Table 4. .

Peak Kinematic and Kinetic Variables During the Loading Phase of the Jump Landing (Mean ± SD)

Variable	Menses	Ovulation	Menses, 95% Confidence Interval		Ovulation, 95% Confidence Interval		t or Z	P
			Lower	Upper	Lower	Upper
Kinematics, °
Knee flexion	93.7 ± 8.9	92.7 ± 12.4	89.5	97.8	86.9	98.5	0.7	.49
Knee valgus	−13.2 ± 10.6	−12.4 ± 7.9	−18.2	8.3	−16.1	−8.7	0.4	.67
Knee internal rotation	9.2 ± 7.5	5.3 ± 8.7	5.7	12.7	1.2	9.4	1.9	.07
Hip flexion	−77.7 ± 12.3	−80.8 ± 16.8	−83.5	−71.9	−88.6	−72.9	1.2	.25
Hip adduction	0.9 ± 5.9	0.9 ± 6.3	−1.9	3.6	−2.0	3.8	−0.024	.98
Hip internal rotation	2.9 ± 8.7	6.2 ± 6.8	−1.2	6.9	3.3	9.4	−2.1	.047b
Kinetics, internal moment normalized to body mass height
Knee extension	−0.21 ± 0.06	−0.21 ± 0.07	−0.24	−0.18	−0.24	−0.18	0.4	.68
Knee valgus	−0.02 ± 0.03	−0.06 ± 0.06	−0.04	−0.002	−0.08	−0.03	−2.6a	.01b
Knee internal rotation	0.03 ± 0.03	0.03 ± 0.03	0.02	0.04	0.02	0.05	−0.5a	.62
Hip extension	−0.31 ± 0.23	−0.35 ± 0.40	−0.42	−0.21	−0.54	−0.16	−0.8	.41
Hip adduction	0.12 ± 0.10	0.12 ± 0.13	0.07	0.16	0.06	0.18	−1.0a	.63
Hip internal rotation	0.17 ± 0.18	0.12 ± 0.15	0.09	0.26	0.06	0.19	−2.4a	.02b
Forces
Vertical ground reaction force, Nb	1968.3 ± 623.8	1775.8 ± 642.9	1676.4	2260.3	1474.9	2076.7	2.2	.04b

^aWilcoxon signed rank test.

^bIndicates difference between phases.