Susan I am wondering if you did a test to get your maximum heart rate? I figured mine on the bike is 205 (that is when I see stars), but I haven't run hard enough to get there yet (I don't want to puke in the gym haha). I'm just using 200 as my max until I get the gumption to do a running HR test. Crazy thing is at my age- 46 "they" say it should be 174. Sheesh I can have a conversation at that level.