Golf swing training device and method

A golf swing training device and method. First and second tension members, such as tension cords, have first ends respectively attached to opposite sides of the upper body of a golfer and opposite ends attached to anchor points. The first tension member extends in a substantially rearward direction and the second tension member extends in a substantially forward direction from a shoulder line of the golfer when the golfer is in a ball address position. The tension members provide equal resistance to rotation of the shoulders and torso of the golfer throughout the backswing, and also provide an equal release of the resistance through the downward swing, thereby encouraging consistent and fluid golf swing mechanics.