Just try running slow. What's the worst thing that can happen?
Threshold and Zones 'How-To' Guide: drwilloconnor.com/training-zones-how-to?video=4YaD…
Use My Training Plan drwilloconnor.com/modular-training-plan
Work with me drwilloconnor.com/sp/90-day-system
• Strava: www.strava.com/athletes/21255251
#marathon #running #runner
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