Do you wake up feeling creaky, find yourself avoiding the floor, or notice that once-easy movements now require extra effort? Stiffness is not a sentence to a life of limitation. This clear, practical guide will help you understand what is happening inside your stiff body—whether due to aging, a sedentary lifestyle, or a medical condition—and show you the evidence-backed steps you can take to move with greater ease and confidence. Inside, you will learn how stiffness develops, what mainstream health authorities (such as the American College of Sports Medicine and the National Institute on Aging) say about safe mobility, and which specific stretches, strength exercises, and daily habits can make a real difference. You will also find guidance on nutrition for joint health, how to work effectively with physical therapists, and when to seek medical care. Written without hype or jargon, this book is designed to inform and empower, not replace your doctor. Part of The Practical Health Library.