This measure won't take 5 seconds of your life. For only 2 seconds, you can find out if your heart (and even arteries) is healthy.
Try sitting down and legs stretched in front of you. Now, do this - touch your toes. Did you manage to reach your toes?
Well, you're lucky if you did because that means your vessels are still limber and elastic because if they are, it is better to maintain blood pressure at normal. However, if you can't even go past your legs then it's high time to hit the running tracks, exercise and proper and balanced nutrition eating habits.