Impact on the biological clock
Exercising in the morning, especially in the sunlight, helps inhibit the hormone melatonin - the hormone that causes drowsiness, thereby helping the body wake up faster. Thanks to consuming energy during the day, the body also easily enters a resting state at night, helping to sleep better. Conversely, if you exercise at high intensity in the evening, especially near bedtime, the body may slow down melatonin secretion, disrupting sleep.
Differences in energy use
In the morning, when the body has not eaten or eats little, the amount of glycogen stored is low, so the body tends to burn fat to create energy. Therefore, morning exercise often supports fat reduction better.
In the evening, the body has been energized during the day, so it mainly consumes glycogen. Although the fat reduction effect is not as obvious as in the morning, this is a suitable time for high-intensity exercises, strength training or muscle gain because exercise performance is usually better.
Effects on stress hormones
Cortisol - a hormone that helps the body stay alert, usually at a high level in the morning. Exercising at this time is suitable for the circadian rhythm, helping cortisol increase and then gradually decrease steadily, contributing to controlling stress during the day.
At night, cortisol naturally decreases. However, heavy exercise before bed can cause this hormone to increase again, causing physical fatigue but making it difficult for the spirit to relax.
