If you sleep in or sit around in an office all day, you are not burning many calories. If you work out later in the day it is beneficial, but if you can get your workout in earlier you are going to get a lot more benefits for your efforts. If you do workout in the evening, at least do what you can to walk or get moving in the mornings.
Luckily, there are potent herbal extracts which are known to effectively combat these problems--naturally.