The HaraMeter® is a biofeedback device designed to measure expansion and contraction of the lower abdomen (hara in Japanese). Development of the hara is critical in Zen training and in training in the Japanese martial arts. These disciplines require a form of deep abdominal breathing, referred to as hara or tanden breathing. The HaraMeter® provides feedback that can help accelerate and deepen the learning of this kind of breathing. For more information about the importance of hara and on how to use the HaraMeter®, read hara development blog.