I like to wear a heart rate monitor while spinning or jogging so I have confirmation for how things are going and can adjust my workout. Some might call this OCD; I prefer to think of it as positive motivation. Wearing a heart rate monitor helps me figure out if I’m working too hard (almost never the problem) or if I can safely push a little more to get a great workout in as short a time as possible.
Plus it helps keep my mind off the actual exercise.
The trouble is, I have never been able to figure out what my actual target should be.