Table 3. Model information for the association between groups of different ages and temporal and physical variables according to quality of opposition. Variable Chi-square of likelihood ratio tests Balanced (n = 50) Moderate balanced (n = 26) Unbalanced (n = 18) χ2 χ2 χ2 Temporal variables Duration of set 16.85*** 3.81 3.22 Total rest time 20.07*** 0.16 3.13 Total work time 2.11 3.03 2.87 Duration of rallies 3.86 3.67 0.56 Rest time between rallies 21.80*** 4.89 8.57* Number of rallies 6.38* 1.91 8.02* Adjusted model 40.90*** 9.64 11.15* Duration of set 2.50 Total rest time 1.99 Rest time between rallies 12.17** 3.13 Number of rallies 5.72 2.58 Physical variables Number of jumps done by defender 13.32*** 5.95* 1.67 Number of jumps done by blocker 0.10 7.54* 4.48 Total number of jumps 2.15 3.91 0.22 Number of hits done by defender 5.04 1.94 1.55 Number of hits done by blocker 1.76 1.54 0.15 Total number of hits 1.07 2.80 1.84 Adjusted model 13.32*** 14.30* Number of jumps done by defender 13.32*** 6.76* Number of jumps done by blocker 8.35* * p < 0.05 ** p < 0.01 *** p < 0.001.