Abstract: Provided is a soft golf club head that forms a striking surface with a plurality of strings fixed to a body of the head and a tension adjusting screw to enable adjusting of string tension, so that shock transferred to a golfer is reduced, flight distance of the golf ball can be adjusted, and a broader demography can enjoy golfing with less restrictions.

Abstract: Provided is an early rehabilitation training system that increase the intensity of patient rehabilitation training to shorten the time it takes for patients to progress to a secondary rehabilitation training stage by allowing patients incapable of self-ambulation to be artificially rehabilitated in a prone, bed-ridden position. The system includes a treatment bed (2) configured with a mattress (2a), a base (2b) disposed below the mattress (2a) and coupled through a hinge to one end of the mattress (2a), and a tilting unit (2c) provided between the mattress (2a) and the base (2b) to adjust an upright angle of the mattress (2a); and a rotating unit (10) provided below the mattress (2a) of the treatment bed (2) to secure a patient's feet and provide artificial exercising of the patient's feet through gravity when the upright angle of the mattress (2a) is changed by the tilting unit (2c).

Abstract: Provided is an exercise fitness machine that can be varied in weight in a minute unit in accordance with a body condition of a user and easily transformed in accordance with a developing portion of the body, thereby maximizing convenience in use and efficiency of exercise. The exercise/fitness machine includes a base frame, a muscular strength member that is provided on an upper end of the base frame to develop muscular strength of an upper or lower body of a user, and a weight varying unit provided between the base frame and the muscular developing member and including a damper containing magnetorheological fluid to vary a weight sense in accordance with a user's selection.