, AI Feature Design, Design Systems, Prototyping

The core first

Problem

$15,000 body composition devices sat unused. Trainers dropped fitness challenges that meant 30% more admin work.

Strategy

Cut trainer workload and make their impact easy to see, tied to members, not extra paperwork.

Impact

25% higher fitness challenge efficiency
93% faster setup (5 min → 20 sec)
Scaled nationally by InBody USA

Overview

How can we make gym members use our health devices?

Our goal was one clear path that would get gym members using our body composition devices across 30+ Southern California gyms within 3 months.

We wondered why devices so widely used in Korea went unused in the U.S.

Problem

$15,000 devices, gathering dust

InBody had put body composition analyzers on busy gym floors, and they still sat idle.

The only pattern that reliably moved usage was group fitness challenges, when trainers personally walked members through a scan. That same workflow, managed in spreadsheets, was burning trainers out.

Underutilized InBody analyzer beside stair climbers in a Southern California gym — * Underutilized InBody analyzer in a SoCal gym

Research

300+ members. Almost no one scanned alone.

I spent three months embedded at Gold's Gym, observing peak hours across 6 SoCal locations and interviewing 15 trainers.

95%

Did not use the device

5% used with trainers during group trainings

* Total members: 300+ (only 15 members used it)

Field research collage: InBody consultations, result sheets, gym floor, and group training equipment — * Field visits across SoCal gyms

Members

Felt uncomfortable scanning themselves in public and could not interpret the data without guidance.

Trainers

Wanted to run challenges, but recording results in Excel added roughly 30% to their daily workload, so most stopped.

Insight

To get members using the device, we had to get trainers on board first

Three things kept the loop stuck:

Member Accessibility Barrier

Members struggled to interpret the data without trainer guidance, creating dependency on already-busy trainers.

Time-consuming manual result management

Recording results in Excel increased daily workload by approximately 30%.

Low Motivation

The operational challenges caused trainer engagement to drop, diminishing use of body composition data.

Opportunity

Make device data feel like a benefit in trainers’ workflow

Ideation

How can we make fitness challenge more rewarding?

Trainers didn't need just another dashboard to learn.
They needed a tool that made them feel like strategic partners, not administrators.

Automated record-keeping reduced manual effort, but trainers needed a reason to initiate the process in the first place.

Trainer dashboard highlighting top performance and challenge journey beside a member on an InBody scan

Design Direction

From administrators to expedition partners

We treated trainers as partners. Their impact should be easy to see, and tied to what members actually do.

Solution

Automation that motivates, not just manages

Challenge Management

Trainers type a natural language prompt and the AI generates a structured schedule instantly. Setup dropped from 5 minutes to 20 seconds.

AI Challenge Creator

Rankings tied to Member Retention Rate, not activity alone. Gives trainers a direct line between effort and income stability.

Real-time Progress Dashboard

Weight change, body fat %, and scan frequency at a glance. No Excel. Saves 20+ minutes per trainer per week.

Proactive Coaching View

Historical health data and live challenge performance in one view. Trainers can identify and respond to a member's needs before they disengage.

Design System

One system across four platforms

Led the development of a cross-platform design system covering TV, kiosk, app, and web products.

Introduced a color token system to standardize colors across all platforms. Proposed a systematic naming convention for developers to reduce handoff time and improve workflow efficiency.

Results

Scaled nationally

InBody USA decided to scale the product nationally after the MVP. Fitness Challenge operational efficiency increased by 25%. Challenge setup time dropped by 93%. A/B testing validated the most effective feedback mechanisms for trainer engagement.

Learnings & Impact

This experience sharpened my design and leadership skills with AI!

Balancing company AI goals with user literacy

InBody wanted AI features to collect richer user data. Bridging business goals with users’ comfort around AI helped us shape a solution people could actually trust and use.

Designing for the people who run the gym

I started with InBody’s business needs. Gym staff showed me that taking care of the people in the room creates value for trainers, members, and the business.

Designer as Bridge Builder

Co-design sessions with developers and PMs taught me to translate field insights into actionable solutions. We bridge user needs with technical implementation.