There are two ways arms go through a T. Some arms SNAP there — they travel fast, stop hard, and hold a clean line like the position was carved. Other arms swim there — they drift up, wobble around shoulder height, and sag a little before the landing. Same position on paper. Completely different jump on video.

The swim is the lazy T, and it's worth being honest about what causes it, because it isn't laziness at all.

Sharpness is a separate skill

Most athletes assume arm sharpness comes along for free once you know where the T is. It doesn't. Hitting a position and hitting it SHARP are different skills, the same way knowing a word and pronouncing it crisply are different skills. Sharpness has its own ingredients: arms level with the shoulders (a T that wilts even slightly below the shoulder line reads soft), a hard stop instead of a gradual arrival, and a genuine freeze — the position held, not passed through.

In the air, all of that has to happen in a fraction of a second, mid-jump, while your legs are doing their own demanding work. No one develops that under jump conditions. It gets developed on the ground, where you have all the time in the world, and then it transfers.

Here's the transfer rule that governs this whole sport: the arms you rehearse are the arms you get. Swim through positions casually in practice, and the air version swims. Snap and freeze a hundred times on the floor, and the air version snaps — automatically, because it's the only version your body knows.

One honest note on what video can and can't check: leveling, timing and the snap show up clearly on a front-on clip — CoachVision measures your arm score from exactly that view, and it's a satisfying number to watch climb. What no camera reads well is your hand shape; whether your fists are clean is a detail for your coach's eyes at practice.

The drill — Mirror Arm Snaps

Face a mirror. Run the sequence: clasp, high-V, T. Hit each position sharp and freeze it for a full second before moving to the next. That freeze is the entire drill — a second is much longer than it sounds, and it's exactly the discipline a soft T is missing.

The mirror is your coach here, and it never lets a lazy T slide by. Arms level with the shoulders — check it, don't feel it, because "feels level" is usually a couple of degrees droopy. Wrists strong and in line. Eyes forward, chest proud, because sharp arms on a slumped body is only half a picture.

Do 3 rounds of 10 snaps. Speed comes AFTER precision: the first round can be deliberate, the last round should crack. If a position arrives mushy, that rep didn't count — reset and hit it again.

Ten days of this and something funny happens: you stop thinking about your arms entirely. Mid-jump, the T just appears — sharp, level, frozen — because you built it somewhere easier and brought it along. That's how every sharp jump you've ever admired was made.