Comparison of the influence of volume-oriented training and high-intensity interval training on serum homocysteine and its cofactors in young, healthy swimmers. - Herrmann,M.; Wilkinson,J.; Schorr,H.; Obeid,R.; Georg,T.; Urhausen,A.; Scharhag,J.; Kindermann,W.; Herrmann,W. (Clin Chem Lab Med, 2003)