Sit on a decline bench or lever decline sit‑up machine with your feet secured under the foot pads. Cross your arms over your chest or place your hands lightly behind your head (without pulling on your neck). Brace your core and slowly lean back toward the floor, keeping your lower back neutral. Pause briefly at the bottom, then contract your abs to pull your torso back up to the starting seated position with control.
Log your lever decline sit up sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.