Bruce Algra's incredibly informative Back Workout Poster is designed to help men and women enhance the complete back muscles needed to strengthen your upper and lower back. This beautifully designed workout routine highlights key muscles involved for each exercise in bright colors insuring optimum toning and strengthening of your back. Algra’s Co-ed Back Workout Poster highlights the optimal exercises for the male and female body through clear illustration. This body building program is a terrific aide to attain that great looking back and physique.