According to the American Heart Association, you can get an accurate blood pressure reading by doing the following: Don't smoke, exercise, drink caffeinated beverages or alcohol within 30 minutes of the reading.
1 In the same television series Joel Nestler played the teenage aged version of Clark Kent.  Superman (1948) and Atom Man vs. Superman (1950) were the first television series made starring the comic book character Superman. Kirk Alyn played the super hero in both these productions.
In the season seven premiere (Closure, 7x01), Jack has been replaced by Special Agent Clark Medina (played by Steven Weber). Jack was offered another job and considered taking it, but turned it down. A few episodes later, Clark gets Jack his job back before leaving for a better job.