Health and Fitness Magazine both offer some free resources for quick stomach-flattening exercises. These exercises may be done at home to help strengthen and tone the abdominal muscles.
In its flat-belly workout slideshow, Health offers a selection of five abdominal muscle moves that may be performed individually or together as a short workout. The moves offered in this slide show include plank, boat and scale pose. These moves are performed without weights.
The abdominal workout on Fitness Magazine is roughly 10 minutes in duration and consists of five moves, including pike and extend, standing side crunch, and lunge and twist. These moves are best performed using light hand weights.