TABLE 2.
Intercorrelation matrix and factor analysis results.
| CMJ | SBJ | MVJ_D | MVJ_ND | LU_ND | LU_D | RSI | F | |
|---|---|---|---|---|---|---|---|---|
| r (95%CI) | r (95%CI) | r (95%CI) | r (95%CI) | r (95%CI) | r (95%CI) | r (95%CI) | ||
| CMJ (cm) | - | 0.73 | ||||||
| SBJ (cm) | 0.62 (0.49-0.72)† |
- | 0.68 | |||||
| MVJ_ND (cm) | 0.49 (0.33-0.62)† |
0.44 (0.27-0.58)† |
- | 0.86 | ||||
| MVJ_D (cm) | 0.57 (0.43-0.68)† |
0.43 (0.26-0.57)† |
0.74 (0.64-0.81)† |
- | 0.88 | |||
| LU_ND (cm) | 0.56 (0.42-0.67)† |
0.52 (0.36-0.65)† |
0.88 (0.83-0.92)† |
0.88 (0.83-0.92)† |
- | 0.89 | ||
| LU_D (cm) | 0.51 (0.35-0.64)† |
0.52 (0.36-0.65)† |
0.71 (0.60-0.79)† |
0.75 (0.65-0.82)† |
0.74 (0.64-0.81)† |
- | 0.89 | |
| RSI (index) | 0.47 (0.31-0.59)† |
0.31 (0.13-0.47)† |
0.40 (0.23-0.55)† |
0.56 (0.42-0.67)† |
0.54 (0.38-0.67)† |
0.45 (0.29-0.57)† |
- | |
| RRSA (index) | 0.37 (0.20-0.52)† |
0.31 (0.13-0.47)† |
0.40 (0.23-0.55)† |
0.48 (0.32-0.61)† |
0.47 (0.31-0.59)† |
0.45 (0.29-0.57)† |
0.56 (0.42-0.67)† |
|
| ExplVar | 4.16 | |||||||
| PrpTotl | 0.69 |
CMJ – countermovement jump; SBJ – standing broad jump; MVJ_D - maximal running vertical jump with the take-off from dominant leg; MVJ_ND - maximal running jump with the take-off from non-dominant leg, LU_D - lay-up shot jump with the take-off from dominant leg, LU_ND - lay-up shot jump with the take-off from non-dominant leg, RSI - reactive-strength-index, RRSA - repeated reactive strength ability, † denotes significant Pearson’s product moment correlation coefficients at p < 0.05, F – correlations of the variables with principal component of the factor analysis, ExplVar – explained variance, PrpTotl – proportion of the total variance explained, note that RSI and RRSA (i.e. indexes) were not included in factor analysis calculation.