Instructions:
- 1Lie flat on your back with your arms extended by your sides
- 2Bring one knee and the opposite elbow together with a crunch, flexing the abs
- 3Lower back to the starting position
- 4Repeat with the other knee and elbow
- 5Continue alternating sides for the duration of your set
Tips:
- Keep your lower back pressed to the floor to engage your abs
- Exhale as you crunch, and inhale as you lower back down
- Try to touch your elbow to your knee, but don't strain your neck
- Performing the exercise in a slow, controlled motion will be more beneficial than rushing through it