TABLE 1.
Summary of dynamic properties
| N | Complex stiffness (kN m−2) | −Ev (kN m−2) | fEv (Hz) | Ee (kN m−2) | Pmax (W m−3) | fmax (Hz) | r3 (s−1) | |
|---|---|---|---|---|---|---|---|---|
| IFI | 11 | 366 ± 28 | 159 ± 9 | 112 ± 6 | 332 ± 28 | 96 ± 7 | 131 ± 5 | 1133 ± 54 |
| IFI-9b, 1 | 12 | 258 ± 18* | 115 ± 10* | 83 ± 6* | 236 ± 15* | 54 ± 7* | 104 ± 6* | NA |
| IFI-9b, 3 | 12 | 268 ± 25* | 133 ± 19 | 85 ± 3* | 255 ± 24* | 49 ± 6* | 117 ± 4* | 910 ± 39* |
| EMB | 12 | 65 ± 5 | 28 ± 3 | 20 ± 0.4 | 59 ± 4 | 2.4 ± 0.2 | 20 ± 0.2 | 98 ± 4 |
| EMB-9a, 18 | 11 | 114 ± 10† | 68 ± 5† | 24 ± 0.9† | 94 ± 9† | 7.4 ± 0.4† | 26 ± 0.7† | 137 ± 4† |
| EMB-9a, 34 | 7 | 79 ± 13 | 46 ± 6† | 26 ± 0.7† | 66 ± 11 | 5.1 ± 0.9† | 28 ±1.0 † | 156 ± 5† |
Complex stiffness and elastic modulus (Ee) values for IFI and IFI-9b were measured at the frequency (fmax) at which IFI generated maximum power (Pmax). Ee and complex stiffness values for EMB and EMB-9a were measured at the specific fmax of each fiber type. fEv is the average frequency at which the viscous modulus amplitude was lowest. −Ev is the average minimum amplitude for the viscous modulus. r3 is the rate constant for phase 3 of force recovery after a quick lengthening step (see Materials and Methods). EMB-9a, 34 is a second EMB-9a line created by an independent transformation event. IFI-9b, 3 is a second IFI-9b line created by an independent transformation event. All values are mean ± SE.
Statistically different from IFI (t-test, p < 0.05).
Statistically different from EMB (t-test, p < 0.05).