Your lifestyle, including physical activities, eating habits, and daily routines, affects your overall health and risk of non-communicable diseases like heart disease and diabetes. Weight management involves balancing the energy consumed through food and the energy expended through physical activity to maintain, gain, or lose weight. One's body mass index (BMI) is a measure of weight proportional to height that can indicate health risks and whether weight gain, loss, or maintenance is needed. An active, healthy lifestyle and balanced energy intake and expenditure through diet and exercise can help maintain a healthy weight and reduce disease risks.