Estimated Best Efforts calculate your fastest times for benchmark distances such as 1 mile, 5km, 10km, and half marathon and will be displayed on your profile page. A Best Effort for a given distance can be calculated at any point in your activity and is not related to your splits. Best Efforts use elapsed time, not moving time, similar to a race where the timer would keep running even if you stop. Estimated Best Efforts are subject to normal discrepancies in GPS accuracy.
Strava requires good quality GPS data to calculate an estimated Best Effort
If there are missing points, errant points or other false accelerations then that part of the activity will not be eligible for a Best Effort. You can create an All-Time PR to get credit for your effort.
Viewing Best Efforts
You can review your best efforts for 1k, 1 mile, 5k, 10k, half marathon and marathon distances on your profile page on the Strava website. When viewing another athlete's profile you will see your best efforts compared to theirs (highlighted below.)
Best Efforts for all benchmark distances be found on the activity page on which you achieved them. There's no way to view all historical Best Efforts in one place.
How can I remove a Best Effort?
If your Best Efforts fail to calculate accurately due to GPS recording issues, you may end up with times that falsely represent your effort. Proceed with submitting a support ticket to have all Best Efforts removed from the activity. Alternatively, you can enter your times manually as an All-Time PR on your profile.
Why are my Best Efforts missing from my activity page?
We will not generate PR achievements on the activity page if it's your first attempt at something. In other words, if this is the first time you have run that best effort distance, you will not see a PR, because you did not approve on a previous time. However, we would still compile that effort on your profile page.
It's also possible you came up just short of the Best Effort distance. Estimate Best Efforts can be finicky - especially when they barely cover the milestone distance. We suggest running through the milestone you are hoping to achieve.
Why are my Best Efforts missing from my profile?
Select the Refresh Stats button underneath your All-Time totals (highlighted below.) If that doesn't help, proceed with submitting a support ticket and we will refresh your Best Efforts for you.