Table 3. Effects of stretching on changes in isometric muscle force and electromyographic ctivity at the horizontal position.

Dependant variable	Streching method	Pre	Post 0 min	Post 20 min	Post 60 min
Isometric muscle force at the horizontal position (Nm)	SS	86.8 ± 17.1	77.6 ± 15.2 *	79.8 ± 13.7 *	79.4 ± 14.9 *
	Relative change	-	-10.3 ± 7.2%	-7.4 ± 7.3%	-7.9 ± 9.5%
	DS	86.0 ± 13.5	77.8 ± 15.2 *	78.0 ± 14.1 *	77.5 ± 15.0 *
	Relative change	-	-9.9 ± 5.7%	-9.4 ± 7.7%	-10.2 ± 7.9%
	SS-DS	86.0 ± 17.7	77.1 ± 14.2 *	77.4 ± 13.1 *	76.3 ± 14.7 *
	Relative change	-	-9.8 ± 6.9%	-9.1 ± 7.4%	-10.6 ± 8.7%
	DS-SS	85.4 ± 14.1	77.9 ± 14.0 *	77.1 ± 14.3 *	76.5 ± 13.9 *
	Relative change	-	-8.8 ± 6.3%	-9.8 ± 7.2%	-10.3 ± 7.8%
RMS values (medial hamstrings) (µV)	SS	324.4 ± 99.3	292.9 ± 93.6	282.2 ± 104.8	283.9 ± 116.0
	Relative change	-	-8.5 ± 16.2%	-10.4 ± 25.3%	-10.9 ± 26.9%
	DS	314.8 ± 97.8	284.4 ± 77.7	272.6 ± 92.6	270.4 ± 101.3
	Relative change	-	-5.3 ± 28.0%	-11.0 ± 24.3%	-9.4 ± 33.8%
	SS-DS	312.2 ± 99.0	295.1 ± 87.7	289.4 ± 92.2	272.0 ± 90.9 *
	Relative change	-	-3.8 ± 17.4%	-6.4 ± 13.6%	-11.2 ± 18.0%
	DS-SS	313.8 ± 121.9	294.9 ± 108.5	291.9 ± 100.7	290.3 ± 107.4
	Relative change	-	-1.7 ± 25.0%	0 ± 32.7%	-4.0 ± 20.2%
RMS values (lateral hamstrings) (µV)	SS	263.4 ± 115.4	247.0 ± 114.3	238.7 ± 111.9 *	215.9 ± 77.7
	Relative change	-	-6.4 ± 17.4%	-9.5 ± 14.5%	-13.0 ± 22.2%
	DS	231.7 ± 88.5	210.1 ± 79.5	197.3 ± 65.6 *	209.3 ± 75.9
	Relative change	-	-8.1 ± 16.5%	-10.8 ± 20.6%	-7.8 ± 16.1%
	SS-DS	236.7 ± 83.5	222.4 ± 87.9	216.4 ± 73.2	214.4 ± 82.2
	Relative change	-	-6.5 ± 12.8%	-6.2 ± 16.2%	-8.5 ± 16.1%
	DS-SS	237.4 ± 91.0	236.6 ± 106.4	216.7 ± 90.9	213.6 ± 90.5
	Relative change	-	+4.2 ± 45.1%	-5.6 ± 28.2%	-7.7 ± 25.1%

RMS, root mean square; SS, static stretching; DS, dynamic stretching; SS-DS, static stretching followed by dynamic stretching; DS-SS, dynamic stretching followed by static stretching. Values are expressed as the mean ± standard deviation.*p < 0.05 compared with the pre-stretching value.