Train smarter.
Engineer your body.
Gymmy is James Harrison's personal fitness platform — real training data, an AI coach grounded in exercise science, and tools powerful enough for your own journey.
25+
Years Training
100%
Natural
NPC
Competitor
GPT-4o
AI Coach
What is Gymmy?
One athlete's real journey. One platform built around it.
Gymmy isn't a generic fitness app. It's a window into how James Harrison — a natural NPC competitor, NSCA-CPT candidate, and AI consultant — actually trains, eats, and prepares for competition. And it's open for you to use.
Real workout data
Every workout James logs in Hevy appears here automatically. No curation, no filters — raw training reality.
Evidence-based AI coach
Ask the AI coach anything. It knows your current weight, today's macros, your competition timeline, and James's training.
Your data too
Connect your own Hevy account and track your journey alongside James. Toggle between his data and yours at any time.
Good morning
James Harrison
Calories
2,148
/ 2,400
Protein
187g
/ 220g
Weight
179.2
lbs
Today's Training
Push A — Chest & Tris
7 exercises · 68 min · Hevy synced
Platform Features
Everything, in one place
Six integrated tools built for evidence-based athletes who want more than a simple workout log.
Your daily command center
The Log page is where everything comes together. See today's training, log your weight and macros, track your competition countdown, and get a snapshot of your week in one view.
- Morning check-in: weight, macros, and today's workout in one card
- Competition countdown with smart phase labels (peak week, final month, etc.)
- Macro logging with your personal calorie and protein targets
- Toggle between James's data and your own at any time
Good morning
James Harrison
Calories
2,148
/ 2,400
Protein
187g
/ 220g
Weight
179.2
lbs
Today's Training
Push A — Chest & Tris
7 exercises · 68 min · Hevy synced
Ask anything. Get answers grounded in science.
Gymmy uses GPT-4o with a context window that includes your current weight, today's macros, competition timeline, Hevy status, and any custom coaching context you set in Settings. Not bro science — exercise science.
- Knows your live data: weight trends, macro progress, days to show
- Classifies every answer as [EVIDENCE-BASED], [FROM EXPERIENCE], or [EXPERIMENTAL]
- Upload docs, spreadsheets, or meal plans for deeper analysis
- Supports follow-up questions with full conversation memory
Am I eating enough protein for my cut at 87 days out?
[EVIDENCE-BASED]
At 179 lbs you're hitting 187g — that's 1.04g/lb, solidly in the 0.8–1.2g range for muscle preservation during a deficit. You're on track. Focus on keeping strength stable over the next 4 weeks.
Real training data, not highlights
Every workout James logs in Hevy syncs automatically within minutes. See every set, rep, and weight. No curated feeds — this is the actual program, the missed lifts, the PRs, and the off days.
- Live Hevy sync — workouts appear as soon as they're logged
- Full exercise breakdown: sets, reps, weights, rest times
- View routines and programming splits
- Connect your own Hevy account to track your workouts side-by-side
James's Workouts
Live from HevyPush A — Chest & Tris
7 exercises · 68 min
Legs — Quad Focus
8 exercises · 74 min
Pull B — Back & Bis
7 exercises · 61 min
Track your transformation with evidence
Progress isn't about scale weight alone. The Progress page surfaces body weight trends, circumference measurements, progress photos, and chart overlays so you can see the full picture over any time range.
- 7d / 30d / 90d weight trend charts
- Circumference tracking: waist, chest, arms, hips, thighs
- Side-by-side progress photo comparisons
- Weekly check-in history with notes
Body Weight
-6.8 lbs
over 90 days
Built for show prep from day one
The Prep section is purpose-built for competitors. Set your show date and competition name, and the platform enters prep mode — tracking peak week timelines, depletion phases, and carb-loading windows automatically.
- Countdown with intelligent phase labels (peak week, final month)
- Prep-specific macro targets for water and sodium manipulation
- Weekly check-in schedule with photo uploads
- AI coach responses shift based on proximity to show
Days Until Show
87
NPC Natural Nationals 2025
How It Works
Up and running in under two minutes
No credit card. No required signup. Start with James's data, switch to yours whenever you're ready.
