<Li> The extended high step, similarly to the chair step, involves the thigh being parallel to the ground and perpendicular to the body, but instead with the shin extended outward at a forty five - degree angle from the body and with toes pointed downward . The leg is then driven quickly back to the ground while the other leg repeats in this fashion . </Li> <P> An integral part of this style of marching is known as stop action, meaning that all movement ceases momentarily at the apex of each step . This requires a band to have a great deal of stamina, though is effective visually . High step marching is often accompanied by a horizontal swing of the player's body and / or instrument . </P> <P> The glide step, also commonly known as the roll step, involves bringing the heel gently to the ground with the toe pointed up, and then rolling forward onto the toes before lifting the foot to continue forward . While marching to the rear, the weight is placed continually on the ball of the foot with the heel elevated . This style is used by both marching bands as well as drum and bugle corps . The style, in comparison to high step, gives drill formations a more fluid appearance, allowing for better control of more difficult formations and various styles of music . With this control also comes the ability to perform a much broader range of tempos . Proper execution of a roll step gives a player marching at 40 beats per minute the same smooth tone as a player marching at 180 . The roll step allows for much better control of the upper body, and thus better control of the air support needed for playing . </P> <P> Some bands, and a select few drum and bugle corps, use a bent - knee variant of roll step, usually known simply as bent knee, in which the members roll from heel to toe but lead the next step with the knee instead of the foot, then planting the heel of the next foot by straightening the leg . </P>

List of musical instruments in a marching band