Over the years, as interest in Couch to 5K grew, parts of the plan took on almost mythic qualities. For instance, in week 5 comes a moment that has spawned its own acronym: W5D3 (for week 5, day 3). This day requires the new joggers to step up their efforts considerably. While the previous workout featured two 8-minute runs, separated by a walk, W5D3 requires a continuous 20-minute jog, by far the longest stretch the participants have run to that point. It is feared and loathed by new joggers. In a blog post called “The Dreaded W5D3,” one jogger wrote, “I can think of at least 10 times where
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