Walking is perhaps the best low impact exercise most people can enjoy. A daily outing rewards with many benefits. Some health improvements are noticeable while others are subtle. You'll soon recognize, for instance, that walking improves strength and stamina but less obvious is how walking may strengthen your heart, moderate blood sugar, boost your immunity and promote longer life. In this era of Fitbit and fitness at all ages one might think it's important to walk fast to gain significant benefit yet each speed is valuable to our health in its own way. Speed, like distance, is a variable you control. Learn about the benefits of each speed and vary your pace for a rounded workout.