TABLE 2.
Peak strain rate and strain indices for a region of interest in GM averaged across young and senior subjects.
Group | GM |
||||
30% MVC | 40% MVC | 60% MVC | |||
SR fiber† | [ms–1] | Young | −596 ± 290 | −777 ± 282 | −940 ± 316 |
Senior | −651 ± 375 | −709 ± 327 | −922 ± 421 | ||
SR out–plane | [ms–1] | Young | −96 ± 174 | −31 ± 137 | −76 ± 91 |
Senior | −71 ± 171 | −49 ± 112 | −47 ± 194 | ||
SR in–plane† | [ms–1] | Young | 583 ± 339 | 744 ± 270 | 961 ± 336 |
Senior | 577 ± 302 | 726 ± 415 | 945 ± 538 | ||
SR max† | [ms–1] | Young | 992 ± 503 | 1,270 ± 315 | 1,587 ± 473 |
Senior | 1,025 ± 548 | 1,197 ± 579 | 1,552 ± 706 | ||
L fiber† | Young | −0.254 ± 0.129 | −0.371 ± 0.176 | −0.420 ± 0.120 | |
Senior | −0.235 ± 0.127 | −0.265 ± 0.103 | −0.354 ± 0.179 | ||
L out–plane | Young | −0.003 ± 0.085 | 0.033 ± 0.128 | −0.001 ± 0.142 | |
Senior | −0.014 ± 0.076 | 0.002 ± 0.058 | −0.004 ± 0.109 | ||
L in–plane*† | Young | 0.422 ± 0.116 | 0.569 ± 0.161 | 0.697 ± 0.204 | |
Senior | 0.378 ± 0.197 | 0.459 ± 0.215 | 0.543 ± 0.217 | ||
L max*† | Young | 0.552 ± 0.175 | 0.765 ± 0.243 | 0.899 ± 0.221 | |
Senior | 0.509 ± 0.266 | 0.600 ± 0.256 | 0.715 ± 0.297 | ||
L vol | Young | 0.169 ± 0.212 | 0.305 ± 0.155 | 0.350 ± 0.249 | |
Senior | 0.153 ± 0.183 | 0.203 ± 0.160 | 0.177 ± 0.253 |
*L in–plane, L max p < 0.05 between age groups. †SR fiber, SR in–plane, SR max, L fiber, L in–plane, L max p < 0.05 between 30 and 60% MVC.