Should you head out the door for a 30-minute run or a 3-miler?
you’re free to plan your workouts by time or distance, but each has its advantages.
Heres how to decide.

The Case for Miles
Distance measurements are standard for serious runners, though by no means universal.
Here are some of the points in favor of miles.
Mileage per week is a key number when youre reading about what other runners do.

you might also track your consistency and your progress through weekly mileage.
And about that training plan: most likely, it will dictate your runs in terms of miles.
Yes, but theres a difference.
These tend to adapt more slowly than muscle.
Your shoes suffer similar stresses: most manufacturers recommendretiring shoes from running duty after 300-500 miles.
Learning how long a mile feltat a variety of paces from Whee Im flying!
When youre done, youre done.
For runners that hate runningwhich, paradoxically, is most of usthats a wonderful opportunity.
It has a few other advantages too.
If youre a beginner or if youre returning from a break (that sprained ankle?)
Thats why so many beginner programs are written in terms of minutes.
Remember about tracking weekly mileage?
You cant do that if you dont know your total miles for the week.