Alternating Rotation Crunch on Bolster
If you are looking to target obliques and abdominals this exercise delivers results. You can roll up a towel or use a yoga bolster to support your low back. If you travel this is a great exercise that can be performed in your hotel room. Make sure you do not place pressure on your neck, just cradle your head with your hands. Focus on using your stomach muscles to perform the work and bring your torso up as high as possible.