Loose as a goose: why arm relaxation unlocks power

Power and relaxation sound like opposites, but in tennis they are directly linked. A tense arm slows the racket head down. A loose arm lets it accelerate. The players who hit the biggest forehands on tour are often the ones whose swings look the most effortless.

Elbow position and spacing

One of the prerequisites for a loose swing is the elbow sitting up and away from the body during the backswing. When the elbow is tucked in or cramped, there is no room for the arm to accelerate freely. Spacing the elbow creates the conditions for the hand to lag behind the forearm as the body rotates through the shot.

The lag of the hand

The lag is what produces the whip-like acceleration through contact. As the body rotates, the arm follows, and the hand trails behind the elbow before snapping through at the last moment. This lag cannot be manufactured consciously. It is a consequence of muscle relaxation and good timing. If the arm is tense, the lag disappears and the swing becomes rigid.

Rhythm: slow to fast

When the arm is loose and the lag is present, the rhythm of the swing changes. The backswing is slow and relaxed. The acceleration happens through contact, with a spark of speed at the hitting zone. Slow preparation, explosive contact. That is the rhythm to aim for, and it only works when the arm is free to move.