AbMat Sit-Ups (Diamond Sit-Up) Build Strength and Endurance With

Lie on your back, and open your legs into a diamond shape (aka butterfly legs) with the soles of your feet pressed together and knees out wide. Extend your

7 Medicine Ball Exercises For Six-Pack Abs - Oxygen Mag

How to build core strength when doing core exercise is hard because of back pain - Quora

Sit-Ups Benefits: Exercises, Variations, and More

Diamond Sit Ups

225 lbs floor press x 22 reps @187 lbs #floorpress #benchpress #maxre

Bodyweight Resource

44 Crossfit Workouts Demonstrated, Your Guide to Crossfit Workouts –

Diamond Sit Ups

2-Week Home CrossFit Workout Plan

Benchmark WODs: A Collection of CrossFit Workouts, PDF, Kettlebell

Daily Feed - Archon Bracket