From my career experience, I would firmly say that working out in the morning is best for effective and significant weight reduction.
Engaging in physical exercises early in the morning on an empty stomach quickens the burning of the stored body fats. The hormonal profile in the morning hours supports fat metabolism. The body tends to have more growth and cortisol chemicals, two factors that support the utilization and burning of the stored body fats. This utilization of stored fats for energy contributes to significant weight reduction. Working out in the morning can curb your hunger feelings and lower appetite during the day, lowering your calorie intake and leading to weight loss in the long run. Sticking to your morning workout routine aids in weight reduction.
Comparisons to Other Times
Unlike morning exercises, afternoon workouts are ideal for muscle gaining and boosting performance as the body has enough calories to support moderate to intense workouts.
Nighttime workouts can lead to weight reduction but at a slower rate. They inhibit the production of hunger hormones, ghrelin suppressing hunger; hence you eat less food.