Running PBs
Log finish times for each distance. When you have PBs at more than one distance, FitLog projects equivalent times and stretch goals from your strongest efforts.
What your PBs imply
Using Riegel’s formula from your fastest efforts across distances. If one PB is much stronger than another, you’ll see a stretch goal here.
- Half marathon could be faster · 8:17 off fitnessA goal1:36:13B goal1:39:06Current PB1:44:30
Based on your 5K PB (20:55) · goal pace 4:34/km
- 10K could be faster · 2:58 off fitnessA goal43:37B goal44:56Current PB46:35
Based on your 5K PB (20:55) · goal pace 4:22/km
- Marathon — no PB yetAim for 3:20:37
Equivalent to your 5K PB of 20:55 · 4:45/km
All equivalent times
- 1 mileequiv. 6:17(PB 6:21 · on pace)from 5K
- 5Kequiv. 21:07(PB 20:55 · on pace)from 1 mile
- 10Kequiv. 43:37(PB 46:35 · room to improve)from 5K
- Half marathonequiv. 1:36:13(PB 1:44:30 · room to improve)from 5K
- Marathonequiv. 3:20:37(no PB yet)from 5K
Current PB · Half marathon
1:44:30
4:57/km · Sun, Sep 7, 2025 · 2 attempts
Stretch goal from your other PBs
1:36:13
B goal 1:39:06Your 5K PB (20:55) projects 1:36:13 here (4:34/km). Current PB is 8:17 slower than that fitness.
Timeline
Newest first. Green means faster than your previous attempt.
- 1:44:30Sun, Sep 7, 2025 · 4:57/km
Kenilworth Half
PB−9:22 vs last - 1:53:52Sun, May 25, 2025 · 5:24/km
Edinburgh Half
+9:22 vs PBFirst