Table 1. The NR, DS, and DS/NR of each set in leg press exercise, and the sum of three sets (total) for different rest intervals, in trained older women (n = 17). Values are mean ± standard deviations.
1st set 2nd set 3rd set Total
NR RI-1 14.2 (0.8) 8.0 (1.7) * 7.2 (1.8) * 29.3 (3.6)
RI-3 14.7 (0.8) 12.4 (1.2) * 11.0 (2.2) *†  38.1 (3.9)
DS (s) RI-1 36.7 (5.7) 22.6 (4.6) * 20.3 (5.6) * 79.6 (11.8)
RI-3 40.3 (5.9) 32.1 (6.5) * 29.7 (9.4) * 102.2 (21.0)
DS/NR (s·reps-1) RI-1 2.6 (0.4) 2.9 (0.6) * 2.9 (0.6) * 8.3 (1.4)
RI-3 2.7 (0.4) 2.6 (0.3) 2.7 (0.4) 8.0 (0.8)
‡ Statistically significant difference when compared to RI-3 (p < 0.05).
†  Statistically significant difference when compared to the second set (p < 0.05);
*S tatistically significant difference when compared to the first set (p < 0.05);
NR = number of repetitions; DS = duration of set; DS/NR = average time of repetitions; RI-1 = one-minute rest interval; RI-3 = three-minute rest interval;