Journal of Sports Science and Medicine

Table 5. Mechanical properties in femora and tibiae. Values are means (±SEM).

	1-Week		2-Week		4-Week		8-Week
	L1	C1	L2	C2	L4	C4	L8	C8
Femur	n=12	n=12	n=12	n=11	n=12	n=12	n=12	n=12
YL (N)	82.4 (1.2)	86.2 (1.8)	95.2 (4.2)	87.1 (5.6)	101.5 (2.7)	101.4 (6.9)	117.8 (4.4)	99.1 (3.5)**
FL (N)	67.1 (3.4)	76.8 (3.2)*	86.6 (1.9)	86.8 (4.4)	115.4 (3.0)	119.3 (3.5)	126.7 (4.1)	111.9 (3.2)**
YE (mJ)	39.8 (1.6)	41.0 (4.6)	40.7 (2.8)	35.9 (2.8)	25.5 (2.5)	28.4 (3.2)	36.4 (2.4)	27.7 (2.7)*
FE (mJ)	79.6 (4.4)	75.3 (4.1)	75.2 (7.7)	66.7 (6.7)	50.4 (3.3)	54.8 (3.1)	48.5 (3.0)	42.1 (2.6)
PYE (mJ)	39.8 (4.6)	34.3 (4.2)	34.5 (6.2)	30.8 (6.3)	24.8 (3.7)	25.8 (3.3)	12.1 (2.0)	14.4 (2.9)
Stiffness (N/mm)	107.1 (4.2)	104.2 (5.2)	154.9 (12.1)	141.3 (15.7)	315.2 (18.7)	265.0 (22.6)	267.0 (18.7)	271.5 (21.5)
YS (MPa)	118.9 (4.5)	117.3 (5.4)	138.2 (7.7)	126.0 (9.3)	120.3 (5.3)	130.1 (9.0)	131.2 (5.7)	116.0 (5.5)
YT (mJ/mm³)	3.27 (.22)	3.38 (.32)	3.26 (.25)	2.90 (.24)	1.74 (.15)	2.03 (.22)	2.32 (.15)	1.87 (.21)
EM (Gpa)	2.73 (.16)	2.51 (.10)	4.10 (.37)	3.74 (.47)	6.41 (.50)	6.34 (.49)	5.31 (.58)	5.58 (.46)
Tibia	n=12	n=12	n=12	n=12	n=12	n=12	n=12	n=12
YL (N)	56.7 (2.2)	60.5 (3.0)	68.6 (3.4)	70.3 (2.4)	81.2 (2.5)	79.4 (2.5)	90.0 (2.53)	85.1 (3.7)
FL (N)	67.6 (3.4)	66.6 (2.6)	70.4 (4.8)	71.8 (3.4)	86.4 (3.3)	82.2 (3.6)	98.6 (2.49)	88.9 (2.4)**
YE (mJ)	18.3 (1.1)	21.4 (1.8)	27.0 (2.3)	27.2 (1.8)	26.1 (2.2)	25.6 (1.5)	28.4 (1.98)	30.2 (3.4)
FE (mJ)	53.9 (5.7)	58.2 (4.1)	60.6 (5.9)	76.3 (9.9)	75.2 (12.1)	68.3 (5.5)	65.5 (4.39)	61.1 (7.1)
PYE (mJ)	36.1 (6.8)	36.8 (3.2)	35.8 (6.9)	49.9 (11.5)	49.1 (11.1)	42.8 (4.6)	37.1 (3.83)	31.0 (4.8)
Stiffness (N/mm)	109.0 (5.0)	107.7 (5.7)	115.6 (19.2)	106.1 (9.3)	171.2 (11.7)	156.5 (9.3)	183.2 (9.3)	162.9 (12.1)
YS (MPa)	139.1 (5.5)	155.0 (11.1)	179.6 (7.9)	173.1 (9.5)	175.5 (7.2)	173.4 (4.1)	183.1 (5.1)	187.4 (3.7)
YT (mJ/mm³)	2.28 (.15)	2.74 (.21)	3.18 (.29)	3.06 (.25)	2.53 (.22)	2.46 (.15)	2.72 (.20)	2.94 (.28)
EM (Gpa)	5.35 (.31)	5.50 (.52)	6.55 (.68)	6.07 (.50)	8.46 (.90)	7.77 (.47)	8.00 (.52)	8.17 (.63)

* and ** denote p ≤ 0.05 and 0.01, respectively, between landing group to the time-matched sedentary control group. EM, elastic modulus; FE, fracture load energy; FL, fracture load; PYE, post-yield energy; YE, yield energy; YL, yield load; YS, yield stress; YT, yield stress.