[cameldrv]

That was a long time ago and it was a Polar watch with a chest strap. These days I use a Garmin watch, but you could just as well use a Fitbit or an Apple Watch or a heart rate strap and your regular phone. Honestly I don't even look at my watch during a run very much anymore, because I know what various heart rates feel like. The biggest thing for me was to realize that I was just trying to go too fast, and the HRM helped me with that.