When people hear that I train for endurance races without a thyroid, they often assume the hardest part must be the workouts.
The miles.
The early mornings.
The long runs.
But the truth is, endurance sports have actually been one of the greatest teachers in my life after losing my thyroid.
When my thyroid was removed in 2005, I had to learn how my body worked all over again.
Energy felt different.
Recovery felt different.
Even fueling felt different.
And like many people navigating life without a thyroid, there were moments where I wondered what my limits would look like moving forward.
But endurance sports have a way of teaching you something powerful.
They teach patience.
No one runs a marathon by sprinting the entire way. Progress happens one mile at a time, one training day at a time.
Living without a thyroid is very similar.
Some days your energy feels strong.
Other days your body asks you to slow down.
And the key isn’t fighting those signals — it’s learning from them.
Over time I also learned that my body responds differently to things many people don’t even think about.
Heat and cold can affect me much more than they used to. Extreme temperatures can take a real toll on my energy levels and how my body feels during workouts.
I also had to learn how to recognize things like heart palpitations and understand when my body was telling me something needed attention.
Another important lesson was learning how medication works.
When you live without a thyroid, you rely on medications like T3 and T4 to replace the hormones your body would normally produce. But those medications don’t adjust overnight. If your doctor changes your dosage, it can take three or more weeks for the body to fully respond.
That takes patience.
You can’t expect immediate changes. Your body needs time to find its balance again.
Weight was another lesson that took time to understand.
There were moments when I felt like I was doing everything right — eating well, training hard, staying active — and yet my body weight didn’t always respond the way I expected.
Living without a thyroid sometimes means accepting that your body may hold weight differently or respond differently than someone else’s.
That doesn’t mean you stop moving.
It means you learn to work with your body rather than against it.
Endurance training also teaches resilience.
Not every run feels good.
Not every training week goes perfectly.
But when you keep showing up, your body adapts.
Over the years, endurance sports have shown me something I wish more people understood after thyroid surgery or diagnosis:
Your body is still capable of incredible things.
You may have to listen more closely.
You may have to adjust your approach.
But strength, endurance, and progress are still possible.
Every run reminds me of that.
Every class I teach reminds me of that.
And every step forward — no matter how small — reminds me that progress is always possible.
"Because a small step still takes you forward."
— Danniela
IronSunshine ☀️
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