Auto Coach fits your life
Your goals, time, training history and preferences help shape your plan. Review suggested changes as life changes; you stay in control.
Sports science for real life
Your life. Your data. Smarter training.
AI-powered endurance coaching for runners, cyclists and everyday athletes. Build better training from your own data. No blood testing or lab required.
30 days of Pro free · No card · No automatic charge · Basic from £4.99/month
What is Lactate Training? An endurance training app that helps make data and sports science useful—not a blood-testing service.
Set up unlimited WhatsApp & edit-access Claude/ChatGPT →
Works withGarminStrava
Not a blood-testing service
Sports science. For everyday athletes.
Training zones, without the lab
Use heart rate, pace and power to help estimate training intensities. A blood lactate test is optional, never required.
Your data becomes direction
Understand sessions, compare progress and make better training decisions, with feedback grounded in your own data.
Why lactate? How our bodies produce, transport and use lactate matters in endurance sport. Appropriate training intensities help build aerobic capacity and endurance—but Lactate Training does not measure your blood lactate without a test. It uses your existing data to guide estimated zones and training decisions.
Your training, coached around real life
Meet Auto Coach. A plan that can adapt when life does.
Tell it your goal, your available time and what matters to you. Auto Coach uses your recent training and feedback to help plan future sessions and suggest adjustments when your week changes.
You stay in control. Review suggested changes and choose whether to apply them yourself, approve recommendations or use Full auto mode. A plan isn't useful if it ignores your life.
How Auto Coach works →
From goal to a training week that fits.
- Tell it your goal. A first 5K, a faster marathon, or simply consistent training.
- Set your constraints. Work, family, available days, recovery and preferences.
- Review your plan. Adjust future sessions when time or circumstances change.
- Learn from each session. Add feedback and see why Auto Coach suggests changes.
Small startup. Built by an athlete.
Self-funded. Built around real lives, not perfect training schedules.
I'm Barney. I'm a runner, a dad of two and I work full-time. I started Lactate Training because data and sports science shouldn't be reserved for professionals or people with a lab.
We're an independent, self-funded startup, building something useful for people with jobs, families and goals. Your ideas and feedback genuinely shape what comes next.
Your life. Your data. Your app.
Train anywhere. Take action anywhere.
Not just read-only AI. Actually edit and plan your training.
Connect Claude or ChatGPT with MCP edit access and ask it to create and change future calendar sessions, plan ahead, update questionnaires, coaching memory and coaching style. That's the difference from a read-only data connection: it can make changes, not just describe your training.
WhatsApp · Available during your free trial and on paid plans
Unlimited coaching in WhatsApp
Ask questions, check in or report how a session went, straight from WhatsApp. Coaching messages don't use your in-app question/report allowance.
- Open WhatsApp AI Chat on the Lactate Training homepage in the app.
- Enter your WhatsApp number and tap Link my WhatsApp.
- When linked, tap Open WhatsApp chat and send your first message.
MCP integration · Basic, Pro and Max
Claude & ChatGPT: view AND edit
Your connected AI can go beyond reading session and Garmin health data: edit future workouts and plans, manage calendar and coaching information, and update your memory and coaching preferences through supported actions.
- In the app, go to Settings → Claude and ChatGPT integration.
- Select Create edit link (not the read-only link), then copy it.
- Add the link as a custom connector in Claude or an app/connector in ChatGPT, then ask it to make a change.
Important: WhatsApp coaching is available during the eligible 30-day free trial. Claude/ChatGPT MCP editing requires an active paid Lactate Training plan, starting with Basic at £4.99/month; any external Claude/ChatGPT subscription is separate. Always review edits made through an AI connector.
See what your data means
Finished a run and not sure what it meant?
See what went well, what to watch, and what to do next. All based on your training and your goal.
Session Analysis
Example session review
Threshold Intervals
Tuesday · 6 × 4 min · Zone 4 · 52 min
You kept the same pace in all six efforts. You are running 4 seconds per km faster than six weeks ago.
Your heart rate rose in the last two efforts. You may still be tired from Sunday’s long run.
Keep Thursday easy. You are on track for your half-marathon goal.
Real reviews
Not sure it works? Hear from real athletes.
Awesome App for every level of athlete. It links to your Garmin data seamlessly and helps to break down all of the data it...
Read full review
Awesome App for every level of athlete. It links to your Garmin data seamlessly and helps to break down all of the data it chucks out, giving you a deep layer of insight after every session. Its like having a coach at your disposal whenever you need it. im currently smashing my goals due to this App.
