 The study will be a randomized double-blind, placebo controlled trial with a 3x2 design. Power calculations were based on the pilot study performed by the investigators in Shanghai in 2013 and a study by Brownlie et al. Sample size was calculated to require 24 women per group, which was expanded to 29 subjects per group to allow for sample dropout. Subjects will be randomized to receive either 50mg of ferrous sulfate capsule twice a day 20mg elemental ironday, 6 mg of BaZhen KeLi, or identical placebo capsules for 8 weeks. Half of each supplement group will also be randomly assigned to receive 8 weeks of aerobic exercise training 5 daysweek, 25 minutesday or no training. 