Old Guy Running. Strava App Review Part 2: Forcing Strava to work for you. Timing your Intervals.
Strava is not user friendly, but you can "make" it time your 1K or one mile reps with a little guile.
Follow my tips or try pressing the pause button at the end of each rep, and see what Strava records for you. Press the pause again at start of 2nd and future reps too.
David Holt, author of 5K Fitness Run