350 weighted step-ups (51 cm) (15/20 kg)

Goal & Intensity
-Build sustainable long-duration stamina on a high box.
-Keep each rep steady and maintain a consistent pace.
-A steady grind that tests legs, lungs, and focus — the work adds up slowly and heavily.
-Switch the lead leg regularly and use your breath to control the rhythm.
RPE: 8-9 heavy and demanding, but manageable with pacing.
Why: Step-ups develop unilateral strength, leg endurance, and overall engine capacity that transfers to running, climbing, and metcon performance. Also because partner Chad 5.12.