It's not something that I think about. I guess it is by changing cadence and/or stride length.
My fastest run this year: 5k @ 4:10min/k for 20:52 - Cadence 177 spm
My longest run this year: 26k @ 5:58min/k for 2:36:00 - Cadence 168 spm
Yesterday's easy run: 6.9k @ 6:07min/k for 42:35 - Cadence 166 spm