In this edition of Play Smart, we explain the tiny new training aid Rory McIlroy has been spotted using lately.

Swing fans, like this one from Golf Training Aids, use durable fins to create resistance in the downswing. Although these devices don't have quantifiable stats you can track, they do provide immediate ...

Swing fans, like this one from Golf Training Aids, use durable fins to create resistance in the downswing. Although these devices don’t have quantifiable stats you can track, they do provide ...