I don't think this is possible but I'm throwing it out there to see if anyone has encountered this and devised a work-around maybe...?
I use the Run/Walk Alert feature on my 645M and it works beautifully for long and easy runs. But I also set up custom workouts in Connect and upload them to my watch for speed and tempo workouts. Those workouts always have Warm Up and Cool Down segments and during those segments I like to use run/walk intervals to keep my heart rate in check. But when a workout is running on the watch, the automatic run/walk alerts don't happen so I end up having to count footsteps in my head to keep track of my run/walk timing during those segments which gets tedious!
Sooo....is there an easy way to build run/walk alerts into the Warm Up and Cool Down segments of a workout?