Table 2.
Descriptive data on the measured variables
| Two-way ANOVA | ||||||
|---|---|---|---|---|---|---|
| Variables | Sex | YOG | OOG | Age | Sex | Age × sex |
| KE-F, N | M | 307.7 ± 80.0ab | 263.9 ± 88.2b | p < 0.0001 | p < 0.0001 | p = 0.521 |
| W | 241.1 ± 65.9a | 205.4 ± 67.7 | ||||
| KE-F/BM, N/kg | M | 4.937 ± 1.247ac | 4.435 ± 1.392c | p < 0.0001 | p < 0.001 | p = 0.842 |
| W | 4.547 ± 1.233a | 4.088 ± 1.298 | ||||
| STS time, s | M | 12.84 ± 3.15d | 15.37 ± 5.15e | p < 0.0001 | p < 0.0001 | p < 0.0001 |
| W | 13.39 ± 3.71d | 19.60 ± 6.90 | ||||
| STS-PI | M | 63.5 ± 16.2ab | 51.9 ± 17.5b | p < 0.0001 | p < 0.0001 | p = 0.074 |
| W | 48.0 ± 13.6a | 31.7 ± 13.1 | ||||
| STS-VI | M | 1.02 ± 0.23de | 0.87 ± 0.27e | p < 0.0001 | p < 0.0001 | p < 0.01 |
| W | 0.90 ± 0.24d | 0.62 ± 0.23 | ||||
Values are means ± SDs
M men, W women, YOG younger-old group, OOG older-old group, KE-F knee extension force, KE-F/BM KE-F relative to body mass, STS time time taken for a 10-times-repeated STS task, STS-PI power index calculated by using an equation with body height, body mass, and STS time as variables, STS-VI velocity index calculated using an equation with body height and STS time as variables
aSignificantly different from OOG at p < 0.0001 as a result of Scheffe test
bSignificantly different from women at p < 0.0001 as a result of Scheffe test
cSignificantly different from women at p < 0.001 as a result of Scheffe test
dSignificantly different from OOG at p < 0.0001 as a result of unpaired t-test within the same sex
eSignificantly different from women at p < 0.0001 as a result of unpaired t-test within the same age group