Do you use a heart rate monitor when you train/casual exercise? Are you striving to maintain your HR in a certain "zone" or are you just "keeping an eye on things"? Do you adjust your work out routine based on your heart rate? I used to use a HR monitor when I was cycling years ago and tried to keep my HR in a certain zone except for cool down periods. Now days, I'm an old fogie and merely want to monitor my general fitness and not exceed a max suggested HR. How about you?