Table 2. Descriptive data for the dependent variables in the two hamstring stretching groups

Measures	Pre-stretching	Post-stretching	P value (F value)
Measures	Pre-stretching	Post-stretching	Interaction	Between groups	Within group
FFD test – distance (cm)
PNF hamstring stretching	6.03±11.09	0.15±9.96	0.607(0.281)	0.929(0.008)	0.001^*(21.590)
Jack-knife stretching	6.29±13.09	–.94±8.92	0.607(0.281)	0.929(0.008)	0.001^*(21.590)
FFD test – anterior pelvic tilt (°)
PNF hamstring stretching	55.96±16.15	66.99±12.76	0.240(1.542)	0.504(0.477)	<0.001^*(27.899)
Jack-knife stretching	62.76±19.39	69.22±16.44	0.240(1.542)	0.504(0.477)	<0.001^*(27.899)
FFD test – lumbar flexion (°)
PNF hamstring stretching	96.93±13.07	102.99±14.22	0.288(1.249)	0.883(0.023)	0.004^*(12.912)
Jack-knife stretching	96.09±19.25	105.86±13.54	0.288(1.249)	0.883(0.023)	0.004^*(12.912)
AKE test – right side (°)
PNF hamstring stretching	55.42±9.71	64.83±7.15	0.340(0.994)	0.366(0.888)	<0.001^*(67.739)
Jack-knife stretching	52.67±10.55	59.39±11.12	0.340(0.994)	0.366(0.888)	<0.001^*(67.739)
AKE test – left side (°)
PNF hamstring stretching	53.03±9.47	61.78±8.94	0.957(0.003)	0.707(0.149)	<0.001^*(44.294)
Jack-knife stretching	54.61±8.46	63.19±10.69	0.957(0.003)	0.707(0.149)	<0.001^*(44.294)
ASLR – right side (°)
PNF hamstring stretching	55.22±6.27	68.42±6.85	0.990(<0.001)	0.558(0.364)	<0.001^*(118.973)
Jack-knife stretching	57.92±14.10	71.08±10.99	0.990(<0.001)	0.558(0.364)	<0.001^*(118.973)
ASLR – left side (°)
PNF hamstring stretching	56.50±9.45	69.56±6.13	0.856(0.035)	0.699(0.158)	<0.001^*(152.390)
Jack-knife stretching	58.55±12.13	71.06±11.44	0.856(0.035)	0.699(0.158)	<0.001^*(152.390)

Data are expressed as mean ± standard deviation.
Abbreviation: AKE, active knee extension; ASLR, active straight leg raising; FFD, finger-to-floor distance; PNF, proprioceptive neuromuscular facilitation.
p<0.05.