Abstract: A combination stance limiting and muscle flexing device particularly useful in karate training. The device consists of a flexible strap which is adjustable in total length, connected at opposite ends by means of swivel connectors with cuff assemblies to be worn on the legs or arms of an individual. The flexible strap is made up of two length-adjustable portions connected by an elastic portion. The length-adjustable portions form loops at their free ends which receive the swivel connectors and are adjusted by folding the strap material over on itself at selected positions along the body of the strap material. The strap material is made of Velcro material which easily attaches and detaches to allow for easy adjustment. The elastic portion of the strap allows a limited stretch capability of about two inches.