It might be valid for marathon training - building distance endurance is usually a bit slower than marathon pace, and progressing from over 10 to 20 miles.
I' not sure of it's value in training for an HM
#guesswork
@NotThamesWater started
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It might be valid for marathon training - building distance endurance is usually a bit slower than marathon pace, and progressing from over 10 to 20 miles.
I' not sure of it's value in training for an HM
#guesswork