How it works
Tell Zena your goals, your equipment, and your current strength. Its AI builds a full program around exactly that — not a generic template pulled off a shelf.
Sleep, HRV, resting heart rate — read before every session, so the plan an AI wrote on day one keeps updating with you, not just sitting there unchanged.
Personal bests, working weight, and trend lines — tracked automatically, so progress is something you can see, not just hope is happening.
Import it — Zena adds the layer AI chat can't: recovery data, automatic progression, and a memory of every session.
Answer a few questions
Tell Zena your goals, your equipment, and your current strength. Its AI builds a full multi-week program around exactly that — not a generic template, not a copy-paste plan pulled from a database of one-size-fits-all workouts.
Where AI chat plans stop, Zena keeps going
A ChatGPT-written plan is frozen the moment it's generated — it has no idea how you slept, whether HRV is down, or if a lift has stalled. Zena reads sleep, HRV, resting heart rate, and a proprietary waking heart rate signal every day, so the plan adjusts with you, not just on the day it was written.
Get real-time feedback
See past performance, and get in-app reminders when you're ready to go up in weight — based on your actual performance and recovery data, not a script written weeks in advance.
AI that keeps learning about you. Not just AI that writes a document once.
Plenty of AI tools can write a workout plan in seconds now — that part is easy. The harder problem is week four, when your recovery has changed, a lift has stalled, or life got in the way for two weeks. Zena's AI doesn't stop at the plan — it keeps reading how training is actually going and adjusts accordingly.
Common questions
Most "AI workout planners" really just generate a document once and stop there — a list of exercises, sets, and reps that doesn't know anything about you after the moment it was written. That's a reasonable starting point, but it's not the same as a plan that actually keeps working as you train.
A tool that uses AI to generate a training program based on inputs like your goals, experience, and equipment — instead of you designing sets, reps, and exercise selection from scratch, or picking from a generic template.
A general chat AI can write you a plan, but it's a one-time document — it doesn't track what you actually lifted, and it has no way to know how you're recovering next week. Zena is built specifically to keep reading your training and recovery data after the plan is written, and updates it accordingly.
It depends on the tool. Plenty of "AI" planners still pull from a fixed library of programs and just swap a few variables. Zena builds around your specific goals, current strength, and equipment, and — from day one — factors in how you're recovering, not just what you typed into a form once.
A good one should. Zena reads sleep, HRV, resting heart rate, and a proprietary waking heart rate signal before each session, and gives a specific recommendation — push, ease off, or rest — rather than handing you the same numbers regardless of how you're actually doing.
Zena comes with a free 2 week trial, so you can generate your own program and see how it adapts before deciding if it's right for you.
Yes! If you've already got a plan from ChatGPT, a trainer, or a spreadsheet, import it — Zena adds the coaching and tracking layer on top: automatic progression, recovery-based adjustments, and a memory of every session.
The exercises and overall structure typically hold for a 4–6 week block. The details that should change more often — weight, reps, whether to push or ease off — should update every session based on how you're recovering, not wait for a full plan rewrite.
No leaderboards. No benchmarks against anyone else. Progress is measured against one person only — you.