title: Dietary, serum and urine ascorbic acid status in male athletes.
abstract: The ascorbic acid (AA)-status of 14 marathon runners, 12 soccer players, 9 wrestlers, 9 basketball players and 16 controls was determined. A 7-day food weighed record was kept to quantify the AA-intake. In addition, the AA-serum concentrations and urinary ascorbate excretion were measured. The AA-intake of all 44 athletes (median, 26th-75th percentile) was 180.7 (188-239) mg/d, the serum concentration 70.6 (65.7-80.2 mumol/l) and the urine ascorbate excretion 1531 (391-2934) mumol/g creatine. No significant differences could be observed between the various sport groups, or between the sport groups and controls with respect to absolute (mg/d) and relative (mg/g body weight) AA-intake, serum and urine concentrations. Only a few of the athletes had AA-intake below the RDA or serum- or urine levels smaller than the decision limit. The absolute AA-intake (n = 44) from the 7-day record (r = 0.49, p < 0.0009) and the AA-intake on the last day (1-day) prior to urine collection (r = 0.90, p < 0.0000) correlate moderately/strongly with the urinary excretion. Between AA-intake (7-day) and serum concentration there is a correlation of r = 0.59, p < 0.0000. The AA-status of highly trained athletes does not differ significantly from the control group in spite of intensive daily training. Thus, AA-supplementation beyond the normal daily intake does not appear necessary.
authors.affiliation: Medizinische Universitätsklinik, Albert Ludwig Universität, Freiburg i. Breisgau.
authors.forename: L
authors.initials: L
authors.lastname: Rokitzki
authors.forename: S
authors.initials: S
authors.lastname: Hinkel
authors.forename: C
authors.initials: C
authors.lastname: Klemp
authors.forename: D
authors.initials: D
authors.lastname: Cufi
authors.forename: J
authors.initials: J
authors.lastname: Keul
mesh_terms: D000328:Adult; D001205:Ascorbic Acid / Q000008:administration & dosage* / Q000097:blood / Q000378:metabolism* / Q000652:urine; D001490:Basketball / Q000502:physiology; D001835:Body Weight; D003401:Creatine / Q000652:urine; D004032:Diet; D015930:Diet Records; D002149:Energy Intake; D006801:Humans; D008297:Male; D018673:Nutrition Policy; D009752:Nutritional Status; D012420:Running / Q000502:physiology; D012916:Soccer / Q000502:physiology; D013177:Sports / Q000502:physiology; D014952:Wrestling / Q000502:physiology
chemical_list: D003401:Creatine; D001205:Ascorbic Acid