Sleeping late or early can affect one’s activeness


There is a recent study of how our innate body clocks may be associated with our physical activity habits. This study says that late sleeper and late riser tend to be less active than the morning types. Moreover, early risers equal to walking 20 to 30 minutes more each day compared to late risers.

Nowadays, new science has gotten wealthier in explicating the complex roles of cellular clocks and chronotypes in our lifestyles. From that, we know that each of us contains a master internal body clock in our brains that traces and absorbs outside clues. This internal body clock controls the rhythmic release of hormones, such as melatonin that affect sleep, wakefulness and hunger.

All about chronotype

We each will develop an overall biological response to the daily passage of time, called chronotype. This is in response to the biochemical signals and genetic inclinations generated by our body.

Chronotypes are generally categorized into three groups: Morning, day or night. A morning chronotype person will feel more alert, naturally wake early and probably hungry in the morning. Furthermore, day types tend to wake later and have the highest alertness for a few hours deeper into the day. Lastly, evening types would rise as late as possible and remain low-spirited past dark.

Research shows that chronotypes are not immutable where they each have a year-long rhythm. For example, most people harbour a morning or day chronotype when young, then change to evening during adolescence. Lastly, they will return to a day or morning chronotype by middle age until senior age.

To further elaborate, our shifting chronotypes would affect our health, especially for evening chronotype people. They were more likely to get diabetes, obesity, heart disease and other metabolic conditions. Some researchers speculate that evening type of person who tends to exercise less increase the risk of developing health problems.

However, these past studies of chronotype and exercise depended almost on people’s recollections of their activeness. There may be physiological interactions between our internal body clocks and muscles that somehow cause evening type people to be less motivated.

But for practical considerations, evening types may feel most energetic at night. It could be the reason where lack of sleep that results in fatigue since evening types often struggle to adjust their body’s timing. Particularly during the COVID-19 pandemic, it would be harder for us to adjust time with the fractured work schedules.


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Prepared by: Pui Leng


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