Walking is a popular form of exercise that has various health benefits. There are different types of walking like strolling, brisk walking, power walking, Nordic walking, hiking, chi walking, marathon walking, and race walking. Walking can help burn calories, strengthen the heart, lower blood sugar, improve mood, boost energy, and ease joint pain. Safety tips include walking in designated areas, wearing reflective clothing if walking at night, and staying hydrated. Medical limitations are that the maximum daily walking time is 30 minutes and it may not achieve advanced fitness goals or burn a high number of calories per hour.