Dan Caron, co-founder of RNWY, after a run, reflecting on long-term training and joint health for runners

Why Runners Break Down — and What I Built to Prevent It

Dan Caron running during training, testing joint and tendon support over long-term mileage

Built from miles, not meetings

 

Most runners don’t think about joints or tendons until something starts hurting.


By the time pain shows up, something’s already been under stress for a long time — cartilage wearing down, tendons taking more load than they can recover from, connective tissue lagging behind the miles.


I know because I’ve been there.


Running has a way of exposing the weak points in your body. You can feel great for months, even years, and then suddenly something starts whispering at you. Ignore it long enough, and it starts yelling.


That’s not bad luck. That’s biology.


And it’s the reason Foundation exists.

 


 

 

Running Is Hard on the Parts You Don’t See

 


When people think about fueling for running, they usually think about:

 

  • energy

  • electrolytes

  • muscle recovery

 


All important.


But running doesn’t just stress muscles. It repeatedly loads joints, cartilage, tendons, and ligaments — the connective tissues that don’t get the same blood flow or recovery speed as muscle.


Muscle adapts quickly.

Connective tissue does not.


That mismatch is where most overuse injuries live.

 


 

 

Why “Just Taking Collagen” Wasn’t Enough


For a long time, collagen was lumped into one bucket. Take some powder, hope for the best.


But not all collagen targets the same tissues.


As I dug deeper — and tested things on myself — it became obvious that joints and tendons need different support. Cartilage behaves differently than ligaments. And if you train consistently, those differences matter.


That’s when Foundation started to take shape.


Not as a “joint product.”

Not as an “injury fix.”


But as a way to support the exact tissues running beats up the most — before they break down.

 


 

 

FORTIGEL®: Supporting the Joints That Absorb Every Step

 


Every stride compresses your joints. Over time, cartilage takes a real hit — especially with higher mileage, harder surfaces, or years of training.


FORTIGEL® is a specific collagen peptide shown to support cartilage metabolism. In plain terms, it helps maintain the tissue that cushions your joints and keeps movement feeling smooth.


I didn’t include it because it sounded good on a label.

I included it because running without joint support eventually catches up to you.


Used consistently, FORTIGEL® supports the parts of your joints that don’t get stronger just by running more.

 


 

 

TENDOFORTE®: Keeping Tendons and Ligaments in the Game

 


If joints are about compression, tendons and ligaments are about tension.


Every push-off, every landing, every hill repeats that load thousands of times. Tendons don’t fail overnight — they degrade slowly until one day they don’t tolerate training anymore.


TENDOFORTE® is designed to support tendon and ligament structure — the tissues responsible for transferring force and keeping joints stable.


For runners, this matters more than most people realize.


Strong muscles don’t help much if the connective tissue linking them can’t keep up.

 


 

 

Why Foundation Is a System — Not a Single Ingredient

 


Foundation isn’t built to fix pain.


It’s built to support long-term training.


FORTIGEL® supports cartilage.

TENDOFORTE® supports tendons and ligaments.

Electrolytes support hydration and movement.


Together, they address the reality of running: repetitive stress over time.


This is the stuff that lets you stack weeks.

Stack months.

And keep showing up without constantly resetting due to setbacks.

 


 

 

This Is How I Train Now

 


I don’t train to see how much I can get away with anymore.


I train so I can keep moving — not just this year, but years from now.


Foundation is part of that approach. Not because it’s magic, but because it supports the tissues running asks the most from.

 

If you want to train longer, stay upright, and keep enjoying the process, you have to support the parts of your body that don’t adapt quickly on their own.


That’s what this is for.

— Dan