Best Crunch Abdominal Exercise - Get six pack abs This may be the best version of abdominal floor crunches. As with all exercises, do them right and you will get the full benefit. Do them wrong and you are wasting your time and could be worsening your posture, muscle balance, etc. You basically take half of the bicycle maneuver and perform one side at a time. To perform correctly make sure your bottom leg is off of the ground and your leg which is in the air is at a 90 degree angle. Try this exercise as your first abdominal exercise if you are a beginner. If you are advanced, try this at the end of your abdominal routine. Remember in order to see your abs you must burn more calories than you consume. perform a full body work out routine. Basically, If you don't do push-ups, pull-ups, squats and lat pulls, you are wasting your time doing any ab exercises and you will never have six pack abs. In order to do see your abdominals and especially in order to get 6pack abs you must eat a clean, healthy diet, and do your cardio. Personal Trainer Mike Behnken, MS, CSCS