Jason Xie · ISSA-certified trainer

A free guide to building a training and eating plan around your own body — with ChatGPT as your coach.

For beginners who've tried a program or an app and it didn't stick. I had nobody to ask, so I spent ten years asking my own body. This guide gives you the exact questions to ask an AI so it builds a plan around you — not a template — and adjusts it every month from your numbers.

Get the free guide Or coaching with me directly →

The Zero-to-One Handbook cover — The Zero-to-One Handbook · by Jason Xie, ISSA certified

How it works

Three steps. Then repeat every month.

01Answer the questions — your body, your food, your schedule.
02Paste them into ChatGPT (or Claude, Gemini). It builds your plan.
03Log a few numbers a day. Once a month, check in and adjust — or change nothing.

Ten years. One body. No shortcuts.

Every one of these taught me something I can now share.

Where I started, 150 lbs, age 15 — 150lbsWhere I startedAge 15

The mid transformation, 170 lbs, age 16 — 170lbsThe mid transformationAge 16

The first major transformation, 185 lbs, age 18 — 185lbsThe first major transformationAge 18

After time away, 175 lbs, age 19 — 175lbsAfter time awayAge 19

Lockdown, 220 lbs, age 21 — 220lbsLockdownAge 21

Back in the gym, 195 lbs, age 22 — 195lbsBack in the gymAge 22

The second major transformation, 220 lbs, age 23 — 220lbsThe second major transformationAge 23

Before any of it

Who I am

Hi, I'm Jason.

My name is Jason. I was the skinny one — always. The kid who ate everything and stayed a stick.

I came to Toronto alone at 15 — barely spoke English, no guidance, had to figure everything out myself. I landed on bodybuilding with zero idea what I was doing in the gym.

There was no guide available, so I did it the only way I knew — try something, run it, watch what my body said back, adjust. Ten years of that. Eight of them actually training. All natural: protein powder and creatine, nothing else.

I built to my biggest, lost it during lockdown, cut it back down, and built again. Every phase taught me the same thing: the plan was never the hard part. The hard part was knowing which question to ask next, how to track and stay consistent, what and when to adjust.

What transfers isn't my program — your body is different. It's the questions, in the order that works.

The credential

ISSA certified personal trainer certificate

I'm a certified personal trainer through the International Sports Sciences Association.

A free guide to building a training and eating plan around your own body — with ChatGPT as your coach.

Three steps. Then repeat every month.

Ten years. One body. No shortcuts.

Hi, I'm Jason.

Want me in the loop?