Standing up to tone your abs is a legit way to work your entire core without yanking your neck or relying on your hip flexors, the way you might during an on-your-back exercise.
You can add a hand weight or a water bottle to the exercise if you want to make it more challenging.
Step 1: Stand with your feet three feet apart and bend your knees slightly.
Step 2: Clasp your hands in front of you at chest level.
Step 3: Keep your hips still as you bring your hands down to your left hip and "paddle” backward.
Step 4: Raise your hands back up to chest level and then paddle toward your right hip.
Step 5: Do ten alternating reps for each side.
See the complete library of Workplace Fitness exercises.