Tools2 mentions

Stopwatch

Used to run a 30-second attention test to assess whether you can maintain attention without getting lost in thought.

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“In fact, there is a one-mile walk test you can do. In this case, you have to have some sort of either a stopwatch or ideally a heart rate monitor.”

Andrew Huberman · Essentials: How to Assess & Improve All Aspects of Your Fitness | Dr. Andy Galpin · Sep 17, 2026 · 24:30 · YouTube ↗

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