Choose your tier — from dead bugs and crunches up to the full GHD sit-up. Move through the full range for your tier under control, touching the stated points at top and bottom. Repeat for max reps.

Declare your tier before starting. Full range every rep to your tier's standard. Most reps at your tier wins; a higher tier always outranks a lower one. D4 (GHD Situp) is scored by added weight instead of reps.

Difficulty tier + repetitions