Single versus Split Dose of Iron Optimizes Hemoglobin Mass Gains at 2106 m Altitude

ABSTRACTPurposeTo determine if a single versus a split equivalent daily dose of elemental iron was superior for hemoglobin mass (Hbmass) gains at altitude while minimizing gastrointestinal (GI) discomfort.MethodsTwenty-four elite runners attended a 3.1 ± 0.3 wk training camp (Flagstaff, AZ; 2106 m).