The Relationship between Cortisol and Bone Mineral Density in Competitive Male Cyclists
Table 3
Correlations for BMD and cyclist characteristics ().
Variable
1
2
3
4
5
6
7
8
9
10
11
12
13
Predictor variable
(1) Age
—
(2) BMI
0.00
—
(3) Calcium intake
0.07
0.07
—
(4) Weight training
0.01
0.31
0.62†
—
(5) Years of cycling
0.67†
−0.05
0.00
−0.12
—
(6) Run training
−0.14
0.42*
−0.16
0.20
−0.23
—
(7) Races per year
−0.11
−0.26
0.28
−0.19
0.24
−0.42*
—
(8) Prerace cortisola
−0.05
0.31
0.15
0.25
0.08
0.29
−0.10
—
(9) Postrace cortisolb
−0.02
−0.24
0.00
−0.23
−0.11
0.19
−0.02
−0.08
—
(10) Prerace nervousness
−0.16
−0.27
0.06
−0.03
−0.05
−0.21
0.05
−0.19
−0.08
—
Dependent variables
(11) Lumbar spine
0.02
−0.11
0.40*
0.61†
−0.22
−0.44
−0.22
−0.04
0.03
0.03
—
(12) Total hip
−0.24
0.16
0.21
0.66†
−0.28
0.13
−0.28
0.16
−0.02
−0.03
0.76†
—
(13) Femoral neck
−0.27
0.08
0.38*
0.75†
−0.37*
0.12
−0.28
0.11
−0.08
−0.11
0.86†
0.91†
—
(14) Femoral trochanter
−0.01
0.05
0.29
0.64†
−0.17
0.09
−0.24
0.14
−0.01
0.10
0.82†
0.90†
0.86†
Note. n = 29, n = 22; denotes that correlation is significant at the 0.01 level; denotes that correlation is significant at the 0.05 level. BMI represents body mass index. Calcium intake was estimated as mg/day. Weight training and run training were measured in min/wk. Salivary cortisol was measured in nmol/L. BMD was measured as g/cm2.