Researchers from the University of Lahore in Pakistan and the University of Edinburgh in the UK have found that aligning exercise with an individual’s natural body clock significantly boosts cardiovascular and metabolic benefits.
The study, published in the British Medical Journal, followed 150 adults aged 40 to 60 who had at least one cardiovascular risk factor. Participants were classified as morning or evening types using a well-established questionnaire that takes about five minutes to complete and consists of 19 questions.
Those who performed aerobic exercise during their preferred time of day—whether morning or evening—showed greater improvements in health markers such as cholesterol and blood pressure compared to those who exercised outside their natural rhythm.
The findings highlight the importance of chronobiology in fitness routines, suggesting that personalized timing based on biological preferences may enhance the effectiveness of exercise programs.
This approach, referred to as “chronoexercise,” shifts focus from merely how much one exercises to when It’s done in relation to whether a person functions better in the morning or evening.
A similar study conducted by researchers in Spain and published in Open Heart reinforced these results, showing that sedentary individuals with cardiovascular risk factors who exercised in sync with their body temperature and chronotype experienced better outcomes over a 12-week period.
Experts note that hormonal fluctuations, sleep cycles, and individual metabolism—all influenced by the internal clock—play a key role in how the body responds to physical activity at different times of day.
Understanding one’s chronotype may help people tailor their fitness routines for greater consistency and effectiveness, potentially improving long-term adherence to exercise regimens.
As interest grows in aligning lifestyle habits with biological rhythms, tools like the morningness-eveningness questionnaire offer a simple, accessible way for individuals to identify their optimal exercise window.
