This video speaks for itself, but let’s take note of some points of interest: While the young square dances, notice that they have time to pause sometimes between calls. Did you notice how quickly they move and add in an extra time around for a partner swing while they are moving. Mmmm, energy to burn!
Also note the tempo is suited for the age group depicted. The one couple that danced an average of 5 days a week was actually very normal for that time. (In my young years, I was pretty much every night or day of the week during that time period.)