This is "Flexibility Course for Stiff Bodies (Shumi Dokki!)" (Author: James Shuichi Nakano). [Product Condition] - [No noticeable scratches or dirt, in relatively clean condition] - [No writing or folds] [Product Description] This is a stretch guide book published as a text for NHK E-tele's "Shumi Dokki!", aimed at people with stiff bodies. It clearly explains stretching methods that can be easily practiced even by those who struggle with stiffness, such as inability to bend forward or spread legs, or experiencing shoulder stiffness and lower back discomfort. The content helps you understand the mechanics of your body while aiming to improve flexibility and alleviate everyday discomfort, making it a recommended book for exercise beginners. (Rakuten Books) [Shipping] - Will be shipped with waterproofing. [Other] - As this is a used item, please refrain from purchasing if you are concerned about minor details. - Please feel free to comment if you have any questions.