Tempo Run - Zone Check

Hi,

So I did my tempo run today. Warm up of 1k at 5:38 pace, tempo run of 4k at 5:00 pace and cool down of 1k at 5:45 pace. Most of the run was in zone 5. To be honest I have never cared about zones, I have endurance to run longer but my heart rate stays in zone 5.

Not sure if I need to change anything or it's fine.

For comparison for interval run I run a pace of 4:40-4:50.

Ps: I am unable to add screenshot of Strava/ Garmin here.