Explore without signing up
Hit Open App and you land on the Log page viewing James's real training data — weight logs, macro snapshots, today's Hevy workout, and progress charts. No gate, no paywall.
Sign up to track your own data
Create a free account to unlock personal data. Your weight logs, macros, measurements, and progress photos stay completely private. James's data is always available as a reference.
Connect your Hevy account
Go to Settings, add your Hevy API key, and your own workouts start syncing automatically. Toggle between your training and James's in a single click from the top nav.
Customize your AI coach
Set your goals, competition date, macro targets, and coaching context in Settings. Every message you send to the AI coach uses this live context to give you personalized, data-driven answers.
Who is Gymmy for?
Different goals. Same platform.
Find the path that matches where you are right now.
The Follower
No account needed
You want to see how a natural competitor actually trains, eats, and preps — with no filter.
- Browse James's workouts daily
- Read competition prep updates
- Follow the weight trend live
- Access the AI coach immediately
The Competitor
Most relevant
You're prepping for a show and want to use a platform built by someone who's done it.
- Set your show date and get a countdown
- Comp-specific macro targets
- Peak week planning tools
- AI coach trained on prep science
The Self-Tracker
Connect your data
You want to use Gymmy for your own training journey with James's data available as a benchmark.
- Connect your Hevy account
- Track weight and macros
- Upload progress photos
- Use AI coach with your context
Setup Guide
Configure once. The AI coach remembers everything.
Fill in your profile, goals, and integrations to unlock the full platform.
Profile
Name, age, height, weight, and fitness level. This personalizes AI coach responses and UI labels throughout the app.
Nutrition Targets
Set your daily calorie and macro targets. The Log page tracks your progress against these in real time.
Competition
Add your show name and date. The entire platform enters prep mode — countdown timers, phase labels, and AI coach responses all update automatically.
Goals & Coaching Context
Write free-form coaching goals. These are injected directly into every AI coach session so responses are always anchored to what matters to you.
Hevy Integration
Paste your Hevy API key to start syncing your own workouts. Takes 30 seconds. Your data remains completely private.
Preferences
Unit preferences (imperial / metric), notification settings, and data viewing mode defaults.
Currently training for
NPC Natural Nationals 2025
100% Natural
About James
Built by an athlete who got tired of guessing.
James Harrison has been training for over 25 years. After decades of trial and error — and a lot of bad advice — he started building the tools he actually needed: a platform that combines his real training data with AI capable of reasoning about it.
He's an NPC natural competitor currently prepping for nationals, an NSCA-CPT candidate, and an AI consultant who builds client-facing AI products professionally. Gymmy is the intersection of all three.
Everything on this platform is real. The weight logs are his actual weigh-ins. The workouts are from his Hevy account. The macro targets are what he's actually eating. This is how he trains — and he built the app to show it.
FAQ
Common questions
QDo I need to sign up to use the app?
No. You can browse all of James's data — workouts, weight logs, macros, progress — without creating an account. Sign up only when you want to save your own data.
QIs Gymmy only for bodybuilders or NPC competitors?
Not at all. It's useful for any evidence-based athlete — powerlifters, general fitness, or anyone who wants to track training data alongside an AI coach. The competition features are optional.
QWhat is Hevy and do I need it?
Hevy is a free workout tracking app. James logs all his training there, which syncs to Gymmy automatically. You don't need Hevy to use Gymmy — but if you want your own workout data to appear here, you connect your Hevy API key in Settings.
QHow does the AI coach work?
The coach is powered by GPT-4o via the Vercel AI Gateway. Every session is primed with a system prompt that includes your current weight, today's macros, competition timeline, Hevy connection status, and any custom coaching goals you've written in Settings.
QIs my personal data private?
Yes. Your weight logs, macros, photos, and measurements are only visible to you when logged in. James's data is publicly visible by design — he's made it available as a reference for the community.
QIs Gymmy free?
Yes, currently free. James built this as his personal platform and as a showcase for AI-integrated fitness tooling. If it grows into a coaching product, pricing will be introduced transparently.
Newsletter
Follow the journey as it happens
Weekly updates: competition prep progress, new features, evidence-based training deep-dives. No spam.
Start training smarter today.
No signup required. See James's real training data, chat with the AI coach, and decide if you want to track your own journey alongside it.