Weights locked overhead, march on, your core does overtime.
Keep your arms by your ears and ribs down. Don't let your lower back arch to hold the load up.
Locking dumbbells overhead turns a simple march into a full-body stability test. Your core works overtime resisting the arch and sway the overhead load creates, the shoulders hold an unbroken isometric to keep the weights stacked, and the quads and glutes drive each knee lift. It slots in as a loaded carry variation that builds the kind of bracing you feel in every overhead press afterwards.
Mostly your core's ability to hold position under load. Every step tries to tip you sideways and pull your lower back into an arch, and your trunk has to say no. The shoulders get a long isometric hold and the legs handle the marching.
Lighter than your ego wants. The set is over the moment your ribs flare or the weights drift forward, so pick a load you can hold perfectly stacked for the full time. Crisp position beats heavy wobbling every time.
It is a timed movement, so think in seconds rather than steps. Somewhere around 20 to 40 seconds of clean marching is a strong set, and the honest end is when your lower back starts arching to hold the weights up.
