Question: ab exercises you can do at your desk at work?
Answer: Standing Cross Crunch. Standing at your desk with your feet flat on the ground, place your hands on the back of your head. ... 
Standing Side Crunch. Standing at your desk with your feet flat on the ground, raise your right hand toward the ceiling. ... 
Standing Toe Touch. ... 
Desk Plank. ... 
Sprinkler Twist.