LiftBrain

Guides · updated 2026-11-13

Use Claude as your personal trainer

Claude is good at the parts of coaching that are about thinking: picking exercises around an injury, explaining why a lift stalls, balancing training with sleep and calories. What it lacks by default is memory of what you actually lifted.

Give it a workout log it can read, and it becomes a coach that checks in every week.

What a coach needs from you

  • Goal and deadline, if there is one (a meet, a holiday, a weight).
  • Training age and rough current weights.
  • Days per week, session length and equipment.
  • Injuries, and lifts you enjoy or hate.

With LiftBrain connected, Claude saves these to your profile, so you don't repeat them in every new chat.

Connect Claude to your workout log

  1. Create a LiftBrain account in the app.
  2. On claude.ai open Settings → Connectors → Add custom connector, name it LiftBrain and paste https://liftbrain.online/mcp.
  3. Press Connect and sign in. The connector also works in the Claude apps on your phone and computer.
  4. In a chat, make sure LiftBrain is switched on in the tools menu.

Prompts that work well

“Read my profile and last workouts, then write a 4-day upper/lower program for the next 6 weeks.”
“Analyse my squat and bench over the last month: estimated 1RM, volume, missed sets. Leave a note in the app and set my next weights.”
“I slept 5 hours and feel flat. Should I train heavy today? Check my health data.”
“Here's a photo of my dinner. Log it and tell me how much protein I still need today.”

What Claude can see, and what it can't

Through LiftBrain Claude reads your program, workouts, notes, food log, body weight and, if you allow it on the phone, sleep, resting heart rate, HRV and steps from Apple Health or Health Connect. It can't see anything else on your phone, and you can remove the connector at any time in Claude's settings.

Try it with your own assistant. LiftBrain is a free workout and food log for iPhone, Android and the web that Claude, ChatGPT and Gemini read and write. Connect it in two minutes →

Questions

Can Claude remember my workouts? Not reliably across chats on its own. With the LiftBrain connector it reads them from your log whenever you ask, in any chat.

Which Claude plan do I need? Custom connectors are available on claude.ai plans that support them; check Settings → Connectors. LiftBrain itself is free.

Is Claude better than ChatGPT for workout plans? Both write good programs. Pick the assistant you already use: LiftBrain works with Claude, ChatGPT and Gemini, and your log stays the same if you switch.

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