The Relationship between Cortisol and Bone Mineral Density in Competitive Male Cyclists
Table 1
Means, standard deviations, and 95% confidence intervals for cyclist characteristics.
Variable
M
SD
95% CI
Age
42.1
9.0
[38.8, 45.5]
BMI
24.8
1.5
[24.3, 25.4]
Calcium intake
1313.9
547.0
[1109.7, 1518.2]
Years of cycling experience
11.7
9.7
[8.1, 15.4]
Races per season
21.5
11.3
[17.3, 26.7]
Bicycle training
12.3
3.9
[10.8, 13.8]
Weight training
28.7
46.7
[11.2, 46.1]
Run training
13.2
40.2
[−1.7, 28.3]
Race completion time
60.8
3.9
[59.2, 62.4]
Prerace cortisola
9.4
4.1
[7.8, 11.0]
Postrace cortisolb
20.8
14.5
[14.3, 27.2]
Prerace nervous
2.6
0.7
[2.3, 2.9]
Note. n = 29, n = 22; BMI represents body mass index. Calcium intake was estimated as mg/day. Bicycle training was measured in hr/wk. Weight training and run training were measured in min/wk. Race completion time was measured in min. Salivary cortisol was measured in nmol/L.
