The mechanical specification of the golf stroke.

TIGHTER GOLF: The Five-Bar Stroke models the golf stroke as what it is: a spatial five-bar linkage, closed by both hands on the club and carried by the body's pivot. From that model it derives a complete assembly procedure, drawing on mechanical engineering, physics, biomechanics, and kinesiology, and organized under three conditions that must hold together: Balance, Constraint, and Alignment.

The book is built for the body that has to make the stroke. Every procedure answers to safety first, then effectiveness, then efficiency, and each is solved for the golfer's own anthropometry.

Homer Kelley's The Golfing Machine cataloged the stroke's components with extraordinary precision, and Kelley said plainly that the detail his handbook could not hold would have to come later. TIGHTER GOLF takes up that invitation: Kelley's components (Hinge Action, Hitting and Swinging, the Power Accumulators, Impact Fix) are derived from first principles and integrated with the biomechanics of the body that executes them.

The result is one coupled system, assembled as a procedure rather than a list of positions. Every calibration in the book ends in a condition that is either satisfied or not, and every condition can be verified before the stroke begins. When those conditions hold, consistency is assembled before the club moves: the stroke repeats by construction, not by timing, and precision and accuracy are built on that repeatability.

Written for instructors and serious students who want to know why the stroke works, not another set of tips.