Run a Marathon in Space? Suni Williams did it!

Imagine running a marathon… in space. That’s exactly what astronaut Suni Williams did aboard the International Space Station in 2007. While thousands ran the Boston Marathon on Earth, she celebrated from orbit by running the same 26.2 miles tethered to a treadmill in microgravity. Using a special harness and bungee cords to stay grounded, Suni completed the space marathon in 4 hours and 24 minutes. This isn’t just an amazing human feat — it’s also a reminder of how astronauts stay fit in space to fight muscle and bone loss caused by microgravity. Most astronauts use treadmills for routine workouts, but running a full marathon? That’s next-level dedication. Watch to learn how this Massachusetts native and NASA trailblazer made history — and inspired countless runners and space fans back on Earth.