30 min or 3 miles wonderful. The gold standard.

Back in day of 100 mile run weeks or later in my history of 50 miles a day of cycling.
30 min or 3 miles was a waste of time.
But now it's the gold standard for those of us who have dog dreams.
Thank you slowtwitch (Dan)
From Truckee California

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http://www.truckeecyclocross.com
California