Abstract: An exercise system for use in an automobile or other vehicle comprising a generally flat, elongate door jamb member, a generally flat, elongate seat attachment member and at least one resilient tension member. The door jamb member includes an enlarged portion, with a thickness greater than the distance between the vehicle door and the vehicle door frame when the vehicle door is closed, on a first end zone of the door jamb member so as to prevent the first end zone from being pulled between the vehicle door and the vehicle door frame when the vehicle door is closed, and a magnetic pad on the outer end of the first end zone of the door jamb member structured and disposed to removably secure the outer end of the first end zone of the door jamb member to the vehicle roof. The seat attachment member includes a buckle, structured to secure a first end of the seat attachment member to the second opposite end of the seat attachment member, thereby securing the seat attachment member around the vehicle seat.