The gait pattern is not impaired in subjects with external snapping hip: a comparative cross-sectional study

Table 5 Electromyography (sEMG) gait variables

	Preactivation		Acceptance		Middle stance		Late stance		Swing phase
	Group mean	P-value	Group mean	P-value	Group mean	P-value	Group mean	P-value	Group mean	P-value
Gluteus medius (S)	0.41 ± 0.23	0.312	0.58 ± 0.19	0.115	0.24 ± 0.11	0.818	0.16 ± 0.11	0.198	0.26 ± 0.14	0.262
Gluteus medius (H)	0.34 ± 0.12	0.312	0.68 ± 0.07	0.115	0.25 ± 0.10	0.818	0.11 ± 0.05	0.198	0.20 ± 0.09	0.262
Gluteus maximus (S)	0.46 ± 0.18	0.593	0.62 ± 0.22	0.473	0.37 ± 0.17	0.288	0.34 ± 0.19	0.502	0.37 ± 0.13	0.433
Gluteus maximus (H)	0.49 ± 0.11	0.593	0.66 ± 0.12	0.473	0.32 ± 0.13	0.288	0.30 ± 0.12	0.502	0.33 ± 0.10	0.433
Rectus femoris (S)	0.40 ± 0.17	0.092	0.64 ± 0.18	0.884	0.20 ± 0.07	0.819	0.20 ± 0.06	0.309	0.22 ± 0.05	0.204
Rectus femoris (H)	0.51 ± 0.19	0.092	0.65 ± 0.10	0.884	0.21 ± 0.06	0.819	0.25 ± 0.11	0.309	0.25 ± 0.08	0.204
Biceps femoris (S)	0.51 ± 0.23	0.338	0.38 ± 0.18	0.494	0.20 ± 0.10	0.247	0.14 ± 0.13	0.209	0.33 ± 0.09	0.274
Biceps femoris (H)	0.59 ± 0.21	0.338	0.44 ± 0.16	0.494	0.15 ± 0.07	0.247	0.10 ± 0.04	0.209	0.30 ± 0.10	0.274
Tensor Fascia latae (S)	0.32 ± 0.16	0.757	0.61 ± 0.15	0.154	0.34 ± 0.17	0.820	0.23 ± 0.16	0.674	0.33 ± 0.16	0.238
Tensor Fascia latae (H)	0.34 ± 0.12		0.68 ± 0.72		0.35 ± 0.12		0.21 ± 0.09		0.26 ± 0.09

The sEMG data are presented as mean ± one standard deviation (SD) in 13 subjects with external snapping hip (S) and 13 healthy subjects (H) in the following time periods: preactivation (50 ms before heel strike), acceptance (load acceptance and initial single support), middle stance (knee extension and late single support), late stance (opposite foot contact) and swing phase (ipsilateral swing). The sEMG signals are normalized in amplitude to the maximum sEMG signal during gait and expressed as percent-maximum amplitudes.