fitness and exercise sourc - fourth edition

regular physical activity provides numerous health benefits, including a reduced risk of diabetes, osteoporosis, obesity, some cancers, and heart disease, as well as increased mental well-being, longevity, and life satisfaction. beginning a physical fitness program is important at any age, and it can provide a lifelong love of fitness in children, increased strength and endurance in adults, and improved balance and flexibility in the elderly. yet, according to the centers for disease control and prevention, almost 39% of americans engage in no leisure-time physical activity....