As badminton star Tony Gunawan whips his arm through a shot, his Yonex Voltric Z-Force racquet pulls off a neat trick. On contact, materials inside the frame filter out both high- and low-pitched ...

That’s where clubs like the Yonex Z-Force irons might come in handy. Part of a category of clubs called game improvement clubs, the Z-Force are designed specifically for golfers with club head ...