The present invention is a mechanical assembly for single point torque adjustment, an apparatus and method of use of an improved belt for body support and for assisting body during musculoskeletal activities like heavy lifting, kneeling, bending and walking. The belt employs the single point torque adjusting mechanical assembly with an adjustable hinge along with resilient means which stores potential energy when the user alters from a neutral position and may help the body to return to the neutral position. The belt employs structure to share and direct load from head, neck and back to waist and ground. The apparatus may prevent the user from acquiring spondylitis, kyphosis or osteoporosis. The apparatus may be used for users who are subjected to frequent muscular work like bending up and down while carrying heavy loads, sitting too long, walking and the like.