Figure 6.

Uniaxial mechanical characterizations. (A) Uniaxial mechanical testing device. (B) A sample was used for testing with a polymer wrap around the muscle part to achieve secure clamping. (C) Sample mounted for failure mechanical testing. (D) Failure stress-strain curves for (i) young female group, (ii) adult female group, (iii) old female group, (iv) young male group, (v) adult male group, and (vi) old male group. Comparisons of (E) failure stresses, (F) failure strains, and (G) maximum tensile moduli among the young female, young male, adult female, adult male, old female, and old male groups. (n = 3 for young male and young female groups, n = 4 for the adult male, adult female, old male, and old female groups, *p < 0.05)