I went through this exact same thing 2 years ago! I even posted on here about it. I was obsessed with my heart rate because of the FitBit. I had to stop wearing it. I finally realized that my resting heart rate is in the 50s because I exercise every day. I run about 3 miles a day.I love wearing it now and in fact I like seeing my resting heart rate go even lower. It means your in good cardio shape. My wife's resting heart rate is in the low 50s!