Backhand grip in badminton: how to switch to the thumb grip, when you need it and why a relaxed hand gives you more control, with a short milestone test.
The backhand grip is the grip you take for shots on your non-racket-arm side: you turn the racket slightly in your hand until your thumb lies flat on the broad side of the handle – so the thumb becomes the pressure point and the racket face meets the shuttle correctly. You need it for backhand net shots, backhand lifts and later for the overhead backhand.
The honest answer first: there are hardly any studies on the grip change itself; the technique is teaching consensus. There are, however, hints about what good players do with the hand. In a measurement with pressure sensors in the grip, performance players showed a more precise, focused and efficient grip compared with beginners, especially on control-based shots [1]. In a small preliminary study with a sensor glove on four top players, the thumb made the biggest contribution on the backhand straight shot, followed by the index finger [2].
Expect two to four sessions until the change works without looking – an experience value, not a study figure.
Hold the racket in the forehand grip. The racket edge points up, the V between thumb and index finger sits on top of the handle edge. That is your base.
Use your free hand to turn the racket slightly further in your gripping hand so that your thumb lies flat on the broad side of the handle. Coaches speak of an eighth to a quarter turn; what matters is the thumb position, not the degrees. The other fingers stay loose. That is teaching consensus.
The thumb presses lightly against the broad side, the index finger supports. The other three fingers only hold. Do not be tempted into a "stranglehold": on the backhand, less pressure means more control.
Switch ten times between forehand and backhand grip without looking. Then do ten backhand shadow swings in front of the mirror. Make sure the racket face points at the target at contact.
Rally 20 very easy backhands to the net with a partner. Move on when you start in the backhand grip on at least 15 of them and the thumb does not slip. Film yourself from the side.
Plan 15 minutes: 3 minutes of grip changes without looking, 5 minutes of backhand shadow swings in front of the mirror, 7 minutes of very easy feeds to the net with a partner. Film one run at the end and check one thing only: does the thumb lie flat? This is an experience routine, not a study recommendation.
In a match you change constantly: forehand grip for overhead and forehand shuttles, backhand grip for net and defensive shuttles on the backhand side. Get used to returning to a neutral in-between position after every shot. From the neutral position you change faster than if you stay in one of the two grips. That is teaching consensus, not evidence.
Do the "paper strip test". Put a strip of paper under your thumb. If you can hardly pull it out during a relaxed swing, you are pressing too hard. A practice trick without study evidence, but an honest self-test.
The thumb grip for shots on the non-racket-arm side: the thumb lies flat on the broad side of the handle and becomes the pressure point. There are hardly any studies on it; the technique is teaching consensus.
As soon as the shuttle comes to your backhand side, ideally on the move. You need it most in net play and defence. That is teaching consensus.
Fairly loosely. In one measurement, performance players showed a more precise, more efficient grip than beginners [1]. Constant hard pressure is therefore no sign of skill.
Yes, as soon as you play shots on the backhand side. Without the change the face tilts and the shuttle loses direction. That is teaching consensus, not evidence.
Usually two to four sessions, depending on practice. That is an experience value, not a study figure.
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