Abstract: An elastic exercise device which provides varying resistance to exercise to enable a user to adjust the resistance depending on the strength of the muscles being exercised. The resistance to exercise is varied by selectively adjusting and securing the length of a resistance member. The present invention is directed to a flexible host member carrying a resistance member. The resistance member has an adjustment section which extends along at least length of the flexible host member and is accessible for adjustment. A securing member is attached to the adjustment section, whereby the length of the resistance member is secured alter being adjusted. The length of the resistance member is shortened by accessing the adjustment section of the resistance member, drawing a loop portion of the adjustment section, wrapping the loop portion around or against the flexible member, wrapping the securing member around the flexible member and then fastening the securing member.