【Content Introduction】 This book provides a detailed explanation of the health benefits gained by strengthening the core. It introduces exercises that are helpful for tightening the abdomen and preventing lower back pain, making it appealing due to its practical content. 【About the Author】 The author, James Shuichi Nakano, is a fitness expert with a proven track record, having written many books. His training methods, based on his guidance, are highly reliable and supported by many people. 【Target Audience】 Recommended for everyone who is health-conscious. Especially for those suffering from lower back pain or body shape concerns, this book offers practical advice. - Title: Strengthening Your Core: "No More Belly Bulge," "No More Back Pain" - Author: James Shuichi Nakano - Publisher: Daiwa Bunko - Genre: Health & Medicine - Condition: Good Thank you for viewing.