How often should I run, and for how long, exactly? And of course, what the heck is a Gu? As I settled into a pace, I had another question in the back of my mind: how long does it take to get faster?
If you prefer more structure, try a ladder fartlek: Run fast for one minute, recover with a jog, then repeat, running for two ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback