A book introducing 30-second stretching methods to relieve stiff shoulders and lower back pain. - Title: The Power to Loosen: Bone Stretching - Author: Takashi Matsumura - Theme: Relief from stiff shoulders, lower back pain, and knee pain - ISBN: 978-4-16-390299-9 - Features: Stretches that provide relief in 30 seconds - Effects: A revolution in stretching to improve body shape Thank you for viewing.