Exercise Tracker Device Design

I’m developing a new health & fitness electronic device focused specifically on exercise tracking. I need a product designer who can take this idea from concept to a presentation-ready package.

Here’s what I expect:
• Initial concept sketches showing form factor options sized for wrist-worn comfort.
• A refined 3D model (STEP or STL) that communicates how the enclosure houses common sensor modules and a small display.
• Basic exploded views or call-outs that indicate proposed materials, button placement, charging port, and strap mechanism.
• Brief usability notes: how the user starts/stops a workout, views metrics, and charges the unit.
• Rendered hero images suitable for stakeholder decks.

If you have experience designing compact wearables, integrating off-the-shelf IMU or heart-rate sensors, and can work iteratively based on feedback, I’d love to see examples of your previous work and hear your proposed workflow.