There are many ways you can maintain your health while still working a desk job. Part of that includes undoing the impact using a keyboard and mouse all day has on your wrists and forearms. A few simple stretches might help your wrists feel better.
Bari Lieberman at Refinery29 shares a list of possible stretches that can help, including this useful one:
This move reverses the grip of your wrists and forearms on the keyboard and mouse. Place both palms on a flat surface (the floor, a table, or a chair). Now, flip your hands so that your thumbs are on the outside and your pinkies are on the inside. Adjust the pressure and angle so that your palms are fully in contact with the surface. Exaggerate the spread of your fingers, and attempt to migrate your forearms and elbows toward your body to increase the stretch. Hold for 10 breaths.
You can easily do this simple move at your desk or at home. For more exercises you can do to counteract the effects of working at a desk for a majority of the day, check out the full post linked below.