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 · 1:42:54 off fitnessA goal1:36B goal1:39Current PB1:44:30
Based on your 10K PB (0:43) · goal pace 0:05/km
- 1 mile could be faster · 6:11 off fitnessA goal0:06B goal0:06Current PB6:17
Based on your 10K PB (0:43) · goal pace 0:04/km
- 1/2 Mile could be faster · 2:58 off fitnessA goal0:03B goal0:03Current PB3:01
Based on your 10K PB (0:43) · goal pace 0:04/km
- 5K could be faster · 20:34 off fitnessA goal0:21B goal0:22Current PB20:55
Based on your 10K PB (0:43) · goal pace 0:04/km
- Marathon — no PB yetAim for 3:20
Equivalent to your 10K PB of 0:43 · 0:05/km
All equivalent times
- 1 mileequiv. 0:06(PB 6:17 · room to improve)from 10K
- 5Kequiv. 0:21(PB 20:55 · room to improve)from 10K
- 10Kequiv. 43:34(PB 0:43 · stronger than curve)from 1 mile
- Half marathonequiv. 1:36(PB 1:44:30 · room to improve)from 10K
- Marathonequiv. 3:20(no PB yet)from 10K
- 1/2 Mileequiv. 0:03(PB 3:01 · room to improve)from 10K
Current PB · 1/2 Mile
3:01
3:46/km · Wed, Jul 29, 2026 · first attempt
Stretch goal from your other PBs
0:03
B goal 0:03Your 10K PB (0:43) projects 0:03 here (0:04/km). Current PB is 2:58 slower than that fitness.
Timeline
Newest first. Green means faster than your previous attempt.
- 3:01Wed, Jul 29, 2026 · 3:46/kmPBFirst