Reference; http://seino-1987.jp/blog/6665.html
Modified and translated by CFJA
Exercise is important, but it is also necessary to consider the time of day when exercising. It is common to see people walking or running late at night, but this behavior is often observed in individuals who later visit clinics complaining of knee or lower back pain.
Humans are not nocturnal animals. Most animals rest after sunset, and for good reason—nighttime is when the body recovers energy for the following day. The most suitable time for exercise is during the daytime. By following this principle, one can minimize the risk of exercise-related injuries or health issues.
The Ideal Time for Exercise
Among daytime hours, morning is considered the best time. Specifically, the period between dawn and before breakfast, as long as it is not too cold, is ideal. In the morning, the air is fresh and rich in oxygen, making it easier for the body to absorb it efficiently. Additionally, after a full night’s rest, the mind is stable, the mental state is positive, and concentration levels are high—all of which contribute to a better exercise experience.
The optimal time for exercise varies depending on location and season, but in general, between 6 AM and 11 AM is recommended. However, afternoon exercise is also acceptable. Humans are naturally active while the sun is up, so exercising until around 5 PM poses no issues.
For example, in Toronto, daylight extends until 9 PM in June, allowing for a wider range of exercise-friendly hours. Therefore, the appropriate time for exercise should be adjusted based on regional and seasonal conditions.
The Biggest Concern: Exercising After Sunset
The biggest concern is exercising after dark. If nighttime is the only time available for exercise, it is important to carefully consider the frequency and duration of these sessions. The next section, “How Long Should You Exercise?”, will discuss this topic in more detail.
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