TABLE 3.

Relationship between hamstring flexibility measured with 4 common tests and the isokinetic function of thigh muscles.

Isokinetic Muscle Function (mean ± SD) (n = 38)			SLR (°) 71.53 ± 14.98		PKE (°) 148.43 ± 11.53		SRT (cm) 4.88 ± 10.32		TTT (cm) 3.27 ± 9.28
			r	p	r	p	r	p	r	p
H (60°/s)	PT (N·m)	59.17 ± 27.35	−0.115	0.490	−0.106	0.528	0.117	0.485	0.101	0.544
	TW (J)	299.38 ± 261.48	−0.065	0.700	−0.009	0.956	0.153	0.358	0.145	0.385
	AP (W)	35.99 ± 22.63	0.020	0.904	0.112	0.505	0.225	0.175	0.222	0.181
H (180°/s)	PT (N·m)	38.61 ± 19.12	0.065	0.696	0.169	0.309	0.180	0.279	0.180	0.280
	TW (J)	597.58 ± 466.42	0.087	0.602	0.229	0.166	0.196	0.238	0.264	0.109
	AP (W)	45.75 ± 37.60	0.154	0.356	0.320	0.050*	0.264	0.109	0.277	0.092
Q (60°/s)	PT (N·m)	122.19 ± 44.27	−0.46	0.782	−0.010	0.951	0.054	0.746	0.053	0.752
	TW (J)	577.60 ± 371.11	−0.131	0.432	−0.078	0.643	0.046	0.786	0.049	0.768
	AP (W)	75.82 ± 36.00	−0.053	0.753	0.000	0.998	0.091	0.586	0.089	0.597
Q (180°/s)	PT (N·m)	84.01 ± 36.81	−0.129	0.441	−0.090	0.590	−0.022	0.895	−0.004	0.979
	TW (J)	1,399.53 ± 679.79	−0.030	0.860	−0.105	0.532	−0.029	0.862	0.019	0.912
	AP (W)	108.28 ± 55.60	0.046	0.782	−0.006	0.969	0.032	0.847	0.048	0.774
H/Q (60°/s)	PT (N·m)	0.48 ± 0.12	−0.156	0.350	−0.220	0.185	−0.020	0.906	−0.028	0.866
	TW (J)	0.59 ± 0.77	0.301	0.066	0.250	0.130	0.288	0.079	0.303	0.065
	AP (W)	0.45 ± 0.13	0.155	0.352	0.152	0.363	0.236	0.154	0.233	0.158
H/Q (180°/s)	PT (N·m)	0.46 ± 0.11	0.353	0.030*	0.449	0.005**	0.372	0.021*	0.330	0.043*
	TW (J)	0.41 ± 0.25	0.142	0.394	0.345	0.034*	0.247	0.135	0.292	0.076
	AP (W)	0.39 ± 0.26	0.149	0.373	0.386	0.017*	0.271	0.100	0.285	0.083

Abbreviations: SLR, straight leg raise test; PKE, passive knee extension; SRT, sit and reach test; TTT, toe touch test; H, hamstring; Q, quadriceps; H/Q, the ratio of hamstring to quadriceps; PT, peak torque; TW, total amount of work; and AP, average power.

* Denotes the correlation is significant and p < 0.05, and ** denotes the correlation is significant and p < 0.01.