English to Italian Medical Medical (general) assessment scales

Describing patterns of going up or down stairs.

The usual pattern is alternating feet (a passo alternato) and then there is this step-to pattern and I was thinking about "salire/scendere le scale riunendo i piedi".

Explanation is: using one foot to make the first step up/down the stairs and bringing the other foot on the same step. Therefore both feet are on the same step before going on.

Thank you for your help!