Such heart rate at rest indicates cardiac efficiency of an individual, and ranges between 60 to 100 bpm (beats per minute) for adults. However, values closer to the lower limit of this range qualify as a good resting heart rate. In fact, well trained athletes show a resting heart rate between 40 to 60 bpm.
Rule 1. With a computer, use only one space following periods, commas, semicolons, colons, exclamation points, question marks, and quotation marks. The space needed after these punctuation marks is proportioned automatically.
Other than that, do it the way you want.  Hope this helps     According to the 6th Edition of the Publication Manual of the APA, space twice after punctuation marks at the end of a sentence. Section 4.01 - last sentence.