Is resting heart rate a good indicator either? Mine is typically 55-58bpm but I do no organized exercise and am sitting for much of the day (I do try to walk quick and run up stairs to make up for it, so while I&#x27;m not &quot;fit&quot;, I don&#x27;t feel <i>unfit</i> per se).<p>I am free from cardiac related symptoms, so does this mean I am &quot;naturally&quot; fit without really trying? (A bit like people who don&#x27;t focus on their diet but are slim.) Or, as I suspect, is resting heart rate not a very useful indicator of fitness at all?