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.
I only use one space after colon and semi-colon. They are intermediate place punctuation, unlike full stop, exclamation and query which are terminators. One space either side of a dash - but none when the - is a hyphen. When I was working on Apple Macs, I used a long dash for dash and a short dash for hyphen.