NOVELTY - A seat panel has a counterbalance mechanism, a pelvis/thigh holder, a pelvis back holder, and footstool provided with DC motors (30,40) to place the feet, hold the pelvis and thigh of the user. A back panel and a counterbalance mechanism are installed to allow interlocking with an amplifier shaft. An exercise load controller has main CPU and a sensor CPU to receive signals from encoders, a load cell and an electric generator. It has a DC power motor with sub-functions and an integrated controller for controlling the power motor, a power clutch, and the amplifier.    USE - For lumbar joint rehabilitation exercise and similar exercise.    ADVANTAGE - The exercise load controller amplifies and uses the inherent motive power torque with a rated capacity produced by a DC motor and the basic brake power of a power clutch through an amplifier so as to appropriately harmonize the motive power with the exercise load for application to various rehabilitation exercise apparatuses that require stability and efficiency. When it is used for holding for exercise, the exercise load controller controls the holding means to make it possible to perform automatic adjustment and selection of the holding pressure and exercise load control force according to real-time electric and electronic changes such as changes of current, voltage, power, and resistance using feedback. It also allows adjustment by the operator to suit the state or situation and it is thus possible to dynamically handle the exercise load that is based on the flexibility, which represents the exercise angle range or muscular strength of the user. This maximizes the exercise efficiency. The apparatus makes it possible to perform control with an accurate holding pressure to suit the physical state and the intensity of exercise of the user for a more stable and efficient exercise.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an exercise load controller.    DESCRIPTION OF DRAWING(S) - The drawing is a perspective view illustrating main parts of a pelvis/thigh holder employed in the rehabilitation exercise apparatus when it is separated and assembled.    DC motors (30,40)    T-bar (31)    Pressure pad (32)    Link structure (33)    Screw rod (34)