Final answer:
The statement is false; when building cadences in the context of charting activities and calorie usage, weekdays and weekends are not counted equally. The purpose is to differentiate and compare activities and calories burned on a typical weekday versus a weekend day.
Step-by-step explanation:
The statement that when building cadences, the day number assigned to each step will count weekdays and weekends is False. The context of the question involves charting activities and calories used over two 24-hour periods, where one is a weekday and the other is a weekend day. This implies that the differentiation between weekdays and weekends is important and they are not counted equally in this procedure.
Furthermore, the mention of a calendar round system used by the Aztecs reflects an historical approach to tracking time and days but doesn't directly correlate to the modern practice of building exercise cadences, which is what the question seems to be addressing. The calendar round with its interlocking cycles and ceremonial aspects does not influence how modern-day cadences are built.
The reference to Astronomy and the Days of the Week shows that while our current seven-day week may have celestial origins, this information does not impact how days are counted in an exercise cadence, where the focus is on personal activities and calorie count over specific days of the week.