On a 12-minute clock:
1 minute of GHD sit-ups
1 minute of bar muscle-ups
2 minutes of GHD sit-ups
2 minutes of bar muscle-ups
3 minutes of GHD sit-ups
3 minutes of bar muscle-ups
Post reps for each exercise completed to comments.
Scaling:
You have a total of 6 minutes to perform each movement, and the volume will demand rest breaks—especially in intervals 4-6. Select modifications that force you to work relatively hard for each rep of the pulling movement, and modify the core work so you do not have to take long rest breaks. The GHD sit-up is potent: Avoid large increases in volume over previous workouts or sub out for sit-ups.
Intermediate Option
On a 12-minute clock:
1 minute of GHD sit-ups to parallel
1 minute of chest-to-bar pull-ups
2 minutes of GHD sit-ups to parallel
2 minutes of chest-to-bar pull-ups
3 minutes of GHD sit-ups to parallel
3 minutes of chest-to-bar pull-ups
Beginner Option
On a 12-minute clock:
1 minute of AbMat sit-ups
1 minute of assisted chest-to-bar pull-ups
2 minutes of AbMat sit-ups
2 minutes of assisted chest-to-bar pull-ups
3 minutes of AbMat sit-ups
3 minutes of assisted chest-to-bar pull-ups