Everything you need to know about Rory McIlroy's training aid: What it is, where to buy it and how it can help your game.

Rory McIlroy is in India for the DP World India Championship and has been spotted using a bizarre training aid on the range ...

I first tried the Norwegian 4x4 workout a year ago, and since then, it has become a staple of my fitness routine. I don't do it every week (some folks do), but it's a workout I keep returning to ...