I've just started using the Apple Watch Ultra and its Workout app to record my runs, and I'm getting very mixed results with intervals. The other day, I did a simple fartlek run—1:05 on, 1 off, 12 reps—and everything imported just fine. Today I did a 10-minute warmup, a 6-mile steady state, and a mile cooldown—all built as a single Custom Workout, and the middle section came in as literally 100 segments, some of them as short as 15 seconds.
I don't know if this is an Apple problem or a Strava problem, but it's a pretty weird one! Any insight here?





