The seated ab crunch provides a safer alternative for targeting the abs and low back and it can be conveniently performed at home, office or anywhere a chair, bench or other study surface is available ...

Place your feet up on a bench or sofa. Start as you did for the abdominal crunch, lying on the floor with your knees bent and arms across your chest with hands on opposite shoulders. Again look at ...

Ethier suggests doing the reverse crunch on a bench, but you can also do it on the floor if you have one of the best yoga mats. Watch Jeremy Ethier’s six-pack abs video Ethier’s video is ...