The trans-daily principle of resting, which is the whole key to weightlifting---separating workouts by at least a day to allow for repair and extra growth of muscle cells---may have an analog in the concept of the 7th in the Bible.
Sevenness of the Hebrew Shabbat is obscured by the English word Sabbath and the fact that we use it only in the context of days of the week. But it could work for every seventh week, month, year, and in the case of the Jews in the Bible, they took a 7-year vacation every seventh set of seven years, and that seven years was I think called the Jubilee.
