Tag
stopwatch
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Plank timer: how long to hold a plank, and why 2 min is plenty
How long to hold a plank: 20-30s to start, 60s as a target, 2 minutes is strong. Past that, add difficulty instead of time. Plus plank interval sets.
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Best way to use a stopwatch for running splits and lap times
Using a stopwatch for running is about laps, not the total. How to take splits, what to record, and which numbers actually tell you something.