Double kong in parkour: two kong pushes over a long obstacle. Built up over low boxes with a contact check and an honest look at the evidence.
The double kong is a kong vault with two pushes: you cross a long obstacle by pushing off twice with your hands and flying off again between the contacts. In the FIG rules it has a base value of 1.8, the simple kong vault 0.7 [1] — more than two and a half times. The number is a scoring value, not a learning difficulty, but it shows: the double kong is not two kongs, it is a move of its own.
The honest answer: I found no study on the double kong. What is documented is the kong vault as an assessment item and the landing. In the course test, the monkey vault is checked for take-off, flat palms, legs tucked tight without contact and landing on the balls of the feet with at least 90° of knee flexion [2]. The landing matters for the double kong too: traceurs roughly doubled landing duration compared with untrained people and passed about half of the energy through the knee [3].
What do data show on jumping power? In a study of 36 male traceurs (mean 9.6 years of experience), experience correlated positively with the standing long jump (ρ = 0.49) and the triple horizontal plyometric jump (ρ = 0.45) [4]. Horizontal power grows with practice. For the double kong that means: do not expect weeks but months to years — an experience value, not a study figure.
And the risk? The main causes of parkour injuries in US emergency departments were landings and striking objects [5]. With a long obstacle there is also the fact that you have hand contact twice: if the second one misses, the impact comes.
An honest sentence on the pro level: pro here does not mean the move needs more courage but more preparation. Anyone training the double kong seriously has done hundreds of clean kongs beforehand. And they know the limits of their wrists, shoulders and ankles.
Split the movement into parts: first push, flight, second push, landing. Practise each part separately, then join them. This is a practice standard.
Kong over a long bench, landing with the feet before the end. You practise the length without a second push.
Milestone: 10 clean kongs, landing quiet.
Two low boxes half a body length apart. One kong onto the first box, a short hold in the squat — and from there a second kong onto the second box.
Milestone: 8 out of 10 tries without leg contact.
Shorten the hold on the first box until both kongs flow into one another: hands on box one, flight, hands on box two. The timing between the pushes is decisive.
Milestone: 8 out of 10 tries with two clean hand contacts.
One continuous, low obstacle, two pushes. Head up, eyes to the end.
Milestone: 8 out of 10 tries clean.
Lengthen the obstacle in steps of about half a body length. Height stays low.
Milestone: 10 clean passes per stage.
Count aloud "one–two" to the hand contacts. This is a practice trick without study evidence, but the rhythm stops the second push from coming too late.
Second trick: mark the hand positions with chalk. That shows whether both pushes land on the same spot or whether your rhythm drifts. This is a practice trick without study evidence.
A kong vault with two pushes over a long obstacle, with the body flying off between them. In the FIG rules it has a base value of 1.8 [1].
A kong has one push, a double kong has two with a flight phase in between. It is a move of its own, not a stretched kong.
There are no data on the move. The risk lies in landing and striking objects [5]. Start low and with a spotter.
Expect months, often longer. That is an experience value, not a study figure.
Long enough to push off twice without rushing — in practice often one and a half to two metres — and low enough that you trust yourself to abort at any time. This is a practice standard without study evidence.
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