I'm looking to build stronger abdominal muscles and the tried and true, crunches, situps, done with weight just aren't making my abs stronger. Are there any suggestions that can help me build a stronger core and stonger abs. I'm not trying to have a six pack yet so diet suggestions aren't really what I'm looking for. Basically I'm just looking for two to three exercises that will really strengthen my abdominals and my back. I'm sure squats and deadlifts are fudamentals for the core but are there any other exercises that will target my core better? Thanks for any ideas or suggestions.