What’s Harder: Running a Marathon or DJing 5 Hours? John Summit Shared Smartwatch Data to Find Out.
- Posted on May 12, 2026
- By Men s Health
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- 1 min read
What’s Harder: Running a Marathon or DJing 5 Hours? John Summit Shared Smartwatch Data to Find Out.
The DJ pushes his body to perform at high-energy shows—while taking on races, too.
