Body composition, dietary intake, and iron status of female collegiate swimmers and divers.
This study determined the effect of training on body composition, dietary intake, and iron status of eumenorrheic female collegiate swimmers (n = 18) and divers (n = 6) preseason and after 16 wk of training. Athletes trained on dryland (resistance, strength, flexibility) 3 d/wk, 1.5 h/d and in-water 6 d/wk, nine, 2-h sessions per week (6400 to 10,000 kJ/d). Body-mass index (kg/m2; P = 0.05), waist and hip circumferences (P < or = 0.0001), whole body fat mass (P = 0.0002), and percentage body fat (P < or = 0.0001) decreased, whereas lean mass increased (P = 0.028). Using dual-energy X-ray absorptiometry, we found no change in regional lean mass, but fat decreased at the waist (P = 0.0002), hip (P = 0.0002), and thigh (P = 0.002). Energy intake (10,061 +/- 3617 kJ/d) did not change, but dietary quality improved with training, as reflected by increased intakes of fiber (P = 0.036), iron (P = 0.015), vitamin C (P = 0.029), vitamin B-6 (P = 0.032), and fruit (P = 0.003). Iron status improved as reflected by slight increases in hemoglobin (P = 0.046) and hematocrit (P = 0.014) and decreases in serum transferrin receptor (P < or = 0.0001). Studies are needed to further evaluate body composition and iron status in relation to dietary intake in female swimmers.
Petersen
Heidi L
HL
Iowa State University, Ames 50011, USA.
Peterson
C Ted
CT
Reddy
Manju B
MB
Hanson
Kathy B
KB
Swain
James H
JH
Sharp
Rick L
RL
Alekel
D Lee
DL
D015502:Absorptiometry, Photon; D000293:Adolescent; D000328:Adult; D001823:Body Composition / Q000502:physiology*; D004242:Diving / Q000502:physiology*; D002149:Energy Intake / Q000502:physiology*; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D007501:Iron / Q000097:blood* / Q000378:metabolism; D008572:Menarche / Q000502:physiology; D015596:Nutrition Assessment; D009752:Nutritional Status; D011990:Receptors, Transferrin; D013550:Swimming / Q000502:physiology*
D006454:Hemoglobins; D011990:Receptors, Transferrin; D007501:Iron