Return to run
Come back from injury without re-injuring
Most re-injuries happen in the first 6 weeks back. The single biggest cause is ramping volume too fast — ignoring the ACWR safe zone of 0.8–1.3. Pick your injury for an evidence-based return plan, or use the calculator below for a generic safe ramp.
Stress fracture
Bone needs to remodel. Walking → walk-run → easy run progression with pain-free criteria at each stage. The most unforgiving running injury for athletes who rush.
Runner's knee (patellofemoral pain)
Most common running injury. Usually no full layoff needed — load reduction plus quad and glute medius strength. Return-to-run criteria: pain-free walking + squat.
Plantar fasciitis
Foot heel pain, worst in the morning. Eccentric calf raises, plantar fascia stretching, supportive shoes. Most don't need full layoff — pain-monitored running can continue.
IT band syndrome
Sharp pain on the outside of the knee, worst on downhills. Stop running until pain-free, then return. Glute medius strength is the long-term fix.
ACWR safe-return calculator
If you don't know your injury or you're returning from a non-specific layoff (illness, travel, life), this is the generic safe ramp. It respects the ACWR ≤ 1.3 ceiling and ramps 10% per week.
Return-to-run after time off is the most common moment athletes get re-injured. The ACWR (Acute:Chronic Workload Ratio) framework keeps the weekly load below the injury-risk threshold of 1.3. Enter your data — we'll generate a conservative 8-week ramp.
What you were running per week before you stopped.
Including the week you stopped. 0 if you ran this week.
Your 8-week return ramp
Run at easy pace only. Every run starts and ends with 5 minutes walking. If pain rises during or after a run, repeat the previous week — do not advance.
| Week | Total km | Per run | Notes |
|---|---|---|---|
| 1 | 8 km | 2 km/run | Walk-run intervals; very conservative. |
| 2 | 9 km | 2 km/run | Walk-run intervals; very conservative. |
| 3 | 10 km | 2 km/run | Continuous easy running. |
| 4 | 11 km | 3 km/run | Continuous easy running. |
| 5 | 12 km | 3 km/run | Approaching pre-injury load. |
| 6 | 13 km | 3 km/run | Approaching pre-injury load. |
| 7 | 14 km | 4 km/run | Approaching pre-injury load. |
| 8 | 16 km | 4 km/run | Approaching pre-injury load. |
This plan respects the ACWR ≤ 1.3 ceiling. If you ramp faster than this, injury-recurrence risk doubles in the published literature.
Related tools and reading
Want your return ramp adjusted to your real data?
SportPlan reads your HRV and prior load history — and adjusts the ramp when you're not recovering as expected. See your first week before you pay. €9.99/month, cancel anytime.
Educational content based on peer-reviewed sports-medicine literature. Not a substitute for in-person evaluation by a sports physician or physiotherapist. If pain persists, worsens, or shows red flags, seek professional care.
Methodology designed by Ramon Curto, MSc Exercise Physiology
Ramon Curto designed SportPlan's endurance-training methodology from exercise-physiology principles. SportPlan applies it autonomously to the information you enter and the data you choose to connect; it is not ongoing one-to-one coaching or medical care.
Last revised July 2026
- MSc Exercise Physiology
- Endurance-training methodology
- Connected training-data analysis
- Block periodization · Polarized training