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I've seen the phrase used a lot in guides for training but i can't seem to find anywhere a definition of what a "quality" run might be.
if there is such a thing as a "quality" run, that kind of implies that there are non-quality runs, which don't sound like they're much cop to be honest. i thought all my runs were worthy.
i'm pretty new to runnning, having been totally put off at school a long time ago and i'm finding the deluge of differing advice, training plans and philosophies a bit bewildering to be honest.