Bowers are an advanced multi-plane pushup variation that I often use with my stronger athletes. They build tremendous strength throughout the entire shoulder girdle, chest and arms, as well as the lower back and abs.
Follow the link for a demonstration video, performance guidelines and detailed progressions for developing this exceptional movement:
http://gymnasticbodies.com/forum/viewtopic.php?t=418
Yours in Fitness,
Coach Sommer
www.GymnasticBodies.com