Learn the straddle vault: the step from squat to straight legs, a mobility check, the build-up over the box and a landing without knee shock.
The straddle vault is a support vault in which you place your hands on the apparatus and take your straight, widely straddled legs past your arms to the sides. It looks like a squat vault with longer legs but is a task of its own: more hip opening, more body tension, more height above the apparatus.
The honest answer to "Is the straddle harder than the squat?": yes, usually. The squat vault forgives low hips, the straddle does not, because straight legs get caught on the apparatus. Once the squat sits, many adults need a few more sessions until the straddle goes smoothly over a lengthwise box. That is an experience-based estimate, not a study figure.
Helpful to know: jumping power can be trained. In a study of 20 young female gymnasts, a six-week add-on programme of two 45-minute plyometric sessions a week improved run-up velocity, take-off velocity and post-flight time in the handspring vault as well as jump height in a countermovement jump test, while the control group showed no improvement [1] (TRANSFER: different vault, children and adolescents). The direction holds for you too: the vault comes from the run-up and leg power, not from the arms.
Straddle jump from standing: push off, legs to the sides in the air, land closed again. This trains the feeling for the moment when the legs part. Milestone: ten jumps in which the legs stay straight in the air and the landing is soft.
You jump a squat vault over a low box, but let go of the knees and take the legs outside past the arms. At first without straightening — that is the "squat-straddle". Milestone: three jumps in a row in which the feet pass outside the hands.
Same run-up, hands on the box, legs straight to the sides. The spotter stands at the side and secures while you push your hips over your hands. Milestone: five jumps in which the feet do not touch the box.
More length, more run-up, more tension. Now the distance to the mat becomes important. The apparatus aid (bench or springboard) helps keep the take-off height constant [2]. Milestone: three clean straddles per height with landing in a squat.
The landing is the part you notice last and that loads the joints most. In a computer simulation of vault landings by a gymnast, a strategy that minimized ground force lowered it by 8 to 48 percent — but increased most measures of internal loading [4]. Remember: controlled bending, not maximally soft. Milestone: five straddles in which your feet land hip-width apart and you stay standing without a step.
If the straddle does not get high enough, it is almost never the legs but the run-up. Measure your run-up to ten steps and run it the same every time. Whoever jumps with an even, accelerating run-up hits the board repeatedly, and only then can your body build height. That is a practical tip from training, not a study finding.
In the squat vault you pull bent legs through between the arms, in the straddle the straight legs pass outside the arms. The straddle demands more hip mobility and body tension and is therefore harder.
Height comes from run-up, take-off and hips, not from the legs. Run up evenly, take off strongly with both feet and push your hips over your hands. Extra jump training can help, as it improved vaulting performance in a study of young female gymnasts [1].
Once the squat sits, many adults need a few sessions for the straddle over the crosswise box and a few weeks for the straddle over a buck or lengthwise box. It depends on run-up and hip mobility, not courage.
The risk lies in the set-up: apparatus too high, mats too short, no spotting. With a low box, a long landing mat and an experienced spotter it is well manageable [3]. With pain in wrist, knee or back you pause.
Back Hip Circle on the Bar: Keeping Your Hips on the Bar