A device for use with an exercise apparatus consisting of at least one hanging, length- adjustable and lockable rope (10, 11) which at its lower end has a gripping means (13, 14), e.g., a gripping loop. A vibration means (12； 16) is designed, when attached via a rope engaging member (8, 9) to a portion of such rope, to impart to the rope and thus its gripping means (13, 14) a vibratory motion.
