Fig. 2.

Patellar Tendon Modulus and Stress Relaxation After Decorin and Biglycan Knockdown. During mechanical testing, the tendon midsubstance (a, b) and insertion (c, d) modulus was measured for 300 d and 570 d tendons, respectively (n = 10–14/genotype/age). A stress-relaxation test was applied to the tendons at 3% (e, f), 4% (g, h), and 5% (i, j) strain to determine the viscoelastic response of the tendons at 300 d and 570 d (mean ± SD, n = 13–16). Data shown as mean ± standard deviation. Bars indicate significance of p < 0.05/12 between genotypes at 300 d or 570 d. * indicates significance of p < 0.05/12 between 300 d and 570 d within a genotype. Comparisons were made with two-way ANOVAs based on genotype and age with Bonferroni post-hoc comparisons.