An exercising apparatus for exercising muscles in the abdominal region of a user's body may include a stationary primary body support configured to support upper portions of the user's body including the abdominal region. The primary body support may include a primary body support surface oriented to support a user's back in a rearwardly inclined position and a secondary body support surface for supporting the user's buttocks. A movable carriage may be configured to be engaged by the user's lower leg portions and may be movable along a substantially linear path extending generally toward and generally away from the secondary body support surface. A resistance application assembly may be configured to apply an adjustable degree of biasing force to the carriage in a direction generally away from the secondary body support surface to resist movement of the carriage toward the secondary body support surface.