Your goal predicted race time is designed to be dynamic and responsive to your actual performance. While it adjusts gradually based on your training data, there are two key moments when it can change more significantly: performance tests and unexpected PRs.
Performance Tests Drive Prediction Updates
Performance tests are one of the primary ways REN recalibrates your predicted race time.
What happens during a performance test:
- You complete a performance test like a Critical Speed calibration test
- REN analyzes your performance and updates your training zones
- If your thresholds improve, your predicted race time becomes faster
- If your thresholds decline (due to fatigue or detraining), your prediction may become more conservative
Why this matters:
- Performance tests give REN direct insight into your current fitness level
- They provide objective data that goes beyond day-to-day training variability
- Your training zones and race predictions are synchronized, ensuring consistency across your plan
PRs Between 20 Minutes and 3 Hours Reveal Progress
Setting a new personal best in this time range can also trigger a prediction update—even if it wasn't a scheduled test. That way you get an updated Critical Speed threshold, that leads (after accepting) to an improved race prediction time.
Why PRs in this range matter:
- These efforts (roughly 5K to marathon distance) are strong indicators of race-specific fitness
- They show you're performing better than expected based on your recent training progression
- They provide real-world validation of your capabilities
When REN updates your thresholds and predictions based on a PR:
- You set a PR for an effort lasting between 20 minutes and 3 hours
- REN compares this performance to your current predicted capabilities
- If the PR shows significantly more improvement than expected, REN adjusts your Critical Speed threshold and goal prediction accordingly
Example scenario:
- You're training for a half marathon with a predicted time of 1:45:00
- During a training cycle, you run a 10K race and set a PR that's much faster than your previous training suggested
- REN recognizes this as evidence that you've improved more than anticipated and suggests to change your Critical Speed threshold
- Your half marathon prediction adjusts to reflect this new level of fitness
What This Means for Your Training
Stay consistent:
- Your prediction becomes more accurate as REN collects more data about your performance
- Trust the process even if the prediction doesn't change after every workout. Some platforms give the suggestion they can measure progress after every workout. The human body doesn't work like that. We love instant gratification, but we don't live in lalaland.
Performance matters:
- Both structured tests and race efforts help REN understand your true capabilities
- These moments of validation ensure your prediction stays grounded in reality
Focus on execution:
- The prediction is a guide, not a guarantee
- Your job is to follow the training plan and execute when it matters most
The Bottom Line
Your goal predicted race time adapts to your actual performance, not just your training volume or consistency. Performance tests and significant PRs serve as checkpoints that help REN recalibrate its understanding of your fitness. This ensures your prediction remains realistic, achievable, and aligned with your true capabilities.
Remember: Progress isn't always linear, and predictions will adjust both up and down. What matters most is showing up consistently and letting your performances speak for themselves.