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How long should an ultrarunner's longest run be in training prior to racing an ultramarathon? Coach Jason Koop explains.
UltraRunning Magazine November 2021 by UltraRunning Magazine - Issuu
A new start after 60: I ran a 100km ultramarathon at 70 – despite my arthritis, Running
Marathon Training: How Long Should Your Longest Long Run Be?
Run as long as you can until you can't': The motivation behind ultrarunning - Medill Reports Chicago
What is an ultramarathon, how far and on what terrain?
Ultramarathon Long Runs: How Long Should Your Longest Long Run Be?
What Recovery From A Multi-Stage Ultramarathon Looks Like
5 Things Aging Runners Need To Do In Your 50s, 60s, and Beyond - CTS, grand masters running age
CTS Exmoor Marathon Review - Alastair's Perspective
When to Start Training For Your First or Next Ultramarathon - CTS Ultrarunning
How Block Training Can Help or Hurt Ultramarathon Training - Jason Koop
Why are ultramarathon runner generally more muscular and marathon runners are not? - Quora
Understanding Long-Run Training For Ultras - Trail Runner Magazine