Get admin time back for coaching with NexRex
Rex, your AI training assistant, handles the routine so you can focus on what matters — coaching athletes.
Good morning, coach.
Three athletes need a look today — I'd start with Sarah. Ask me anything, or pick up where you left off.
Adherence, HRV, sleep, mood, RPE and completed load in one place. Rex doesn't trust a single metric, because single metrics lie.
A risk score and a recovery score for every athlete, every day — calibrated per athlete, not against the team average.
Red: respond today. Yellow: track this week. Green: leave them alone. Scan 100 athletes in seconds, miss none.
Rex flags who needs you,
before it becomes a problem.
Every athlete scored each morning on risk and recovery — so your attention lands where it counts.
From raw signals to the right message.
Rex ingests every training signal, scores it overnight, and turns the pattern into a check-in worth sending — no dashboard-watching required.
Wearable signals — activity, heart rate, sleep, nutrition, recovery — plus coach observations and each athlete's weekly feedback, pulled together continuously.
Athletes assess their own training status and share feedback, continuously updating Rex's memory of each runner.
A weekly summary, a check-in draft, an athlete insight report and live training-plan adjustments — in your voice, ready before you'd have noticed.
See your whole team in 90 seconds
Rex sorts athletes who need attention, are losing momentum, or deserve recognition into one concise email. Scan the priorities, then decide who to contact today.
12 athletes need your attention this week
Hi coach, here is your 90-second team brief for the week.
One or more warning signals suggest a proactive check-in this week.
- Sleep score is 28% below personal baseline
- Missed 3 planned workouts
- HRV is 19% below the 7-day baseline
- Flagged by Rex with high confidence
Recent activity is well below their usual pattern, so a light nudge may help.
- 0 runs this week, versus 5.5 per week recently
- Last activity was 8 days ago
Meaningful progress this week deserves positive reinforcement.
- Plan adherence sustained for 5 weeks
- Rex suggests a positive check-in
Sample data. All names have been anonymized.
Plan a week in minutes, not hours
Rex understands your coaching philosophy and builds periodized plans tailored to each athlete's goals and fitness — review, tweak, and publish.
Every athlete, visible at a glance
Spot who needs attention — missing plans, injury risk, broken streaks. Recent trends, load and race countdowns on one page, no clicking required.
Talk to athletes in your voice
Message athletes directly on the platform — no context-switching. Conversations stay in the system, giving Rex richer context for sharper suggestions.
The full picture, per athlete and group
Distance, load trends, recovery state, plus CTL, ATL and TSB. Rex auto-flags athletes who need extra attention — no scrolling through every profile.
Three steps to scale
Connect your athletes
Invite athletes via deep link. They download the app and connect instantly. No spreadsheets, no manual onboarding.
Train Rex your way
Rex learns your philosophy, communication style and methodology. It becomes your voice, your assistant.
Coach at scale
Rex handles daily check-ins, post-workout summaries and weekly recaps. You focus on the athletes who need you most.
Latest from the NexRex team
View all articlesHow NexRex remembers you
At the 2017 Chicago Marathon my watch logged every kilometer, but not the gel that made me sick. This post covers what NexRex's AI assistant Rex remembers, and why not everything needs to be remembered.
I hit BQ — and the door still closed
Twice I ran a Boston qualifier and still got cut. From Joey’s last ten kilometers beside me to wanting Rex to be every runner’s teammate.
Connect NexRex to Grok Bot: give your AI assistant real training context
Paste the NexRex MCP URL into Grok Bot, approve OAuth, and query real training context—AI drafts; you decide.
Frequently asked questions
During onboarding, Rex asks about your methodology and communication preferences. As you review and adjust its drafts, it refines its understanding — within 2–3 weeks, Rex sounds authentically like you.
Yes — Rex always identifies itself as an AI training companion and never pretends to be human. Because it speaks in your coaching voice and defers to you on complex calls, athletes experience it as an extension of your coaching.
Data is encrypted in transit and at rest, and Rex uses it only to coach. Athletes can see, edit, delete, and export everything Rex remembers about them, and they control what's shared with coaches.
Yes. The Starter plan is free forever for up to 5 athletes — no credit card, no time limit. When you're ready for Rex AI and the advanced features, the Coach plan includes a 30-day free trial.
TrainingPeaks and Everfit are excellent planning tools. NexRex goes further with Rex, a persistent AI assistant that organizes training signals, prepares briefs, and drafts check-ins so coaches can spend more time on judgment and relationships.
Ready to coach at scale?
Join the coaches who are transforming how athletes train.