Diabetes Mellitus (DM) is a metabolic disease with characteristics of hyperglycemia that occurs due to abnormalities in the secretion of insulin. the action of insulin or both. Diabetes is known as a silent killer because when it is known that complications have occurred. Complications can be prevented through a good understanding and knowledge of diabetes. https://fitnessgravesyardes.shop/product-category/heart-rate-board-reciever/