“How do I get back into running” gets answered the same generic way everywhere: cut your mileage in half, build back slowly, listen to your body. That advice isn’t wrong, but it’s also not specific enough to be useful, because a two-week break for a busy work stretch and a ten-week break recovering from a stress fracture aren’t the same problem – and treating them the same is exactly how a comeback turns into a second injury.
The actual return-to-running timeline depends on two things: why you stopped, and how long you were out. Here’s how I work through it with a runner in front of me.
The two questions that decide it
1. Why did you stop? A break for life reasons – work, travel, a busy patch, general burnout – with no underlying injury or illness is the lowest-risk return. Your cardiovascular fitness has detrained somewhat, but your tissue is otherwise intact. A break because of an injury or illness is a different situation entirely: the tissue itself may not be back to full capacity even once symptoms are gone, and returning at pre-break volume risks reinjuring exactly what forced the break in the first place.
2. How long were you out? Detraining isn’t linear – aerobic fitness starts declining within about two weeks of no training, but the rate accelerates the longer the break continues. A two-week gap and a ten-week gap require meaningfully different rebuild timelines, not just a scaled version of the same plan.
The decision tree
Short break (under 3 weeks), no injury or illness – You’ve lost very little. Resume at roughly 80% of your pre-break volume in week one, back to full volume by week two. No need for an extended rebuild.
Moderate break (3–8 weeks), no injury or illness – Real detraining has occurred, particularly in aerobic capacity. Start at 40-50% of pre-break volume, and plan a genuine 3–4 week build back rather than jumping straight to where you left off. Intensity work (anything above threshold effort) should wait until at least week two of the rebuild.
Any break due to injury, regardless of length – This is not primarily a volume question – it’s a tissue-readiness question. Even once pain is gone, the injured tissue is very likely still below the capacity it had before the injury. Returning at any meaningful volume before addressing the movement pattern that caused the injury in the first place is the single most common reason I see runners reinjure on the comeback, sometimes within the first two weeks back.
Long break (8+ weeks), no injury – Treat this closer to building a new aerobic base than resuming an existing one. Start at 30–40% of previous volume, expect a 6–8 week rebuild, and be honest that your previous fitness level isn’t coming back in two weeks just because you remember what that volume used to feel like.
A case from clinic
A runner came to me six weeks after a diagnosed stress reaction in the tibia, cleared to return by imaging, no pain at rest or on daily activity. His plan, worked out on his own, was to resume at roughly 70% of his pre-injury weekly volume in week one – reasonable-sounding, and exactly the kind of plan generic “ease back in” advice would support.
The problem: imaging clearance tells you the bone has healed. It doesn’t tell you whether the movement pattern that caused the stress reaction in the first place has been addressed. On screening, the same ankle dorsiflexion restriction that’s a common driver of tibial stress injuries was still clearly present – nothing about six weeks of rest had changed it, because rest doesn’t fix a restriction, it just removes the loading that was exposing it.
We held his return volume to roughly 30% of pre-injury levels for the first two weeks, added targeted ankle and calf loading immediately, and only began increasing running volume once the screen showed real improvement – around week four of his return. Slower than he wanted. But by week eight he was back at full volume with no recurrence, versus a real risk of re-injuring the same site within weeks had he followed his original plan.
What to actually check before you restart
If your break was injury-related, the question that matters isn’t “does it still hurt” – it’s whether the underlying restriction that caused it has actually resolved. (A free interactive self-screen — the same checks I run with returning runners — is coming soon. In the meantime, email and I can recommend what to check.)
The bottom line
“How do I get back into running” doesn’t have one answer, because the honest response depends entirely on why you stopped and for how long – a life-circumstances break and an injury break need genuinely different rebuild plans, even if the time away looks identical on a calendar. Getting that distinction right is usually the difference between a comeback that sticks and one that ends in the same injury within a month.
