I just tried this dumbbell workout with 5 million views — here’s what happened

As a runner, I am guilty of neglecting my arms when it comes to training. I spend time working on leg and core strength in the gym, but I often avoid lifting the best adjustable dumbbells over my head for shoulder presses.

That said, a strong upper body is important for runners, whether they’re running a 5K or a marathon, as it allows them to run more efficiently. So I set out to find a dumbbell arm workout to try on my lunch break.

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