Low balls at the kitchen line separate the players who bend from the players who reach. When a dink comes in low and you leave your legs straight and drop the paddle head down to scoop it, the shot loses its softness — it comes up jerky, it pops, and it feels like a rescue every time. The ball wasn't the problem. Your knees were, or rather weren't.
The legs are the elevator
Here's the principle the whole soft game hangs on: to hit a low ball softly, get your body low, not just your paddle. When you bend your knees and lower your whole frame to the ball's height, your paddle arrives at the ball level and square, and you can push it gently from there — same clean motion you'd use on a ball at your waist, just lower down.
When you keep your legs straight and reach the paddle down instead, everything changes. Your paddle face has to tilt open to get under the ball, your wrist has to do the fine work, and the shot becomes a scoop — a flick with a bad angle. Scoops pop up and scoops net; there's no soft, repeatable version of a scoop, because the good version requires the knees the scoop skipped.
Think of your legs as an elevator. On a low ball, ride it down to the ball, hit, and ride back up. The arm stays quiet the whole time. Reaching down with a straight body is taking the stairs when the elevator was right there.
What CoachVision measures
Filmed from the side, CoachVision reads how bent your knees are at the moment you meet the ball and reports it as knee bend at contact, in degrees. The number runs backwards from intuition: a smaller angle is a deeper bend, and a near-straight leg — up around 180 — is the scoop, reaching down with the arm instead of the legs. Visible knee bend at contact is what soft, low dinks are made of.
This is a side-view read — from behind, the knee's bend flattens along the camera axis and can't be measured, so film from the sideline when you want it. And the app reads the moment your hand moves fastest as "contact," a frame either side of the true strike, which is right where you meet the ball on a dink.
The drill — Shadow Third-Shot Swings
Grooving the bend is easiest with no ball at all. From an athletic stance, sink into your knees to get down to an imaginary low ball, then make a soft low-to-high push and finish calm at shoulder height — legs doing the lowering and the lifting, arm just along for the ride. Fifteen slow reps, daily.
No ball means no rescue instinct, so you can build the shape clean: bend to the ball, push softly, rise. Do it slowly enough that you can feel the difference between lowering with your knees and reaching with your arm.
Film a few dinks from the side afterward and check your knee-bend-at-contact read — a deeper bend where you meet the ball is the scoop turning back into a soft push. Ride the elevator down to low balls, and your soft hands stop deserting you the moment the ball drops.