Learn the dyno in three stages: deadpoint, small dyno, two-handed jump. Plus timing, the catch and the landing that makes the whole thing allowable.
A dyno is a jump on the wall where all four points of contact let go for a moment. The road there runs through three stages: first the deadpoint, where only one hand releases at the top of the movement, then the small one-handed dyno, then the two-handed one.
Honest assessment: most people can jump far enough straight away. What it fails on is timing and the catch — the moment your fingers have to hold the target hold at full speed. Boulderers are measurably better prepared for that: in a study of 31 advanced climbers, boulderers showed higher maximal and explosive force (rate of force development) in an isometric pull-up on a ledge and a jug than rope climbers, with similar finger-flexor endurance [1] — meaning the ability to produce force fast. You build that ability over weeks and months, not over an afternoon.
To be clear about scope: this is about the normal dyno. Paddle dynos, where you tap intermediate holds in mid-air, and competition run-and-jump moves are a league of their own with their own risk profile.
The dyno is the first move where you deliberately decide to give up control for a moment. Which is exactly why you learn it on the ground before you try it on the wall.
Checkable entry criteria before you practise dynos:
The deadpoint is the tiny moment of weightlessness between moving up and falling. You press up out of your legs and grab exactly when your body stops rising — your feet stay on the wall.
Grab too early and you are pulling yourself up. Grab too late and you are already falling.
Milestone: five deadpoints in a row where you hit the target hold without pulling up on your arms.
The drive comes from a single, fast counter-movement: drop the hips, extend explosively straight away. One cycle. Bounce two or three times and you lose the stored tension and jump from a standstill.
Milestone: you jump out of exactly one counter-movement and know in advance how deep you go.
Now you deliberately release your feet, but only one hand flies to the target hold while the other stays on. The jump is short — it is not about distance, it is about allowing the flight phase to happen.
Milestone: three attempts in a row with no hesitation pause before take-off.
Both hands release, and your eyes stay on the target hold the whole time, not on your feet. Your arms guide the body close to the wall, the drive comes from your legs.
Important: the body stays tense in flight. A loose body arrives crooked.
Milestone: you hit the target hold with both hands at the same time, with no regrab.
The move is not over until you are hanging. Brace core and shoulder girdle before contact, keep the elbows slightly bent as shock absorbers and let the legs swing back to the wall under control after the catch.
Milestone: you hold for three seconds after the catch before climbing on or dropping off under control.
Dynos produce the least predictable falls in the gym. Two things you need to know beforehand.
Direction of the fall: if you miss, you fall backwards away from the wall — and further out than where you started, often with rotation because one hand kept contact longer than the other. So check the mat two to three metres behind you, gaps included, and make sure nobody is standing or climbing in that area.
Landing position: bring the legs under your body immediately, feet first, shoulder-width apart, knees soft, then roll back onto your backside and back. Hands in front of your chest — the reflex to prop up behind you is the most common cause of wrist and elbow fractures.
The numbers are thin but clear: a case report describes more lower-extremity injuries after run-and-jump sequences in modern, dynamic gym problems [2]. And in an emergency-department analysis of 430 boulderers (a Munich trauma centre, a selection of acute accidents), 36.7 percent of injuries involved the ankle and around 61 percent the lower extremity [3].
For the fingers there is a separate rule: finger injuries are the most common injury site in climbing, and the annular pulleys the most commonly injured structure [4]. The catch of a dyno is a sudden load spike on exactly that tissue (experience). So only practise dynos with warm fingers and never at the end of a session, when forearms and nervous system are tired. Big target holds are not a beginner's bonus, they are injury prevention.
And a spot at a dyno steers upper body and head only. Nobody stands in the flight path.
Train the dyno without a wall: stand in front of a high marker and jump as high as you can ten times out of a single counter-movement — with the intention of briefly "standing still" at the highest point and only then reaching.
That trains the deadpoint as a feeling, not as theory. The difference between a dyno that works and one that does not is usually not ten centimetres of jump height but two tenths of a second of timing.
In three stages. First the deadpoint: you press up out of your legs and grab at the exact moment of weightlessness while your feet stay on the wall. Then the small dyno, where the feet release and only one hand flies. Only after that the two-handed jump. Alongside that you train the landing, because early on a dyno ends on the mat more often than on the target hold.
In a deadpoint your feet stay on the wall and only one hand releases — you grab at the highest point of the movement, before you start falling again. In a dyno all points of contact leave the wall, so there is a genuine flight phase. The deadpoint is the preliminary stage and is often the more efficient solution in the gym, because you keep control of your feet.
With warm fingers, big target holds and tension before contact. The catch is a sudden load spike on the pulleys, and pulley injuries are the typical climbing injury. So brace core and shoulder girdle while still in flight, keep the elbows slightly bent as shock absorbers and never practise dynos at the end of a session with tired forearms. Finger pain needs a medical check.
By turning the problem around: it is not the jump that scares you, it is the landing. So first train dropping off from two metres under control until feet first, soft knees and rolling backwards happen automatically. After that the dyno feels like nothing more than a jump. Half-hearted stays dangerous: hesitate and you grip harder and brake exactly the movement that would have carried you.
Bouldering: Breaking the V4 Plateau