AI coach

The NexRex AI coach answers training questions, explains your plan, and reviews each activity you complete.

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Ask anything

Open the coach chat to ask about pacing, recovery, race strategy, or why a workout is on your calendar.

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Post-run insights

After an activity syncs, NexRex generates a short read on how it went — effort, pacing, and what it means for upcoming sessions.

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Workout drafts in chat

When you ask Rex to build or adjust a workout in chat, the reply now appears as a structured workout-draft card directly inside the conversation instead of plain text. The card gives you a scannable preview of what Rex came up with before anything is saved to your plan. Each card shows:

• A title and short subtitle summarising the session.
• A status pill — for example Draft, Review, Ready, or Error — so you can tell at a glance whether Rex still needs input.
• Nested workout blocks with steps, durations, distances, and rounds for any repeats.
• Session totals, so you can see overall duration and volume without expanding every block.

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Clarifying an ambiguous request

If Rex isn’t sure how to interpret part of your request — for example whether “4 × 1k” should be at threshold or interval pace — the card surfaces an ambiguity panel with tappable choice chips. Pick the option that matches what you had in mind and Rex updates the draft in place.

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Fast and Pro models

Rex offers two response models you can switch between from the app bar in the Rex chat tab: Fast and Pro. Fast is optimized for quick replies; Pro uses a more capable model for deeper reasoning on complex questions — planning tweaks, race strategy, or interpreting several weeks of training at once.

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Choose a model

1. Open the Rex tab in chat (the model selector doesn’t appear on the direct-message conversation with your human coach).
2. Tap the model name in the app bar — Fast or Pro.
3. Pick the option you want. Your choice is remembered across sessions and applies to every message you send until you change it again.

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Who gets Pro

Pro is a Pro-subscription feature and is also available to coaches on any active plan.

• Coaches and Pro subscribers default to Pro and can switch to Fast at any time.
• Everyone else defaults to Fast. The Pro option is visible but locked with a PRO badge — tapping it opens the standard subscription paywall instead of switching the model.

If your Pro entitlement lapses, Rex automatically falls back to Fast on your next message, even if Pro was your last saved choice. Re-subscribe and Pro becomes selectable again.

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Choose your AI coach

If your coach has published one or more AI coach agents to your organization, you can pick which one answers you in chat. The picker is only visible when that catalog is available for your org — otherwise the entry stays hidden and Rex uses the default coach automatically.

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Open the picker

1. Open the NexRex app.
2. Go to Settings.
3. Tap AI 教練 (AI Coach).

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What you’ll see

The screen lists every AI coach agent your organization has published, plus a built-in Default AI Coach option at the top. Each entry shows the agent’s display name, a short summary, its coaching style, and any specialties the coach tagged it with. The currently selected agent is marked so you can tell at a glance which one you’re chatting with. If the list can’t load, you’ll see AI coaches are unavailable right now. Please try again later. instead of an empty screen.

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Switch coaches

1. Tap the agent you want to use.
2. Wait for the confirmation snackbar (AI Coach updated to <name>).

The selection only changes after the save completes. If the save fails, your previous coach stays active and you’ll see an error snackbar — nothing changes until a save succeeds.

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Default AI Coach

Picking Default AI Coach clears your personal choice. Chat then falls back to whichever agent your organization has set as its default, or to the generic NexRex coach if no organization default is configured. Use this if you want to follow whatever your coach rolls out next without re-picking each time.

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Rex’s Memory

Rex’s Memory is the editable store of durable facts your AI coach remembers about you — goals, injuries, preferences, lifestyle constraints, and similar context that should outlast a single chat. Editing this list changes how Rex coaches you going forward.

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Open Rex’s Memory

1. Open the NexRex app.
2. Go to Settings.
3. Tap Rex’s Memory.

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What you’ll see

Memories are grouped by category — for example Goals, Injury, Preferences, Lifestyle, Communication, Equipment, Race context, and Notes. Each row shows:

• The memory text.
• A provenance badge indicating who added it:
  • You — you added it yourself.
  • Coach — your coach added it.
  • Rex — Rex picked it up from your chats.
• A last-updated label so you can tell how fresh each entry is.

If Rex hasn’t learned anything durable yet, you’ll see an empty state inviting you to keep chatting or add a memory yourself.

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Add a memory

1. On the Rex’s Memory screen, tap Add memory.
2. In the bottom-sheet form, pick a Category and type the Memory text (for example, Prefers morning runs before work).
3. Tap Save.

The new entry appears under its category with a You badge.

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Edit a memory

1. Tap the memory you want to change.
2. Update the category or text in the bottom-sheet form.
3. Tap Save.

The row’s last-updated label refreshes to reflect your change.

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Delete a memory

1. Swipe the memory row from right to left.
2. Confirm Forget in the dialog that appears.

Choosing Cancel keeps the memory and slides the row back into place. Once forgotten, Rex no longer uses that fact when coaching you, but you can always add it back later.