'Like' Fitness instructor Russ Howe demonstrates how to perform Side Bends correctly and discusses why they are one of the best exercises for developing your six pack abs.br br Working mainly the oblique muscles on the side of your abs, side bends are great for improving tone and strength within the abs and take little time to show results.br br More free tips from Russ each week, via 'liking' the facebook page, search facebook for Russ Howe PTI.