There are so many reasons to exercise [1], from deeper sleep to boosting your immune system, but I have a few more work-related reasons to add the list. Exercising before or during your workday will improve your productivity [2]. Adding workouts to your workweek doesn't just help your boss; exercising on a workday helps with stress management and can make you happier. If you can't fit in a workout before heading to the office, schedule one during your lunch hour. Instead of a coffee break, take an activity break. Who knows? You might just start to whistle while you work.

Source [3]