Most of us are aware that our bodies operate on a daily rhythm. But did you know we also have seven-day body rhythms?
Scientific evidence now points to the fact that life on earth has an unexplainable “built-in” clock that operates on a seven-day cycle known as the circaseptan rhythm. It’s during this circaseptan rhythm cycle when several biological processes seem to rise and fall in seven-day cycles.
According to Vibrant Life, the biological processes include: “heartbeat, blood pressure, body temperature, hormone levels, acid content in blood, red blood cell count, oral temperature, female breast temperature, urine chemistry and volume, the ratio between two important neurotransmitters: norepinephrine and epinephrine, and the flow of several body chemicals such as the stress-coping hormone cortisol. Even the common cold is circaseptan. ”
The medical journal, Vivo, revealed that melatonin, a natural hormone that helps us relax, is released not only on a daily rhythm, but on a weekly rhythm as well. Even more amazing, as our teeth grow, lines are formed on the dental enamel about every seven days, leaving a dark mark.
So Why 7 Days?
God knew all of this because He created us and gave us a seven-day weekly cycle. However, today we take the seven-day weekly cycle for granted.
In ancient times, it was the Jews who carefully preserved one day as a period of rest – a “Sabbath” during which they would focus on spiritual things. And as the centuries passed, Roman society accepted the Jewish Sabbath, and the physical and mental rest it provided.
Seventh-day Adventists are a denomination of Christian believers who observe the seventh-day Sabbath. Studies have found they tend to live seven to 10 years longer than the average citizen. It appears they’re simply in sync with the rhythm of life.
Scientific tests done on the body processes has shown that for everyone, regardless of religious beliefs, the heart beats more slowly on Saturday than on any other day of the week. Even if a person has the day off on another day of the week, the heart still beats more slowly on Saturday.
It’s my belief the reason for the seven-day cycle is explained in Exodus 20:11, “In six days the Lord made the heavens and the earth, the sea, and all that is in them, but he rested on the seventh day. Therefore the Lord blessed the Sabbath day and made it holy.”
I believe God put rhythms within us that are in sync with the internal logic of our bodies.
When we experience this seventh-day rest from physical work and take time to experience a spiritual renewal, our bodies are in harmony with our natural biological clock which was placed inside us by our Creator.