An apparatus includes a brace being mounted on a person's body part and having a hard fitting surface. The apparatus also includes a load device, a support, a securing member, a brake, a switch device, and a soft film. The load device has a hard receiving surface receiving the fitting surface of the brace. The support movably supports the load device. The securing member secures the fitting surface to the receiving surface and enables the load device to move and follow movement of the person's body part and the brace against resistance applied from the support. The brake limits movement of the load device. The switch device switches operation modes of the apparatus, at least, between a free mode and a limiting mode. The soft film is arranged between the receiving and fitting surfaces for smooth movement of the person's body part on the load device in the limiting mode.