I was going through some old papers today and I ran across this advanced giant set for abs. I printed it out from some website back in the 90’s (not sure if the before-mentioned website even exists anymore).
Here it is:
Hanging leg raises–15 reps, 2 second intervals
Hanging bent-knee raises–5 reps, 1 second intervals
Lying 6″ leg raises–30 reps, 1 second intervals
Rest for 15 seconds, then
Lying 6″ leg raises–20 reps, 1 second intervals
Reverse crunches–20 reps, 1 second intervals
1/4 twisting sit-ups–35 reps, 2 second intervals
Rest for 10 seconds, then
1/4 sit-ups–35 reps, 2 second intervals
Crunches–20 reps, 0.5 second intervals
Unless specified, no rest between sets. Make sure to breath out during the contracting phase of the motion.
What I like about this is you progress from difficult to easier movements as your abs get fatigued.
