Sitting at a desk all day is not good for fitness, so here are some exercises you can do at your desk without leaving your cube: Wide-angle push-ups at your desk can help tone the sides of the chest. Place hands on the edge of the desk and walk back, keeping knees locked and together while lowering your chest to the desk. Wall-sits with your back against the cubicle wall and legs bent at a right angle work the legs, hips, and glutes. Push your butt against the wall and hold for 15-60 seconds, extending one leg to increase difficulty. Ankle taps while seated strengthens the thighs. Tap one foot to the floor in front