Table 6.

Patellar tendon mechanical properties normalized to a common tendon force

	Placebo		Acetaminophen		Ibuprofen
	Pre	Post	Pre	Post	Pre	Post
Deformation, mm	2.62 ± 0.31	2.29 ± 0.25*	2.14 ± 0.24	2.56 ± 0.32†	2.51 ± 0.21	2.25 ± 0.18‡
Stiffness, N/mm	2,668 ± 362	2,723 ± 379	2,948 ± 315	2,480 ± 406*	1,796 ± 219	1,988 ± 192
Modulus, GPa	0.93 ± 0.11	0.96 ± 0.11	1.11 ± 0.05	0.88 ± 0.07*	0.64 ± 0.08	0.66 ± 0.07
Stress, MPa	25.1 ± 2.8	25.4 ± 2.5	21.6 ± 1.8	20.9 ± 1.8*	14.9 ± 1.9	14.8 ± 1.8
Strain, %	6.0 ± 0.7	5.2 ± 0.5*	4.6 ± 0.4	5.5 ± 0.6†	5.4 ± 0.4	4.9 ± 0.3

Data expressed as means ± SE;

^*P < 0.05, decrease with training.

^†P < 0.05, increase with training.

^‡P = 0.07, decrease with training.