Table 2. Pearson correlation coefficients between changes (∆ scores) in bone mineral values over the 3-year period with baseline body composition and jumping performance variables.
Variable
Rhythmic gymnasts (n = 25)
Untrained controls (n = 25)
∆WB BMD (g·cm-2)
∆FN BMD (g·cm-2)
∆WB BMD (g·cm-2)
∆FN BMD (g·cm-2)
Age (yrs)
.28
-.04
.32
.16
Bone age (yrs)
.19
.06
.62 *
.35
BMI (kg/m2)
.13
.17
.58 *
.30
Fat mass (kg)
.07
.11
.73 *
.47 *
Fat free mass (kg)
.48 *
.45 *
.61 *
.36
CMJ (cm)
.11
.07
.22
.27
RJ15s (cm)
.29
..48*
.33
.21
* Statistically significant; p < 0.05.
WB, whole body; BMD, bone mineral density; FN, femoral neck; CMJ, countermovement jump; RJ15s, the rebound jumps for 15 seconds.