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Running Progression Calculator Running Pace Calculator Race Time Predictor Race Strategy Calculator Race Pace Calculator Heart Rate Zone Calculator Training Pace Calculator Running Calorie Calculator Strength Training Plan GeneratorSee how hard you train, track changes in performance and find paces for your next runs. Use your running history to plan ahead or review training with your coach.
Free during early access · No credit card
Garmin file imports, plus experimental support for Amazfit, COROS, Suunto, Polar and Apple Watch.
Follow your heart rate across comparable steady runs.
Weekly median heart rate · bpm
In this sample, later runs show a lower median heart rate in the same pace band.
Illustrative runs, calculated with Runima’s performance model. Not a customer result.
Your smartwatch collects thousands of data points. Turning them into training decisions is the hard part.
Pace, heart rate, lap times — plenty of detail about each run. But how does it fit into your training block, and what has actually changed?
Comparing training blocks by hand takes time. Runima puts distributions, confidence intervals and effect sizes beside your trends, so you can judge the difference.
The same weekly distance can be spread across very different runs. Check upcoming sessions against your recent history, then decide what fits with your coach.
See your runs in a calendar, track training load and compare periods of training. Use kilometres or miles across charts, race splits and calculators.
Weekly distance is only part of the picture. Track recent and longer-term training load, compare easy and hard effort, and check planned run distances against your recent history.
Compare your best efforts across distances and your heart rate at similar paces. Review training periods side by side to see how your results and long runs change.
Import supported health reports to follow sleep, resting heart rate and heart-rate variability (HRV). HRV measures changes in the time between heartbeats. Run files alone do not include your daily recovery history.
Use a recent race result to find workout paces. Compare heart-rate zones, plan race pacing or explore weekly distance changes. The calculators are free, work in kilometres or miles, and need no account.
Start from your recent training or a weekly template. Review workout paces and training load forecasts. Optional distance limits adjust generated runs; workouts entered by a coach get warnings, not automatic changes. Skipped weeks and injury adjustments move the remaining plan.
Read plain-language summaries of your charts. Optional AI explanations can help you review patterns, but can be wrong. Check them against your recorded data and the calculation limits.
Upload run files from supported watch apps. FIT and TCX can add pace, heart rate and laps; supported CSV files contain summaries. Matching runs merge, so repeating an import can add detail without creating duplicates.
Import your runs, set your heart-rate profile and start exploring. More history gives your load trends a stronger baseline.
Export your runs as FIT, TCX or a supported activity CSV. Compatibility and available analysis depend on the export. Sleep, recovery and VO₂max use separate supported CSV formats.
Drag and drop your files with no manual mapping. Matching FIT, TCX and CSV runs merge, with FIT data preferred. Non-running activities are skipped.
Explore your running calendar, load, best efforts and training paces. Choose km or miles, compare training periods and share a read-only view with your coach. Analysis depends on the data you import.
Read load trends alongside session distances and recovery. These example ranges are coaching context, not validated safety thresholds — and ACWR alone does not prescribe a cutback.
42-day weighted average of training stress. A model of accumulated load, not a fitness test.
7-day weighted average of training stress. Recent load, used to model fatigue.
Modelled fitness minus fatigue. Form context to read alongside recovery and how you feel.
Recent load compared with your four-week average. Descriptive context, not injury risk.
See the sources behind the calculations, the data behind your estimates, and where planning assumptions begin.
Running load feeds a model of fitness, fatigue and form. Each activity shows whether its running load came from the pace stream, average pace or heart rate.
Impulse–response model · Banister et al., 1975Recent stress compared with your four-week average. It describes load, not injury risk, and does not trigger cutbacks on its own. Session-distance observations and coaching assumptions stay separate.
Acute:chronic workload ratio · Gabbett, 2016Daniels-based estimates anchor race equivalents and training paces. With suitable recent efforts, compare other models and inspect their sources, dates and limits. Estimates are not guaranteed results.
Oxygen Power · Daniels & Gilbert, 1979Import your runs, understand your load and compare your progress. Plan the next block and share your training with your coach. It's free while we're in early access — and your feedback shapes what we build next.
Free during early access · No credit card
All current analytics and planning features are free during early access. No premium tier, no credit card required.
Request features, report issues, suggest improvements. Early users talk to the people writing the code.
Share load, intensity, training paces, heart-rate zones and recent runs through a read-only link. No coach account needed; rotate or revoke the link anytime.