Informally separated from WAW, but DBing my best

[AlwaysTrying]

I admit I can't quite picture the "locked legs" sit up position but hey, glad it was fun!

More like locked ankles. When you do sit-ups, your legs want to lift up off the floor. One way to address this is to have someone hold your feet down. Another is to lock your ankles together and do sit-ups simultaneously.

I've been doing the P90-X Ab Ripper routine for months and have little trouble doing any kind of sit-up. Ab Ripper takes less that 15 minutes to do, and if you do it every other day, you will be amazed at the results. Rock-hard ripped abs. It's amazing.