My Honest Experience YES, YOU CAN!
One of the most common questions I get when people hear my story is simple:
“Is it even possible to train for endurance races without a thyroid?”
The short answer is yes.
But the longer answer is that it takes patience, awareness, and a willingness to learn how your body works differently.
My thyroid was removed in 2005. At the time, I had no idea how much that small gland actually affects the body — metabolism, energy levels, temperature regulation, recovery, and even mental focus.
When the thyroid is removed, your body no longer produces those hormones naturally. Instead, you rely on medication like T3 and T4 to replace them.
For someone who loves endurance sports, that creates a unique challenge.
Because endurance training already pushes the body’s energy systems to their limits.
Add thyroid hormone replacement into the mix, and suddenly things like fueling, recovery, and timing become even more important.
Over the years, I’ve learned a few things that have helped me continue training and racing.
First — energy management matters more than ever.
There are days when energy feels completely normal, and other days when fatigue hits hard. Learning when to push and when to back off has been one of the most important lessons.
Second — fueling is critical.
Many endurance athletes rely on carbohydrates during long workouts, but I’ve noticed that my body responds very differently depending on what I eat and when I eat it. Sometimes simple carbohydrates before or during longer sessions actually help sustain my energy better than heavier meals.
Third — consistency matters more than perfection.
Training with a thyroid condition means some days will feel amazing and others will feel frustrating. What matters most is continuing to show up and building fitness over time.
Since losing my thyroid, I’ve been able to complete marathons, Ironman races, and other endurance challenges. Each race has taught me something new about how my body adapts and how powerful persistence can be.
If you’re someone living without a thyroid and wondering whether endurance sports are still possible for you, I want you to know something:
Your body is still capable of incredible things.
It may take more awareness, more patience, and more learning along the way.
But progress is still possible.
And sometimes the most powerful thing you can do is simply take the next step in front of you.
"Small steps always takes you forward."
— Danniela
#nothyroidathlete
