title: From parturition to marathon: a 16-wk study of an elite runner.
abstract: This study monitored a 34-yr-old distance runner for 16 wk immediately postparturition, as she trained for the 1992 United States Olympic Marathon Trials. Weight (WT), percent fat (%FAT), aerobic power (VO2max), and energy intake/expenditure were evaluated 4, 8, 12, and 16 wk post-parturition. WT declined steadily throughout the investigation, while %FAT decreased through the first 12 wk. Minimal changes in VO2max (4 wk; 52.2 ml.kg-1.min-1 to 16 wk: 55.3 ml.kg-1.min-1) occurred; however, there were substantial changes in oxygen uptake at the lactate threshold (VO2-LT) and at the onset of blood lactate accumulation (VO2-OBLA). VO2-LT increased from 35.6 ml.kg-1.min-1 at 4 wk to 43.5 ml.kg-1.min-1 at 8 wk. VO2-OBLA increased from 40.1 ml.kg-1.min-1 at 4 wk to 51.2 ml.kg-1.min-1 at 8 wk. VO2-LT and VO2-OBLA did not change during the final 8 wk of training. Energy intake was consistently below energy expenditure. No physical or medical complications were encountered during training. This subject was able to improve VO2-LT and VO2-OBLA through high-intensity training without compromising her health. The evidence indicates that well-trained female athletes, while under physician care, may participate in rigorous physical activity soon after pregnancy.
authors.affiliation: Department of Physical Education, Indiana State University, Terre Haute 47809.
authors.forename: J A
authors.initials: JA
authors.lastname: Potteiger
authors.forename: J C
authors.initials: JC
authors.lastname: Welch
authors.forename: J C
authors.initials: JC
authors.lastname: Byrne
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology; D000328:Adult; D001823:Body Composition; D015992:Body Mass Index; D001835:Body Weight; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D007773:Lactates / Q000097:blood; D008991:Monitoring, Physiologic; D010101:Oxygen Consumption / Q000502:physiology; D010806:Physical Education and Training; D010807:Physical Endurance; D049590:Postpartum Period; D012420:Running / Q000502:physiology*
chemical_list: D007773:Lactates