The built-in Easy Pulse heart rate monitor helps you monitor your heart rate throughout your workout so you get the most out of every workout. You can also get better muscle extension with the 18" stride length that allows you to take longer strides as you workout to help you develop longer, leaner muscle. To make things easy, the SMR Silent Magnetic Resistance and Digitally controlled resistance allow you to smoothly and quickly change your level of resistance throughout your workout.