Diagonal squat: benefits and risks for the lower back

Squat with an adapter: isolate the quads or give away your lower back?

The latest trend in gyms is not an expensive machine, but an adapter that changes the axis of the classic squat. The movement becomes diagonal and forces you to lean your back, supposedly reducing the load on the spine. The promise: more quads, less disc strain. The reality, as is almost always the case in fitness, is more nuanced.

How effort is distributed depending on the lean

Those who have tried the variation point out that, when trying to keep the back straight, the quads take on far more of the load: the next day's soreness confirms it. But that same lean shifts tension to the lower back and the knees. The debate is reminiscent of the hack squat: in an upright position, the quads work harder; with the torso leaning, the glutes and lower back come into play. With the adapter, the weight on the shoulders adds a factor the hack squat doesn't have.

Lower-risk alternatives with better carryover

Against the machine, advocates recommend the Bulgarian split squat with a three-second pause at the bottom as a way to "destroy" the quads without compromising the spine. Or the weighted backpack squat, which removes the load on the shoulders and wears down the spinal discs less. Functionality, some analyses argue, should matter more than muscle isolation: unilateral exercises with natural movement pay off better in the long run.

In the short term, the relief for the spine may seem real. The bill arrives when the knees or the lower back start to complain. In strength training, as in investing, there is no return without risk: you just have to decide who pays it.