It's also why it's a probaly "semantics" to folks but it's why I call it "easy" and not "slow". You can't go push effort when it's "easy", but you can certainly be going harder than easy effort on "slow" runs (a lot of this has to do with total volume on the legs). So sometimes "slow" runs can still be efforts that wouldn't be described as "easy", but you can't really go "easy" and they be harder than they should be.

ETA: It's also interesting that 2 people in 4 posts call it "slow" and not "easy". Ha

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Brooks Doughtie, M.S.
Exercise Physiology
-USAT Level II