Yeah ~1k intervals are probably the next step. You can start working them in gradually with just a single interval at somewhat greater than your easy pace then start increasing the number and intensity as feels good and you spot milestones that feel personally meaningful in the distance.
Yeah ~1k intervals are probably the next step. You can start working them in gradually with just a single interval at somewhat greater than your easy pace then start increasing the number and intensity as feels good and you spot milestones that feel personally meaningful in the distance.