I have to post this because early this morning I read a magazine article that drove me absolutely bananas.  Lactic acid is not the cause of DOMS (Delayed Onset Muscle Soreness)  Lactic acid is the buildup during exercise.  You know, that intolerable burn you get that makes you want to throw the weights across the room.  (Tolerating this pain is the key to training).  Once that feeling passes so has the lactic acid.  If that were not the case you would experience this pain from the minute you did your first full set, to the minute you left the gym.  Not the day after, and especially not the 2nd day, (Which is worse than day one).  DOMS has not been explained in the medical profession.  It’s all theory and the #1 theory is trauma caused by the tearing down (TRAUMA) and rebuilding (HEALING) of muscle tissue.  There are a few supplements that will help with DOMS,  L-glutamine, BCAA’s (Branched Chain Amino Acids), a healthy diet, rest, hot/cold, and H2O.  These supplements are natural and not only do they help in repairing the muscle, they also aid in protein synthesis.  The quicker you recover the quicker you can train. 

Oh, by the way, if you want visible abs you have to reduce bodyfat.  Spot training is ineffective.  Do 1000 sit-ups, crunches, reverse crunches, v-ups, etc, then eat a 500 calorie surplus diet each day, then tell me differently.