Welcome back! The final installment in our running challenge is the long slow distance run. (If you see “LSD” on a fellow runner’s calendar, they are not talking about psychedelic drugs. Probably.)

Lifehacker

7 years ago

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Welcome back! The final installment in our running challenge is the long slow distance run. (If you see “LSD” on a fellow runner’s calendar, they are not talking about psychedelic drugs. Probably.)

vitals.lifehacker.com

How to Add a Long Run to Your Running Routine