Harmonica AerobicsA 42 Week Workout Program for Developing, Improving, and Maintaining Harmonica Technique Harmonica Aerobics offers a 42 week regimen to help you play to your full potential. Whether you're a beginning or more experienced player, it's all here. The exercises include playing single notes and chords, bending notes, chord progressions, rhythmic precision, improvisation, strengthening your mouth and tongue, increasing your lung capacity, and much more,