It is thought that exercising in empty stomach may increase the appetite resulting in excessive calorie intake. But, the researchers took active male participants to perform a bout of treadmill exercise at 10am, either after they had eaten breakfast or in a fasted state having not eaten since the evening before.
After the exercise all participants were given a chocolate milkshake recovery drink. Later in the day, participants were provided with a pasta lunch which they were asked to consume until they felt 'comfortably full'. Their lunchtime consumption of energy and fat was assessed and calculated, taking into account the amount of energy and fat burned during the morning period.
It was found that those who had exercised in the morning in empty stomach did not consume additional calories or experience increased appetite during the day to compensate for their earlier activity.
They also found that those who had exercised in a fasted state burned almost 20% more fat compared to those who had consumed breakfast before their workout. This means that performing exercise on an empty stomach provides the most desirable outcome for fat loss.
Additionally, in morning the outdoor air is more fresh than the evening time. The sun is pleasant and the exercise is more refreshing. A refreshing shower after morning exercise will always be a boost to mood in office.