This was the right first run after the PR. The pace stayed genuinely relaxed, heart rate remained well controlled, and the session never tried to become more than recovery.
The best signal is that you were able to keep the effort calm even when the legs felt a little heavy. That kind of restraint matters after a hard race, because it lets the body absorb the breakthrough instead of immediately spending it again.
This run confirms that recovery is moving in the right direction. The next step can be a gentle aerobic long run, but it should stay easy and serve as a bridge toward the marathon block rather than a new test.
Takeaway. Good post race recovery signal. The PR has been absorbed well so far, but the next run should still protect freshness and build easy aerobic volume before the marathon block starts in June.
Next step. Easy aerobic long run. A relaxed long run to rebuild rhythm after race week. Keep it easy, steady, and clearly below workout effort.