I always considered having a coach, but I’m not committed enough to invest in that. This app is perfect in the absence of a...
Read full review
I always considered having a coach, but I’m not committed enough to invest in that. This app is perfect in the absence of a coach.
I’ve found this app super helpful for structuring my run training. It gives way more detail and 2-way interface than competitors such as Runna...
Read full review
I’ve found this app super helpful for structuring my run training. It gives way more detail and 2-way interface than competitors such as Runna (which I think is good for beginners but is so limited). I thoroughly recommend to anyone wanting support with their training. I guarantee you’ll see progress.
30 days of Pro FREE · No payment details
Try Pro free for 30 days. Keep Basic for £4.99.
Basic includes unlimited WhatsApp coaching, AI session analysis, Auto Coach and the ability to view and edit your data, future sessions, questionnaires, memory and coaching style through Claude or ChatGPT. More AI usage with Pro or Max.
30 days of Pro free. No card. No automatic charge.
After your trial, choose Basic for £4.99/month with unlimited WhatsApp coaching, upgrade for higher AI limits, or stay on Free. See all plan details.
Register for WhatsApp during your trial, or activate Claude/ChatGPT MCP editing once you're on a paid plan.
Compare all plans, features & monthly limits →
Free, Basic, Pro and Max — full breakdown with every allowance
Free
£0/month
Keep your training organised with a small free AI allowance. No payment details.
- Training calendar and planning
- 2 AI coach questions each month
- 2 AI reports each month
See all features
- 2 daily check-in responses each month
- New Garmin/Strava connections require a trial or paid plan
Basic
£4.99/month
Most coaching features. Unlimited WhatsApp. £4.99/month after the free trial.
- Unlimited WhatsApp coaching messages
- View and edit training with Claude & ChatGPT
- Auto Coach, session analysis, dashboard and memory
See all features
- 50 coach questions and reports combined/month
- Edit future sessions, questionnaires and coaching style
- Lite and Legend training plans
- Grill Me (15/month)
- Send Garmin workouts (8/month)
- Talk to your coach (4 conversations/month)
- Session comparisons and weather
- Training insights and health views
- Manage your training calendar
- Automatic session names and short summaries
- Daily AI check-ins (31/month)
Pro
£9.99/month
All Basic features with higher monthly AI limits. £9.99/month.
- Everything in Basic, including unlimited WhatsApp
- View and edit data via Claude or ChatGPT
- 50 coach questions and 50 reports each month (separate)
See all features
- Auto Coach: 30 plan builds/rebuilds/month
- Grill Me: 60/month
- Send workouts to Garmin: 31/month
- Live voice: 15 minutes/day
- Lite plans: 10/month; Legend plans: 10/month
- Session comparison, dashboard and weather
Max
£14.99/month
Highest usage limits plus Coach Mode for managing athletes. £14.99/month.
- Everything in Pro, including unlimited WhatsApp
- View and edit training with Claude or ChatGPT
- 1,000 coach questions and 1,000 reports/month (separate)
See all features
- Coach Mode: manage connected athletes
- Auto Coach: 60 plan builds/rebuilds/month
- Grill Me: 120/month
- Send workouts to Garmin: 100/month
- Live voice: 30 minutes/day
- Lite plans: 20/month; Legend plans: 20/month
Compare all features, voice limits and monthly allowances
Cancellations, refunds & contact · Set up WhatsApp · Set up Claude/ChatGPT edit-access MCP
Still got questions?
How does the 30-day trial work?
Eligible new athletes get 30 days of Pro-level app features free, with no payment details and no automatic charge. When the trial ends, choose Basic for £4.99/month, Pro, Max or remain on Free. External Claude/ChatGPT integration requires a paid plan.
What if my session analysis shows an error?
Hit Refresh, then report the problem. A failed analysis does not use your monthly AI report allowance. Email barney@lactatetraining.ai if it continues.
How do I cancel, request a refund or contact Barney?
No card is required for the free trial. After subscribing, you can cancel through Apple or Google. See our Cancellations, Refunds & Contact page, or email barney@lactatetraining.ai.
What sports does Lactate Training support?
The app is built for endurance training, including running, cycling and triathlon. Ask us if you are unsure about your sport.
What devices and apps does it sync with?
Connect Garmin or Strava. Other devices can provide activities through Strava where that route is supported. The data available depends on your device and permissions.
Less guesswork. More legendary training.
Get the app, create your account and try 30 days of Pro free. No card needed. Cancel any time.
30 days of Pro free · No card · No automatic charge · Basic from £4.99/month