A training device for a gliding sport athlete trains the athlete to have the proper knee bend for gliding sports such as ice skating, inline skating, skiing, etc. The device includes a belt for securing about the waist of the athlete, the belt having a front portion adapted to be worn adjacent the navel of the athlete, a right side portion adapted to be worn adjacent the right hip of the athlete, and a left side portion adapted to be worn adjacent the left hip of the athlete. A pair of foot attachments are adapted to be fastened to a front portion of the respective feet or footwear of the athlete. One end of a first pair of cords is connected to the belt at a position between the front portion and the right side portion, and another end connected to one of the foot attachments, and a one end of a second pair of cords is connected to the belt at a position between the front portion and the left side portion, and another end connected to another of the foot attachments. Each of the cords has an unstretched length less than a length between the athlete's waist and feet, each pair extending between the belt and a respective foot attachment on each side of the leg bent at the knee. The stretched cords apply a force to urge the athlete's knee into a bent position.