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Spenser is a former competitor on "American Ninja Warrior," a current CrossFitter, and an aspiring indoor skydiver.
What one writer learned the hard way.
Here are three key lessons on building strength, and mastering endurance.
If you're strong in a wind tunnel, you can be strong on the ground.
It's airborne and adrenaline-charged—and it'll get you ripped.
Zach Bitter is a 100-mile record holder. He eats almost no carbs.
The greatest feats of fitness from this year's event.
We rank the top female contenders participating in this year's event.
Get ready for the CrossFit Games.
Look for these beasts to dominate the leaderboard.