If you’ve ever done CrossFit, you know Double Unders, those jump-rope reps where the rope passes under your feet twice per jump, can be maddening. Some people seem to pick them up immediately, while others can spend years trying to get just one.
I was reminded of this recently while coaching Friday afternoon classes at CrossFit Reform. The workout included a certain Double Under test. It’s a great challenge for those already proficient, and a perfect opportunity for others to practice and improve.
Why Double Unders Are So Frustrating
Double Unders aren’t just a physical movement, they’re a skill. I still remember 16 years ago, doing a workout in a friend’s driveway when he got so frustrated trying to learn Double Unders that he threw his rope into a tree (which might be why I decided not to install any trees in our gym 😂).
So, what makes them so difficult for some and easier for others?
It comes down to understanding the difference between training and practice.
Training vs. Practice: The Key Difference
Training is activity that improves performance through measurable physical changes — things like endurance, strength, stamina, and flexibility.
Practice, on the other hand, improves performance through changes in your nervous system — coordination, agility, balance, and accuracy.
To get stronger, you train your muscles over time.
To get more coordinated, you need consistent practice, not necessarily more strength.
Double Unders fall squarely into the practice category. The skill depends on timing, rhythm, and coordination which help sync your jump with the rope’s speed. No amount of calf raises or strength work will substitute for that. It’s all about reps, feedback, and focus.
Breakthroughs Come Through Practice
During Friday’s class, I saw multiple members have big breakthroughs:
- Some finally found their jumping rhythm
- Others slowed their rope speed just enough to find control
- One member hit five consecutive Double Unders for the first time
- Another even got their first ever backward Double Under (which I’ve still never managed myself!)
All of these wins came from the same thing: focused practice. They didn’t happen because someone suddenly got stronger, they happened because people kept trying, failing, adjusting, and trying again.
The “Click” Moment
The cool part about Double Unders (and many other skills) is that they can suddenly click. One day it’s chaos, the next, your timing just works. Compare that to something like a 500-pound deadlift, which takes months or years of consistent training to build.
So if you’re struggling with a skill, whether it’s Double Unders, handstands, or kipping pull-ups, remember:
👉 It’s not about training harder. It’s about practicing smarter.
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