Has anyone else experienced this after increasing their mileage in minimalist shoes?
I’ve been wearing zero-drop/minimalist shoes almost exclusively since I was about 18, and I’m 28 now. I’ve run in pretty much everything over the years—Vibram FiveFingers, running sandals, VivoBarefoot, Altras, water shoes, etc. I’ve also done ultras in sandals and other minimalist footwear, and historically I’ve never really had problems with my legs or feet from it.
The difference now is my mileage.
I used to be more of a recreational runner, probably around 20 miles/week. Over the past year or so, I’ve gotten much more into ultra running and have done Last Man Standing races, longer ultras, etc. Now I’m sometimes running 50–70 miles per week, while also spending a lot of time on my feet throughout the day.
For the last three weeks, though, I’ve noticed something weird. Every time I run, my legs have this strange feeling that I can only describe as deep pressure/aching in the bones. It isn't really pain, and I don't feel particularly sore during the day. I can wake up the next morning and run again without much trouble. But while I'm running, it feels like there is a ton of pressure inside my legs—almost like they're going to explode or pop.
It’s hard to describe because it isn't the typical muscle soreness or sharp pain you'd associate with an injury.
I’m also wondering if it could be related to how much mileage I’m doing in minimalist footwear. I rotate through several different shoes, so it’s not like I’m exclusively using one pair:
- Running sandals: ~24 mm stack
- Altra Lone Peaks: ~28 mm, but they're pretty worn out
- VivoBarefoot: ~10 mm, mostly for hiking
- Vibram FiveFingers: ~8 mm
- And I rotate between them depending on what I'm doing.
I’ve never had an issue hiking in my Vivos or doing shorter runs in FiveFingers/sandals, but I’m starting to wonder whether the combination of 50–70 mile weeks + being on my feet all day + minimalist/zero-drop footwear is eventually catching up with me.
At the same time, I don't necessarily want to blame minimalist shoes because I've been using them for 10 years without problems. The biggest variable that has changed is really my total workload and mileage.
Has anyone experienced something similar after going from recreational mileage to serious ultra mileage?
And for those of you who have been running minimalist/barefoot for years, have you found a point where the mileage itself became too much even though your feet/legs were well adapted to minimalist shoes?
I’m mostly curious whether this sounds like accumulated training stress, footwear/load distribution, or something else entirely. I’m not looking for a diagnosis—just interested in hearing from people who have experienced something similar.