Abstract
We conducted a double-blind, placebo-controlled, randomized trial to determine whether 1 year of supplemental calcium intake would augment hip [greater trochanter, GT, femoral neck (FN), total hip (TH)], spine (LS), and femoral mid-shaft (Fmr) BMD in female distance runners. Twenty-three women (age: 23.7 ± 4.7 yrs, height: 165.6 ± 6.3 cm, weight: 55.7 ± 6. 1 kg) were randomly assigned to receive either 1000 mg/d of supplemental calcium (N = 13) or placebo tablets (N = 10) for 1 year. BMD was determined by DXA (Hologic 1000-W) and tablet compliance by self-report logs. Compliance averaged 79% and 71% for supplement and placebo groups, respectively. Calcium supplementation did not affect hip or spine BMD, but did prevent loss at the femoral mid-shaft (GT: -0.5% vs. 0.2%, FN: 0.9% vs. 1.1%, TH: -0.3% vs. 0.2%, LS: 0.3% vs. 1.2%, Fmr: 0.1% vs. -1.8%, for calcium vs. placebo, respectively). We conclude that the addition of 800 mg/d of supplemental calcium to the diet of young adult female distance runners with habitual calcium intakes of ∼1000 mg/d, prevents cortical but not trabecular bone loss.
Original language | English (US) |
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Pages (from-to) | 7-17 |
Number of pages | 11 |
Journal | International Journal of Sport Nutrition and Exercise Metabolism |
Volume | 14 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2004 |
Keywords
- Athletes
- Bone
- Nutrition
- Osteoporosis
- Premenopausal
- Women
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Orthopedics and Sports Medicine
- Nutrition and Dietetics