Return to running calculator
How long before you can run 30 minutes straight?
Two questions, and you see your return stage by stage, at the earliest, with what can make it longer. The same calculation as the app, no account, and nothing is sent.
What follows applies once a health professional has cleared you to return.
At the earliest
12 to 18 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
No study measures how long this return really takes: the upper bound adds a cautious margin.
What your program is based on
- The ladder
- The 10 stages of McKay (2020).
- Discomfort
- Stronger discomfort is accepted during the effort, if the tendon is back to its usual level the next day (Silbernagel, 2007).
- To move up
- Two successful sessions per stage.
- The rhythm
- Three days without running between two runs: the tendon recovers. That is what sets the rhythm.
- The upper bound
- No study measures this duration: cautious margin.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- The tendon needs recovery days between two runs: more runs a week change nothing.
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
The studies we use put no figure on a return-to-running duration; the tendon adapts slowly, in months rather than weeks.
At the earliest
20 to 30 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
No study measures how long this return really takes: the upper bound adds a cautious margin.
What your program is based on
- The ladder
- The 10 stages of McKay (2020), flat-ground work, hills later.
- Discomfort
- Moderate discomfort is accepted during, after and the next day (Pringels, 2025).
- To move up
- Two successful sessions, and at least two weeks per stage.
- The rhythm
- The two weeks per stage set the duration, not the number of runs.
- The upper bound
- No study measures this duration: cautious margin.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- Each stage lasts at least two weeks, whatever your rhythm.
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
At the heel insertion, each stage lasts at least two weeks (Pringels, 2025): that sets the duration, not the number of runs.
At the earliest
7 to 10 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
No study measures how long this return really takes: the upper bound adds a cautious margin.
What your program is based on
- The ladder
- The 10 stages of McKay (2020), the trial run on this injury.
- Discomfort
- No discomfort accepted: the trial gives no rule, so the app takes the most cautious one.
- To move up
- Two successful sessions per stage (one in the trial).
- The rhythm
- A day without running between two runs at the start of each stage.
- The upper bound
- The trial does not measure how long a real return takes: cautious margin.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
McKay trial (2020), 24 female runners: the same ladder, one stage per session. A small trial: it does not say how long a real return takes.
At the earliest
7 to 10 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
No study measures how long this return really takes: the upper bound adds a cautious margin.
What your program is based on
- The ladder
- The 10 stages of McKay (2020): no ladder has been tested for this injury.
- Discomfort
- Mild, and not lasting after the session; your first steps in the morning are the guide.
- To move up
- Two successful sessions per stage.
- The rhythm
- A day without running between two runs at the start of each stage.
- The upper bound
- No study measures this duration: cautious margin.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
No study gives a return-to-running duration for this injury. The calculation is the one of the ladder the app uses.
At the earliest
7 to 10 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
No study measures how long this return really takes: the upper bound adds a cautious margin.
What your program is based on
- The ladder
- The 10 run-walk stages of McKay (2020), tested on IT band syndrome: no ladder has been tested for the knee.
- Discomfort
- Mild during the run, back to its usual level the next day (Esculier, 2018).
- To move up
- Two successful sessions per stage.
- The rhythm
- A day without running between two runs at the start of each stage.
- The upper bound
- No study measures this duration: the margin is a cautious choice.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
Esculier trial (2018), 69 runners: discomfort and daily life improve from 4 weeks, and still hold at 20 weeks. No study measures how long it takes to get back to your usual running.
At the earliest
4 to 16 weeks to run 18 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
6 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
In the Moen trial: 102 to 118 days on average (15 to 17 weeks), at three sessions a week.
What your program is based on
- The ladder
- The 6 phases of the Moen trial (2012), run on shin splints.
- Discomfort
- Mild discomfort is accepted during the run, just after and the next day: the trial’s rule.
- To move up
- Two successful sessions per phase.
- The rhythm
- A day without running between two runs at the start of each phase.
- The upper bound
- Set on the trial’s real duration.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
Moen trial (2012), 74 athletes, the same six phases: 102 to 118 days on average to reach 18 minutes continuous, with wide differences; one in five did not finish. The upper bound of the calculation takes it into account.
At the earliest
10 to 15 weeks to run 30 minutes straight, if every session goes well
running walkingnumber: weeks to reach it, at the earliest
10 stages, from run-walk to continuous running. The upper bound adds a margin, because real returns take longer than the minimum.
In the studies: return to sport in 44 days on average for the inner edge of the shin (Hoenig, 2023), a different measure from continuous running.
What your program is based on
- The ladder
- The 10 stages of McKay (2020): the first, 30 seconds of running, follows the principles of George (2024).
- Discomfort
- No discomfort accepted, during, after or the next day.
- To move up
- Three successful sessions per stage: bone adapts slowly.
- The rhythm
- A day without running between two runs at the start of each stage.
- The upper bound
- No study measures this duration: cautious margin. Only the inner edge of the shin and the top of the foot have a program.
The same calculation as your path in the app. Discomfort thresholds stay in the app: applied without the next-day check, they would read like personal advice.
What can make your return longer
- It takes three successful sessions to move up a stage, instead of two, and the slightest discomfort pauses running.
- Discomfort that rises during the session or the next morning keeps you at the same stage, or takes you back one notch.
- A week without running pushes everything back by as much; a longer break restarts a little lower.
- A warning sign (discomfort at night, at rest, swelling) stops the program: see a professional.
What the studies say
George review (2024), 50 studies: first intervals of 30 to 60 seconds, every other day. A high-risk site is for a doctor to manage: Pantari offers no program there.
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A range, never a date: it assumes every session goes well. In the app, it is recalculated after each session, from your discomfort and your real rhythm.