Today on the Doc On The Run podcast, we’re talking about whether you can run a 100 mile race in two months with a calcaneal stress fracture.
👉 Need a complete plan to heal your stress fracture and keep your fitness?
Click here for the full stress fracture guide for runners
If you’re a runner and you get diagnosed with a calcaneal stress fracture right before a big race, the first question is always the same:
Can I still run?
In this episode, I let you listen in on a real strategy call with an ultrarunner trying to decide whether he can still complete a 100-mile race in just over two months.
This is not a theoretical discussion. This is a real decision, with real risk, and real consequences.
The calcaneus, or heel bone, takes a tremendous amount of force with every step.
If you overload it too much, a stress reaction can progress to a full fracture.
And if you ignore it and keep running, you could turn a manageable injury into a catastrophic one.
One of the biggest dangers with stress fractures is not the pain—it’s the risk of a complete break.
If the bone fails under load, you could wind up with surgery, hardware, and long-term pain that never fully goes away.
That’s the line you cannot cross.
There are three key signs you must track with a stress fracture:
If any of these get worse, you are going in the wrong direction.
If they stay the same or improve while maintaining activity, you may still be on track.
The goal is not to stop all activity.
The goal is to find the exact line between:
Somewhere in between is the workload that allows healing while preserving fitness.
You have to double down on everything that maintains fitness without loading the injured bone:
You can maintain far more fitness than you think if you do this correctly.
The highest risk period is not now—it’s about 4 weeks before your race.
This is when runners panic and try to “make up” missed workouts.
That’s when injuries often get worse.
The goal is always the same:
Heal as fast as possible while maintaining as much fitness as possible.
If you do that, you give yourself the best chance of making it to the starting line—and finishing.
If you want help figuring out how severe your stress fracture is right now, get the Stress Fracture or Injury Self-Assessment Worksheet.
It will help you:
You can get it free at StressFractureSecrets.com.
If you have a calcaneal stress fracture and you’re trying to decide whether you can still run your race, this episode will help you understand the risks, the strategy, and how to make the smartest possible decision.
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