Abstract: A flexible elastic resistance exercise cord including an outer tube having first and second ends and an inside wall, an inner safety-member tube within and extending the length of the outer tube and having inner-member end portions, each connected to a respective one of the first and second ends and an outside surface movable with respect to the inside surface of the outer tube therealong. The exercise cord also includes first and second securing balls, each within the outer tube at a respective one of the first and second ends with a respective inner-member end portion sandwiched between the ball and the inside wall of the outer tube and a handle member at at least one of the first and second ends. The safety-member tube is able to stretch at least as far as the outer tube.