The findings from a new study about the running cadence

As for the magical 180 steps per minute is a good aspirational goal for many runners. Lots of runners overstride, crashing down on their heels and putting excessive force on their joints. 

Instead of the most widely cited and hotly contested rules of running form: 

All runners, regardless of what speed they’re running at, should take at least 180 steps per minute.

More details:
It’s Time to Rethink the Ideal Running Cadence