I recently read a report in a magazine about a couple of interesting studies regarding muscle soreness from training and/or from races.
Researchers found that those who took a high does of vitamin C for two weeks, then performed exercise, then continued to take the high dose of vitamin C for four more days, experienced less muscle soreness than a group taking a placebo. The high dose of vitamin C was three grams per day.
Another study showed that cherry juice had a similar effect. Drinking cherry juice (which is high in antioxidants) two times per day for three days before exercise and for four days after the exercise test experienced less muscle soreness than the group that did not.