You can also buy some dumbbells to keep at work and work your
Sit-ups, too, can be done in a chair! Keep your
abs in and your
back flat. It takes some practice to isolate your abs and NOT use your neck to raise yourself, but I taught seniors to do this. The other way to work abs from a chair is to sit back in the chair, once again with your back straight as a board and your bottom toward the edge of the chair. Slowly and with control, raise your legs and lower them.