Effectiveness in fat reduction and metabolism
Exercising in the morning (6-8 am), especially on an empty stomach, helps the body burn fat more effectively due to the low glycogen content in the liver.
Exercising before breakfast can increase fat oxidation for 24 hours. Women exercising in the morning also tend to reduce belly fat better (about 7% higher than exercising in the evening).
Meanwhile, exercising after meals (after 8 pm), in the evening makes the body prioritize burning carbohydrates, reducing the effectiveness of fat burning. Light exercises before bed can support maintaining metabolism, but heavy exercises easily have a negative impact on the next day.
Quality of sleep
Morning exercise helps reset the biological clock, improve the nervous system and help sleep better at night. People who maintain this habit often have a more stable sleep.
Conversely, high-intensity exercises close to bedtime (such as jogging, HIIT) stimulate the sympathetic nervous system, making it difficult to sleep, not sleeping deeply, and even affecting heart rate.
You should finish heavy exercises at least 3-4 hours before bedtime. In the evening, you should only do light exercises such as yoga, stretching, or walking.
Hormones, muscles and strength
High Cortisol helps burn fat, suitable for cardio or light exercise.
High body temperature, testosterone is more favorable for muscle development, strength and endurance performance reach peak.
Cardiovascular health and overall
Exercising in the afternoon/evening can bring better benefits in reducing cardiovascular risk and mortality rates (especially in men and the elderly).
However, exercising too early (before dawn) or too late (behind bedtime) can put pressure on the heart and disrupt sleep.
Psychology and sustainability
Creating a feeling of early completion, helping to maintain positive energy and discipline throughout the day.
Helps reduce stress, but if it affects sleep, it will cause fatigue and make it difficult to maintain for a long time.
