Table 5.

Estimated means and SE at baseline (pre-) and posttest and absolute change (±SD) for endurance exercise capacity in the football training (FOOT) and the control (CON) group.

		FOOT			CON			Time	Time x group
		Mean	SE	Change	Mean	SE	Change
Speed at 2 mM lactate (km h-1)	Pre	6.09	0.31		6.51	0.28
	Post	7.26	0.32	1.17 ± 1.27	6.85	0.28	0.34 ± 1.24	0.006 a	0.050a
Speed at 4 mM lactate (km h-1)	Pre	8.15	0.43		8.52	0.40
	Post	9.25	0.43	1.10 ± 0.48	9.26	0.40	0.74 ± 1.06	0.004	0.214
RPE	Pre	15.3	0.5		14.7	0.5
	Post	13.4	0.5	-1.7 ± 1.0*	14.3	0.5	-0.3 ± 1.8	<0.001	0.005
Heart rate (bpm)	Pre	155	3.2		149	2.9
	Post	139	3.2	-14.6 ± 6.7*	144	2.9	-4.9 ± 10.8*	<0.001	0.004
Lactate (mM)	Pre	5.49	0.38		5.51	0.35
	Post	3.50	0.38	-1.99 ± 1.16	4.12	0.35	-1.38 ± 1.87	0.001 a	0.142a

p-values of Linear Mixed-Effects Models analyses (significant values in bold)

* significant within-group change from Pre to Post

^anot normally distributed and log transformed for the analyses. For easier interpretation, non-transformed data means were reported for all variables. RPE = rating of perceived exertion. RPE, heart rate and lactate values of the common highest intensity block, completed in the pre- as well as post-intervention test were reported (i.e., values at the same speed level in both tests).