Table 5.
Learning effects for PF and RFD variables across three testing sessions by age category.
Age
Variable
Day 1 vs Day 2
(d)
Day 1 vs Day 3
(d)
Day 2 vs Day 3
(d)
p-value
(Main Effect)
Trend
U12
PF
0.953
0.403
-0.487
0.011
Day 1 < Day 2
RFD50
0.359
0.655
0.218
0.119
-
RFD100
0.276
0.273
0.022
0.590
-
RFD150
0.285
0.027
-0.168
0.673
-
RFD200
0.827
0.520
-0.220
0.062
-
RFD250
1.010
0.719
-0.228
0.011
Day 1 < Day 2
U15
PF
0.748
0.637
0.158
< 0.001
Day 1 < Day 2
RFD50
0.338
0.595
0.346
0.032
-
RFD100
0.421
0.467
0.131
0.065
-
RFD150
0.492
0.671
0.343
0.002
Day 1 < Day 2
RFD200
0.570
0.989
0.486
< 0.001
Day 1 < Day 2
RFD250
0.672
0.914
0.322
< 0.001
Day 1 < Day 2
U18
PF
0.051
0.094
0.012
0.962
-
RFD50
-0.183
-0.130
0.014
1.000
-
RFD100
-0.019
-0.014
0.007
0.683
-
RFD150
-0.119
-0.104
0.060
0.869
-
RFD200
-0.043
0.077
0.105
0.925
-
RFD250
0.183
0.118
-0.118
0.733
-
PF = peak force; RFD = rate of force development; d = Cohen's d effect size.