Think Extensively About the Factors Responsible for Bone Health: BMD is influenced by multiple factors including nutrition, exposure to sunlight, ethnicity, physical activity and protein intake. Low weight, or low body mass index (BMI), is a well documented risk factor for future fracture, whereas a high BMI appears to be protective. Exercise is an important dynamic factor that imparts mechanical loading on a living bone tissue. The bone is subject to constant alternation of loading during exercise. It adapts to this alternation by changing its mass and skeletal geometry. Physical exercise is important for maintaining physical fitness and can contribute positively in maintaining a healthy weight, building and maintaining healthy bone density, muscle strength, and joint mobility, promoting physiological well-being, reducing surgical risks, and strengthening the immune system. This book will help to study association in strength, BMI, physical activity, and bone girth with BMD in different age groups.