> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nexrex.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Welcome to NexRex

> AI-powered marathon training for runners and the coaches who guide them.

NexRex is a marathon training platform that pairs every runner with an AI coach,
adapts training plans to real-world performance, and gives human coaches the
insights they need to manage a full roster.

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Get from sign-up to your first guided run in a few minutes.
  </Card>

  <Card title="Connect a device" icon="watch" href="/athletes/connect-device">
    Sync Garmin, Strava, and Apple Health so NexRex sees every activity.
  </Card>

  <Card title="For coaches" icon="whistle" href="/coaches/overview">
    Manage athletes, build group plans, and act on athlete insights.
  </Card>

  <Card title="Plans & billing" icon="credit-card" href="/account/subscriptions">
    Trials, subscriptions, and how licensing works for teams.
  </Card>
</CardGroup>

## Who NexRex is for

<CardGroup cols={2}>
  <Card title="Runners" icon="person-running" href="/athletes/training-plans">
    Adaptive training plans, an always-on AI coach, and insights after every run.
  </Card>

  <Card title="Coaches" icon="clipboard-list" href="/coaches/manage-athletes">
    A single console to monitor athletes, assign plans, and intervene early.
  </Card>
</CardGroup>