[Machine Translation] Stretching is not just a matter of time! Target the area of discomfort and reset it safely. On the cover are Miku Kanemura and Hina Kawada of Hyuhizaka 46. Did you know that there are actually many different types of stretching exercises that you may be practicing, each with its own advantages and disadvantages? Static stretching, which is the royal road to slow and gentle stretching, is not recommended before a workout and may not work the targeted muscles, while ballistic stretching, which is done with a reaction force, is ideal for before a workout, but is not recommended afterwards as it can cause muscle soreness. The Active Isolated Stretch (AIS) is a safe, targeted stretching technique that can be performed before, after, waking up from, or going to bed at any time. It is called the "2-second stretch" because it takes two seconds to contract one muscle and stretch its counterpart. There are 24 stretches for 12 different parts of the body (neck, shoulders, chest, arms, abdomen, back, buttocks, hip joints, etc.) that address problems such as improving hunchback, preventing stiff shoulders and lower back pain, and so on. This book introduces in an easy-to-understand manner the secret methods that have been known among conditioning and training professionals and have been monopolized by the experts. In the centerfold, a basic Pilates menu is introduced to ensure that the body is kept in good shape through AIS stretching. In addition, the book includes a dissection of the "World's Greatest Stretch," which is called the strongest stretch, and "Sneaky Stretch," which can be done secretly in your daily life, according to popular illustrator Mina Sakita. Miku Kanemura and Hina Kawada of Hyuhizaka46, who appear on the cover of the magazine, also try out some pair stretches. This is a book that will help you discover new aspects of stretching that you have been practicing casually until now.